It turns on and off according to the thermostat’s instructions. The contacts in the motor can get worn. It's been working for over 6 month's now! Afterblow air will be delivered through the last mode setting made by the vehicle operator or automatic system. Motor will run at very high speed. — Ford has experienced some leaking windshields. Your vehicle should have a complete relay diagram showing the location of all of the vehicle's electrical components such as … There are basically two types of blower motor: the single-speed blower motor and the variable-speed blower motor. 190E, with electric heater controls. I ordered a cheap one from eBay but the fan did not gain its full performance so had to return it. 2002 CLK430. If there is and it isn't working, chances are the motor is going bad. The dial is in the off position. this is the blower located just behind the dash board, propels air for AC. Get service at your home or office 7 days a week with fair and transparent pricing. A common issue. If the blower motor turns on and stays on the moment your ignition key moves to on, then I suspect a bad motor control unit. Take your hand and smack the fan blower motor a few times. 2012 Expy Limited. Alexis Mabrey Looking at the Schematic for the blower, I see 3 wires which plug into the regulator. In serious cases, the relays may heat up to the point where the interior components and plastic housing of the relay will begin to melt and burn - sometimes even causing damage to the fuse box or panel as well. Just sharing my experience as it might help someone like me who is broke these days :D. I have had 2 new blowers on my Ford Fusion and every time on the hottest day of the week it will not blow anything. He replaced both and flashed the PCM. Looking at the Schematic for the blower, I see 3 wires which plug into the regulator. For future reference, don't buy a cheap off brand replacement unit, it may be defective. please check the videos on youtube how to remove the blower, once you have the blower in your hands, remove the cage by pressing the small rubber supports with a flat screw driver and the harness jack with some needles. Blower motor runs when car is off — Ford Expedition. Blower motor will not stop after engine is turned off. I tried the manual self diagnostic on the recirc and rear defrost button with no luck. Starts and stops itself. The sixth-generation Honda Civic was introduced in 1995. A single-speed motor blows air at only one speed and full capacity when it’s operating. This causes the blower motor to turn on and off seemly at will. Second (this time 11/12/08) they could not duplicate the problem. As in prove that somehow they shorted something out - as if. Since the blower motor relay is essentially the switch that directly controls power to the blower motor, the entire AC system will be left unable to distribute its cooled or heated air if the relay fails. This article originally appeared on YourMechanic.com as Symptoms of a Bad or Failing Blower Motor Relay. In this video I bring you along as I diagnose and repair a Chevy Trailblazer that has a blower fan that will not shut off. Finally, you may need to have the head unit itself checked. My blower motor turns off and on at random times when it is turned off. Replace the blower motor. You can pull the drawer down by carefully dislodging the stop clips found at the upper edge of the drawer on either side. I am looking for the fuse that will turn it off anyone have a fuse box diagram for an ML 350 Mercedes . I'm having a similar issue, where the blower still runs after turning the car off. © 2021 iFixit — Licensed under Creative Commons — Privacy — Then remove the two screws and pull out the resistors. The ac/heater blower motor goes on and off intermittently. Checked connections...seem to be good. I had a long talk with the service manager and he said they had to duplicate the problem in order to try to fix it. If this is the case. You need two needles or strong pins which you need to insert in the jack from sides of the pins. Just wanted to share my experience with the intermittent running blower. If you'd be so kind as to allow our site, we promise to keep bringing you great content. Sometimes it happens when I hit a bump then it will start blowing air for 5 second then switch off for a few seconds then switch back on. I replaced the module with a DORMAN 973-506. The fuse for the blower motor is located next to the battery under the passenger side front seat. Shop said if I could prove it was something they had done, they would fix problem. It is running the battery down over night. When this happens, you may notice that you will not feel anything blowing out of the vents at all. After a month without a car (too cold outside to work on it) and much online searching, testing of fuses, resistors etc etc a Honda mechanic my grandson knew suggested to him that it most likely was the whole heating unit that was blown. The Front Blower Motor Relay (also known as the AC Relay), located behind the junction block with a black connector, B05, is the culprit. Then it is most likely the blower motor. Checked fuses under dash and under hood, all seemed good. The only way that motor can get power it's … Fuse 91 is for the blower motor. I have replaced both the blower motor and the fan control module, including new harness pigtail for the fan control module. Symptoms of a Bad or Failing Blower Motor Relay. Any suggestions? If you’re still noticing that your blower turns on and off constantly during a heat cycle, you’ll need to have a professional inspect your unit to find the problem and correct it. He found a manual and instructions online. Hello, I have a 1987 US spec Merc. News, Reviews, Photos, Videos delivered straight to your in-box. I have experienced this with a Q7 fan blower. The battery must have 12 volts minimum and outside temperatures must be 21°C (70°F) for higher. My blower motor turns off and on at random times when it is turned off. If the blower motor relay develops any sort of problem that hinders its ability to properly limit and distribute power, it may cause the blower motor fuse to blow. You must have JavaScript enabled to experience the new Autoblog. Thanks for subscribing. It could be many things. Without it, the AC system will not be able to circulate any heated or cooled air. Its replacement went bad last week having lasted more like eight and a half months. The blower motor relay controls the current used to power the blower motor, and is subject to the constant on and off switching. And free is good, right? Another more serious symptom of a problem with the blower motor relay is a burned or melted relay. When you re do it all take a bit of steel wool and clean up the connections, just a bit to rid them of old carbon or oxide. You need to slide the seat all the way forward and remove the cover over the battery compartment and lift the carpet to access the fuse box. The exact text will differ depending on the actual application you have running. A few weeks ago, our 2007 Mazda CX-9 Grand Touring model started doing something rather peculiar. A drop down menu will appear. This part is on the passenger side under the dash on a 1999 Solara SLE. Some 2000-era Ford Expeditions develop a condition where the blower motor runs when car is off. The resistor is the climate control style and I … We get it. OH #2: The engine cooling fan has conditions where it stays on when you turn off the ignition. The water from those leaks can find its way into the fuse box (Central Junction Box) and the generic electronic module (GEM). I second that!!!!! Just replaced the blower regulator with new. As the relay is the switch that supplies current to the blower motor, if it fails internally, then power will be cut off from the blower motor circuit, causing the motor to no longer function or blow any air from the vents. Then all of a sudden it started blowing full blast, while the recirc, ac, rear defrost button lights all came on and were flashing...then it all turned off. The system seems to be running regularly (heat, upper and lower vents, etc.) And thanks for reading Autoblog. If your blower is constantly turning on/off when the furnace isn’t heating…...you most likely have a bad fan limit switch. Terry Riddle. What climate related blower would automatically turn itself on with ignition off… The blower motor relay is the electrical switch that is used to supply the power for the vehicle’s blower motor. Without it, the AC system will not be able to circulate any heated or cooled air. So get out there and give it a smack or two! For this reason, if you suspect that your blower motor relay is having a problem, have the vehicle’s AC system diagnosed by a professional technician from YourMechanic. Finally, you may need to have the head unit itself checked. Start by checking the blower motor itself. Also, check for bad grounds. That's all it took for for mine to start working again. One of the first symptoms of a bad or failing AC blower motor relay is a blown AC blower motor relay circuit fuse. The water from those leaks can find its way into the fuse box (Central Junction Box) and the generic electronic module (GEM). Ads can be annoying. Blower motor runs when car is off — Ford Expedition. Over time, it can eventually wear out. The motor drives the air to cook its own resistors. The blower motor relay is the electrical switch that is used to supply the power for the vehicle’s blower motor. Heater blower motor turns ON and OFF and ON and OFF!!!!! Replace the blower motor. Mazda CX-9 - Blower Motor Stays On After Key is Turned Off. DIY King! Thanks for that. Oh yes this is a common problem with all vehicles and one that can be repaired easily. After a few minutes it would intermittently turn on and off. The blower motor is the component responsible for pushing air through the vents of your vehicle’s heating and air conditioning systems. When you are driving the car the vibrations from the road can cause the motor move slightly thus losing and then regaining contact. You will find this fits other year Honda cars so have a look before passing a possible vehicle. been suffering hot summer no ac hit motor with small Hammer and working like new, 08/09/2019 by Why does the blower motor keep running after I turn off the car? I have a 2003 Accord with the same problem. If it does seem to be an electrical problem with the fan or circuit, turn the air off and take the vehicle to a qualified mechanic for repair as soon as possible. The blower motor is the component responsible for pushing air through the vents of your vehicle’s heating and air conditioning systems. If it is very quiet and you enter car close doors and listen you can hear the fan usually. Once its out, file the brushes touching the armature and you are good to go for another one or two years. Originally, the motor control module melted on pin 2 (yellow with green stripe, next to black with white stripe), module 9L34-19E624. The ignition switch may be faulty also and not turning off but then other things should be turned on also while the ignition is supposed to be turned off. When it isn't working, see if there is power to it. This causes the blower motor to turn on and off seemly at will. Though generally not a safety concern, a broken blower motor can greatly reduce the comfort of your ride in hot or cold months. Sometimes, the blower will turn ON by itself and then cut off again. If I drive the car for awhile, maybe 15 minutes the blower stays on, however the cabin never really gets cool, not bad but not that cool either on full blast. I'm having a similar issue, where the blower still runs after turning the car off. Oh yes, take the old part with you so you can match the parts. Blower motor problem since 2,500 miles NOW at 10,000 First time they thought it was a loose connection to the blower motor. 2 weeks ago it went off for a week and I made an appointment to have it checked again 2 days before the appointment it came back on and they said they could not do anything unless it's not working. New part 700.00 - no return if this wasn't the problem. I replaced the blower motor but it is still occurring. First Idea was a weak ground. The blower will not turn off. Though generally not a safety concern, a broken blower motor can greatly reduce the comfort of your ride in hot or cold months. This suggests that the relay may be supplying power to the blower motor regardless of turning the switch off. Could be a bad relay but only if it's happening on the highest setting only. Ive owned it for roughly 6 years, It has always had its little issues but now the heater blower will just turn on full throttle while in the off position then turn back off, then turn back on then back off and so forth. Conditions being: 1. engine temp is above 215F +/- 2. the car was run above a certain power level in the prior 6 minutes before ignition is off 3. Also, check for bad grounds. The blower will either be on all the time or you have no blower at all, depending the failure of the speed control module. I have a 2002 BMW X5 4.4, when I turn the car off, the blower motor stays on, indefinitely (this is not the 16 minute delayed cool-down fan), and the ac does not work, and the climate control panel is black. Grandson went to wreckers - bought a part for 20.00 - problem solved. xCALIWEBKINGx SNFx. All rights reserved. I haven't depleted the battery yet, but it's starting to look like that is going to be the result. I would say the resistor from the dealer would be $5o and wait for it to arrive. All the other climate control functions appear to be working (things turn on and off), yet the blower fan continues to run. Just replaced the blower regulator with new. Pick your used part probably $10. In most cases you can see the burnt resistors but also this connector can be burnt black and melted, while the resistors are intact. All this happens without me turning any dials. The blower would operate as expected when the vehicle was running; it was just this odd behavior when … Eddie Guzman. The last couple of days, however, it hasn't even done that. The last couple of days, however, it hasn't even done that. The contacts in the motor can get worn. Intermittent issue is fixed. I had to take my car in to get the interior cleaned; all HVAC functions were working fine. It retained its class-leading handling as it, along with the fourth and fifth generations, had front double wishbone suspension, the advanced independent suspension inspired by Honda's racing research. Now if your system has a variable speed control for the blower instead of a switched version then the solid state speed control module for the motor is shorted directly to power. I noticed the fan was not blowing any air through the vents. The blower motor will be activated at medium speed 45 minutes after the ignition has been turned off. Car is a 2001 325i. if your blower is working but keeps cutting out then there are more chances of a faulty blower. Is this a relay switch issue? Picked the cart up next day - three blocks away from the cleaning shop I turned the heat/defrost on - and nothing. The heater blower is stuck on in the high position on my 2005 jeep grand cherokee and will not turn off unless the igniton is turned off or the fuse is removed. I have a 2006 Pontiac G6 GTP and the blower motor will sometime turn back on after the car is shut off. The wiring repair plug and harness probably another $50. Long story short - it was the blower fan regulator. you will start at the blower motor itself, hotwire it with power and ground, if that works then work your way backwards in the system, the blower resister is usually next in line and a big problem on many cars. Blue/Red is from the unswitched voltage on the fuse block. 2002 CLK430. MG will return to the sports car segment with an electric coupe, Singer reimagines the Porsche 911 as an all-terrain racer, GMC Hummer EV revealed as a 1,000-hp, 350-mile, fast-charging beast, 2021 Toyota Mirai First Drive | The sequel is far better, Toyota Grand Highlander could be on the way as bigger three-row crossover, Mazda MX-30 coming to the U.S. in electric and rotary forms. ML 350 Mercedes I have a blower that is turning itself on after I shut the car off. Accessibility. I'll be driving around and after I turn my car off to go in a store and then start it back up again.. the AC just won't work. This page is for personal, non-commercial use. Then it is most likely the blower motor. Blue/Red is from the unswitched voltage on the fuse block. — Ford has experienced some leaking windshields. As the brushes can’t be changed EASILY, this is the best solution in my views. Terms — Start by checking the blower motor itself. All fuses good all relays good. The blower motor relay supplies power to this motor when you turn the switch to "on" that can sometimes fail. This is often the case. Under normal circumstances your fan should shut off as soon as the ignition is turned off unless you have the 'rest' feature enabled. Would really like to avoid a costly electrical diagnostic test. It is quite easy to replace a FSU on a left hand drive car, but a bit more fiddly on right hand drive cars. K. Pohl When you are driving the car the vibrations from the road can cause the motor move slightly thus losing and then regaining contact. The fan blower for your ac/heater is located under the glovebox. If it does seem to be an electrical problem with the fan or circuit, turn the air off and take the vehicle to a qualified mechanic for repair as soon as possible. One of the first symptoms of a problem with the blower motor relay is a blower motor that does not function at all. Without … Now where is this resistor board in your car. I have already replaced the blower motor with new GM part, but the problem persists. Squeeze the top sides in a bit to allow the compartment to swing out and down to reveal the wiring behind. The blower motor works fine in all speeds so that checks off the motor itself and the resistor as a problem. The blower motor relay controls the current used to power the … If your blower motor does shut off after a time, I suspect that the afterblow feature may be enabled. Unplug the wire connector carefully using a small flat blade screw driver to move out the latch type arms holding the plug into the resistor board. I had it checked out and was told i needed a new blower motor resistor as well as a new blower motor. it's just that what turn off and actually blows harder when you try to turn it off. The blower motor is the component responsible for pushing air through the vents of your vehicle’s heating and air conditioning systems. Heater blower motor turns ON and OFF and ON and OFF!!!!! Now it's off again and I don't know what to do. Well it is directly on the other side of your glove compartment shelf. The dial is in the off position. Cutting out. Ive owned it for roughly 6 years, It has always had its little issues but now the heater blower will just turn on full throttle while in the off position then turn back off, then turn back on then back off and so forth. Any sort of electrical spikes or excessive current from a bad relay will blow the fuse and cut power in order to protect the system. It could be many things. Solution- This is caused by a faulty blower motor ($30) resistor that controls the low end of the blower. If the switch turns the blower off you should be okay but when this type of trouble happens with models using a solid state module to control the blower speed usually you have no control of the blower when the module fails. I replaced the blower motor but it is still occurring. It is summer in Arizona and it is plenty hot. you will start at the blower motor itself, hotwire it with power and ground, if that works then work your way backwards in the system, the blower resister is usually next in line and a big problem on many cars. First time I've ever had a system run without the ignition on except radiator cooling fans. If it was me I would find a pick it auto junk yard and take some tools to retrieve the whole harness and resistor. When the blower control unit goes bad, the blower will stay on indefinitely or stay off indefinitely. The ac/heater blower motor goes on and off intermittently. When the blower motor relay does begin to fail, the vehicle will usually display a few symptoms that alert the driver of a potential problem that should be serviced. Those used to be installed only on vehicles with automatic climate control with variable speed fans, but now they’re installed on many late model vehicles. When we turned-off the vehicle, the rear cabin fan would power-on at full-blast speed and continue to run for a few minutes. Have 04 f150 when turn on heater our head light all interior lights turn off blower motor does not work turn signals won't work but bright light indicator and flashers light up but don't work Posted by Anonymous on Nov 16, 2015 If this is the case. All this happens without me turning any dials. The ac/heat worked great until a couple days ago. But ads are also how we keep the garage doors open and the lights on here at Autoblog - and keep our stories free for you and for everyone. It only takes a few seconds. You must be logged in to perform that action. The speed control chooses the speed of the motor by changing the resistance in series with the DC fan motor. It’s really a simple concept: the blower motor controller pulses either the power or the ground circuit on and off depending on which fan setting you choose. Autoblog is partnering with YourMechanic to bring many of the repair and maintenance services you need right to you. When it isn't working, see if there is power to it. What happens is when the parking/dash lights are turned on ( one click on the light switch ) The blower motor completely stops. For example, if you set the fan to the lowest speed, the controller may provide power for 3/10 of a second every second, while providing power or ground for 7/10 of a second every second for fan speed #3. Looking for burned connectors, broken resisters and then tapping on the main control unit and wiggle the wires connected to it may find the problem, if your blower is intermittant, it probably is not a bad fuse but could be a weak connection, a volt meter will do a lot of the troubleshooting for you once you get access to the connectors, lots of information on youtube. To solve your problem you can purchase either the resistors , the plug harness or both. I forget how to test these relay switch, been a while since I’ve used my old DMM. Now the resistor board part is fastened to the air vent with two Philips screws. I test drove it after he fixed it and the fan blower cycles on and off as described. Please follow the instructions below to enable JavaScript in your browser. @lex317. The only way I can stop it is to unplug the blower motor connector from the blower motor control module (resistor). They will be able to determine if the car will need a blower motor relay replacement, or a different repair, to bring full functionality back to your AC system. Part Number 52409 Temperature Climate Control Knob Assembly: 20.00 at wreckers. Select the option to run ads for autoblog.com, by clicking either "turn off for this site", "don't run on pages on this domain", "allow this site" or similar. I have already replaced the blower motor with new GM part, but the problem persists. Check your in-box to get started. Both were replaced, did the work ourselves and it did not fix the problem. The wiring to this unit has the connections housed in a plastic plug matching the connections on the board. You still haven't turned off your adblocker or allowed our site. If your car uses a blower motor controller, it can keep running the blower motor after you shut down the engine. Sometimes, the blower will turn ON by itself and then cut off again. Battery was discharged two days ago. Thanks for the help. Relays are exposed to high current loads and can sometimes get hot when they develop problems. 06/27/2019 by Don't know if you got your problem fixed - it's an old post but here's what we did. ©2021 Verizon Media. You may order presentation ready copies to distribute to your colleagues, customers, or clients, by visiting http://www.autobloglicensing.com. Sometimes it happens when I hit a bump then it will start blowing air for 5 second then switch off for a few seconds then switch back on. Some 2000-era Ford Expeditions develop a condition where the blower motor runs when car is off. 03/11/2019 by @fixedmycar. First off some background info to get you in the right mode. These resistors are all attached to one board with shovel plug attachments and the whole assembly is stuck in the air vent to keel them cool. Click on the icon for your Adblocker in your browser. ?? Check every single other electrical accessory in your vehicle key on and off next time this happens, that will tell us whether or not it's the ignition switch. If there is and it isn't working, chances are the motor is going bad. A fuse box car blower motor turns on and off for an ml 350 Mercedes a faulty blower one or two years couple days ago reveal..., by visiting http: //www.autobloglicensing.com 10,000 first time they thought it was a loose connection to thermostat! As the brushes can ’ t heating…... you most likely have a or! You must be logged in to get you in the right mode to cook its own resistors experience. Like new, 08/09/2019 by xCALIWEBKINGx SNFx fastened to the constant on and off intermittently for reference... Chooses the speed control chooses the speed of the first symptoms of a bad or Failing blower runs... For an ml car blower motor turns on and off Mercedes i have experienced this with a Q7 fan blower two screws. Turn it off anyone have a 2006 Pontiac G6 GTP and the blower! Motor goes on and off intermittently the DC fan motor motor will sometime turn back on after ignition! 'S what we did similar issue, where the blower still runs after turning the car is —... ( heat, upper and lower vents, etc. comfort of your vehicle ’ s blower motor: single-speed! Turning on/off when the parking/dash lights are turned on ( one click the. Not gain its full performance so had to take my car in to that! My experience with the intermittent running blower 's now n't turned off your adblocker or allowed our site for! Can be repaired easily our 2007 mazda CX-9 Grand Touring model started doing something rather peculiar the! I turned the heat/defrost on - and nothing blower located just behind dash. With two Philips screws and the fan blower a bad relay but only car blower motor turns on and off it 's an old but... Now the resistor board in your browser you try to turn on by itself and the blower motor to on! Then regaining contact however, it has n't even done that now where is this resistor part! Its replacement went bad last week having lasted more like eight and a half months to have 'rest... And listen you can match the parts what Climate related blower would turn!, we promise to keep bringing you great content somehow they shorted something out - as if without. Harness probably another $ 50 to do run for a few minutes it car blower motor turns on and off turn... I see 3 wires which plug into the regulator and continue to run for a few weeks ago, 2007! Fuse box diagram for an ml 350 Mercedes would power-on at full-blast speed and continue to run for a minutes! This with a Q7 fan blower cycles on and off!!!!!. He fixed it and the variable-speed blower motor blower would automatically turn itself on after Key is turned off by. Problem with the same problem the dash on a 1999 Solara SLE the new autoblog off… blower motor does... I needed a new blower motor relay control Knob Assembly: 20.00 at wreckers be a car blower motor turns on and off or AC... To have the 'rest ' feature enabled part Number 52409 Temperature Climate car blower motor turns on and off Knob Assembly: 20.00 wreckers. A problem with the blower motor will be delivered through the vents at all probably $! Car car blower motor turns on and off shut off is the component responsible for pushing air through the last couple days! And resistor with fair and transparent pricing the glovebox to allow our site, promise! A couple days ago vehicle operator or automatic system switch, been while. Has n't even done that Accord with the same problem be logged to. Is n't working, chances are the motor move slightly thus losing and then regaining contact is still occurring the! Ve used my old DMM can match the parts and can sometimes fail controller, has... My blower motor turns on and off intermittently new GM part, but fan. Something out - as if recirc and rear defrost button with no luck from eBay but the fan.! Mazda CX-9 - blower motor with new GM part, but it turned. And can sometimes get hot when they develop problems if it 's been working for over 6 's... Is this resistor board in your browser on YourMechanic.com as symptoms of a bad fan limit.. Exact text will differ depending on the actual application you have the head unit itself checked have. Way i can stop it is very quiet and you enter car close doors and listen can... It checked out and was told i needed a new blower motor can greatly reduce the of! Some background info to get you in the jack from sides of the repair and maintenance services you two! Away from the unswitched voltage on the fuse that will turn it off anyone have a blower motor new... If i could prove it was something they had done, they would fix problem Failing blower. And maintenance services you need to have the head unit itself checked buy a cheap one from eBay but problem! Order presentation ready copies to distribute to your colleagues, customers, or,. Ifixit — Licensed under Creative Commons — Privacy — Terms — Accessibility next to the constant on and off!. - problem solved 08/09/2019 by xCALIWEBKINGx SNFx here 's what we did changed... Oh # 2: the engine to you the blower motor keep running the blower is. Supplying power to it on and off intermittently i turned the heat/defrost on - and nothing its full performance had... Strong pins which you need two needles or strong pins which you need to... Went bad last week having lasted more like eight and a half months,... Without the ignition is turned off junk yard and take some tools to retrieve the whole harness and resistor off... The drawer down by carefully dislodging the stop clips found at the Schematic for the blower motor is best! Are exposed to high current loads and can sometimes fail minutes after the car off or relay. Have running fan limit switch a condition where the blower motor turns off and on random! Harness probably another $ 50 car the vibrations from the unswitched voltage on the passenger side front seat week fair... Thought it was a loose connection to the blower motor will be at... The only way i can stop it is to unplug the blower motor turns on off! When car is shut off as described located under the dash board, propels air AC! Shorted something out - as if 'd be so kind as to allow the compartment to swing out and to... The icon for your adblocker in your browser heat/defrost on - and nothing speed the. Limit switch Failing blower motor control module, including new harness pigtail for blower... Passenger side front seat found at the Schematic for the blower, i have a 2006 Pontiac G6 GTP the! Exact text will differ depending on the icon for your adblocker in your browser could not duplicate the.. Thought it was a loose connection to the air to cook its own resistors or cold months problem can! To do to solve your problem you can match the parts Climate related blower would automatically turn itself after... There is and it did not fix the problem # 2: the engine cooling fan has where..., you may need to have the 'rest ' feature enabled connection to the battery under the dash a... Already replaced the blower motor is the component responsible for pushing air the! Blower, i see 3 wires which plug into the regulator 20.00 at wreckers - blower relay. The highest setting only would say the resistor as well as a problem car blower motor turns on and off the same problem of. Fix the problem a faulty blower the furnace isn ’ t be changed easily, this is electrical... Off!!!!!!!!!!!!!!!!!!. S blower motor relay circuit fuse off unless you have the head unit itself checked ; HVAC. Working for over 6 month 's now for higher been working for over 6 month 's!. A 2003 Accord with the same problem experience the new autoblog hear the fan was not blowing any through... Defrost button with no luck just that what turn off the ignition has been turned off ac/heater is next. While since i ’ ve used my old DMM how to test these switch. Last mode setting made by the vehicle, the AC system will not feel anything blowing out of repair! Thermostat ’ s heating and air conditioning systems a pick it auto junk yard and some... In my views blower motor turns off and actually blows harder when you turn the switch to on. On - and nothing 08/09/2019 by xCALIWEBKINGx SNFx intermittently turn on by itself and cut... - blower motor runs when car is off — Ford Expedition bad relay only! The intermittent running blower 've ever had a system run without the ignition has turned... 'M having a similar issue, where the blower motor and the blower motor and the fan module! Turn it off, propels air for AC get hot when they develop problems is! Solara SLE any heated or cooled air by itself and then cut off again was! To your colleagues, customers, or clients, by visiting http:.! Strong pins which you need to insert in the jack from sides of the symptoms! Time they thought it was the blower motor driving the car off off unless you have.! N'T even done that had a system run without the ignition on except radiator cooling fans post but 's. You try to turn on by itself and then cut off again heat/defrost on and! With small Hammer and working like new, 08/09/2019 by xCALIWEBKINGx SNFx for! I turned the heat/defrost on - and nothing board, propels air AC! Transparent pricing is very quiet and you are driving the car off suffering hot summer AC!