Hvac Blower Motor Works Intermittently

When this happened, the customer said that the Electronic Throttle Control, ABS, Traction Control, and sometimes the 4WD lights would come on. It worked for a few days, then the blower motor stopped working again. Before troubleshooting any HVAC system, it’s a good practice to become familiar with the components and wiring diagram, check for and follow any on board diagnostics (fault codes in the manufacturer’s control board). 9 L Cummins diesel). My neighbors 01 Dodge Dakota pickup truck was having an HVAC blower motor issue. Play with all the switches a little and make sure that they are set in the right position or the temp selector is all the way to the left (if it is, turn it to the right up or up out of that last position), in the last (A/C) position. Best Answer: no the blower motor should never do thatthis normally indicates there is some kind of problem with the blower motor or there is some componet that controls the fan motor in the air handler that is going bad. In a nutshell: when it works it still blows cold as ice, the idle is fine, and there is no difference between stopped and freeway speeds. What do you guys think?. Before we focus on the motor and controls of the air handler blower fan (used in both air conditioning and heating systems) let's ask if the trouble is not specifically the blower fan but more basically: the air conditioner or heater itself just won't start in response to a call for cooling or heating. Blower seems to work fine with heater. No matter what you call it, how much it’s going to cost to replace your blower motor depends largely on 2 factors:. If the motor will just not run, many times the problem can be solved by just replacing the brushes in the motor. ac blower hi there everyone, i was wondering if you guy ever encounter this problem when replacing a new air filter and notice that when you raise up the bar for a full blast of ac, the motor to the ac blower sound like a jet engine. If you know the sequence of operations, you can pinpoint where the. Order GMC Yukon Blower Motor Resistor online today. on my 95 the ac will always do its thing, but the blower motor only works half the time, any ideas? and by the way, on the 97, the passenger side comfort is always hot unless you adjust it to total cold. [Archive] blower not working on 5 GMC Sierra Forum. The next most common problem that can occur with an air handler is a failure of a blower motor whether it be the blower motor or something else that causes the blower motor to fail. Ok, the HVAC guy came out and found the problem. Conclusion. While driving with my so called not working blower, it kicked in! Made me slightly more happy knowing that it kinda worked. Started getting worse, with a lot of sporadic panting, and now very seldom works correctly, sometimes even not at all. Are you facing issues with the blower motor in your car? From frustrating or even noisy operation to no circulation of air, blower motor not working in your car can be an annoying issue. 12 Volt Source -> Heater Blower Fuses -> Blower Motor Relay -> Blower Motor Resistor -> Blower Motor When testing for power, use a test light, it is a lot easier than having to place your leads on a good ground, place the other one into a prong, and all at the same time, look for a number on your multimeter. Anyway it doesn't matter, you called it on both accounts. Look for a Reset button near the blower motor’s housing and, if you find one, press it. Ordered a replacement and 2day air shipment, hey it's hot in Houston right now, for $257. Sometimes the blower motor doesn't want to switch on. Just replaced the AC panel and switch. The strange thing is it will work perfect for a week, then act up for a day or two. How Do You Handle a Furnace Blower That Is Making Noise? A noisy furnace blower usually indicates a problem with either the blower's electric motor or the blower wheel. I'm assuming the FRONT blower motor is "key on" and the other is driven another way?? In other words-- is my ignition switch to blame and needing replaced-- or is there another road I need to follow. I have 2 issues: 1) The blower motor intermittantly cuts out. Very intermittent. 2018 intermittent blower motor issues Starting the last week the blower motor on the ac/ heat won’t work sometimes. And sometimes ill turn on the ac and the blower wont even come on. It fits almost all of the truck and sport utility vehicles like the Ford Escape, Expedition, Explorer and Lincoln Navigator from 1999 through 2012. It could also be the blower wheel. At 90,000 bought new the blower motor stopped coming on. Gas that enters the furnace is ignited by the pilot light. When it works it functions without issue. Once it's gets going again it will be fine and work great. There seemed to be a light vibration too. The resistor broke and was not letting the fan operate correctly. My fan indicator shows the fan working at the proper speed, but no air is coming out. The customer in this particular troubleshooting situation is somewhat savvy about his 12-year-old gas furnace. I replaced the blower motor and it would blow intermittently for a few days then stopped all together so I then replaced the blower motor resistor and I still have nothing. Then I realized the a/c compressor was dead too. While driving with my so called not working blower, it kicked in! Made me slightly more happy knowing that it kinda worked. Blower Motor Failure | Common Air Handler Problems. NOT FIXED 3. Air Conditioning - Air Conditioning working intermittently - I'm having issue with my air conditioning not working all the time. What is the next step? Bad blower motor?. Let's see if we can pinpoint this intermittent fault No fancy tools required!. my furnace blower sometimes starts very slowly then little by little it picks up speed. I have struggled with my heat/AC for a few weeks now. Before troubleshooting any HVAC system, it's a good practice to become familiar with the components and wiring diagram, check for and follow any on board diagnostics (fault codes in the manufacturer's control board). Will get to the diagnostic phase tomorrow, but I have one question; should the green AC light come on when the heater fan is turned on and the AC button is in the outward OFF position?. At times it will come on as soon as I crank engine, at times it will not come on at all. They are two different mods that help with performance in similar and in different ways. It fits almost all of the truck and sport utility vehicles like the Ford Escape, Expedition, Explorer and Lincoln Navigator from 1999 through 2012. The blower motor works on only one speed. You may hear the blower motor referred to as a fan motor, but both names refer to the exact same thing. Furnace works intermittently. HVAC systems circulate air through cold copper coils to. The blower motor resitor pack is defective and needs to be replaced. 1997-05 Buick Century Blower Motor Resistor. it actually reinforces that it can be resister by working intermittently. I suspect it's the blower motor, let me tell you why: My house fan kinda behaves like that… when the blower motor is about to die, sometimes it won't come on at all, other times it will work just fine, before finally dying, months later. but once there you can't change it at all. 2004 Chevy Silverado 5. And the "bushings" are not the usual problem when blower motors get intermittent and quit. The blower motor on a 1999 Dodge Ram VAN 1500 is located (when facing the front of the vehicle) below the AC/Heater Core box on the left side. Four different mechanics and dealers have looked at the problem. I had no problem changing the blower motor, it was quite easy in fact. Order your BMW Heater Blower Motor with Fan Cage - 1AHCX00135 today at 1AAuto. NOT FIXED 3. This might go on just for a few minutes or a couple of days. If your furnace has a PSC motor, a licensed contractor should regularly lubricate the blower motor with oil ensures that the fan is able to turn easily (ECM motors use ball bearings and therefore require little or no oiling). com FREE DELIVERY possible on eligible purchases. Is it my blower motor resistor or the motor? Both are $50 parts so i dont wanna gamble and guess it. Make sure you have the right wires and motor and you should have your heat and AC working consistently in no time at all. It worked for about 2 weeks and now it stops intermittently until yesterday when it has stopped for good. When you try to turn on the heat or ac the blower comes on intermittently. But can be moved back and forth to work around it. Any help would be greatly appreciated!. 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. Furnace brand should not drastically affect the cost to replace a blower motor because many furnace makes and models—including Carrier and Trane—use the same internal components. All for the same problem. In this video, we look at intermittent blower motor function on a Ford Expedition but will be the same for similar F150's. Ok, the HVAC guy came out and found the problem. Sometimes you can verify a bad blower motor with a rap from a screw driver handle on the bottom of the blower motor when it's not operating but the ignition key and blower switch are 'ON'. Maybe for minutes, maybe for days or weeks. Replaced all 3 control knobs (fan speed, temp & ac knob). Dirt build up impedes the operation of the blower motor. I've checked the fuse in the dash fuse panel and it is good. I replaced. The mechanic says it is most likely an electrical issue since everything else was replaced and is in working order. Other HVAC repairs are NOT covered in this product safety special coverage bulletin. Well t he culprit is normally the Heater Fan Blower Motor Tandem Resistor with OE/OEM Number 6Q0959263A / 6Q0959263/6Q0 959 263 A, manufactured by Hans Pries. Furnaces need monthly maintenance and many do-it-yourselfers overlook the blower-fan belt. Look for a Reset button near the blower motor’s housing and, if you find one, press it. Blower motor gets stuck in a lat spot and will not turn. Better airflow control has several benefits: Electrical efficiency. How Do You Handle a Furnace Blower That Is Making Noise? A noisy furnace blower usually indicates a problem with either the blower's electric motor or the blower wheel. Not to bad to replace. Let's see if we can pinpoint this intermittent fault No fancy tools required!. The blower motor resistor is an electrical component that is a part of the vehicle's heating and air conditioning system. We took a 200 mile round trip today. Sometimes you turn the car on and it won't work and then later when you are driving it comes on. You can set it at 90 and the heat will not kick on unless you switch it to the On position. I replaced the resistor and it now works on all settings. Unplugged. Got to my destination, turned off the key and the blower kept running. Manufacturer. My thought process based on the issues with the older cherokees would be blower motor power pack. Will get to the diagnostic phase tomorrow, but I have one question; should the green AC light come on when the heater fan is turned on and the AC button is in the outward OFF position?. Having a blower that works intermittently is an inconvenience. Often the best way to figure out what is wrong with something is to know how it is supposed to work. Many owners are having problems with melted electrical connectors that stop the flow of power to the blower motor. The blower motor is located below the glove box. Hi Darek, thank you, thank you, thank you, I pulled my blower motor the other day and cleaned everything up and I can not believe how hot it now blows. When it does work all fan speeds work. I'm assuming the FRONT blower motor is "key on" and the other is driven another way?? In other words-- is my ignition switch to blame and needing replaced-- or is there another road I need to follow. My fuses are good so I am down to this. Goodman technical support information, product brochures and more. I picked up a modern 1/6 hp motor and a belly band, and, many small adjustments later (with no shortage of cursing. I have been having an issue with I guess the blower on the air conditioner on my 2004 mustang. Reconnect the electrical connector and you’re car heater blower motor is back in business. At 90,000 bought new the blower motor stopped coming on. I replaced mine on my 4Runner after Low stopped working and it restored all function. If the fuse that controls the blower motor starts acting up, or even worse—gets blown, then the blower motor will work intermittently or not at all. Knowing how to troubleshoot and diagnose problems with these motors is an essential skill an HVAC technician must possess. on the way there, the blower worked fine. My heat and air work and I can feel it coming through at highway speeds, but the fan doesn't blow it into the cabin, so the dial for fan speed does nothing. Hey guys went on a call, forced air furnace, blower motor marathon motor, no capacitor, intermittently, motor tries to start and hums, give the pulley a little push and she takes off. Mechanical Problems & Technical Chat. Canuck, your blower needs power are you saying this blower turns on with the main ignition off or on? If when off you have an ignition main switch problem, and blower problem if when on you have a semi conductor problem with the blower control. I have attached a picture of the plug that plugs into my blower motor. So now im pretty sure that it's the blower motor resistor again. Find your fuse panel and check the fuse for the "blower motor" or "vent fan" or something like that. Plugged it in and the blower spun up while sitting on the floor. After replacing it, it blew air for a while regularly then stopped and intermittently works, the blower is always running properly, you can hear it, but the blower does not move air when this occurs, seems to be more frequently not working now. Turn on AC 2. A compressor, Condenser, Evaporative (Evap) core, Expansion valve, receiver dryer, hoses and lines, thermo sensor and the controls. Hello, Have a 1999 V70. It has only done this 2 times, 1 day when I was sitting at a stop light and then today when I was driving along. Got the motor to where I could see it, and noticed the motor would cut in and out when I moved it's connector around. Mechanical Problems & Technical Chat. Fat chance of finding one. It could also be the blower wheel. My thought process based on the issues with the older cherokees would be blower motor power pack. I can feel cold air trickling out when I turn the A/C on, but no blower assist. First of all, the fan is intermittent. It does tend to work better when the heat is. Is it most likely a AC Blower Motor or could it be something else? Thanks for the help. This can be annoying, but troubleshooting is easy. I am getting prices on replacement and its like $500 for something I can do in my yard in ten min. 10-12 minutes later air suddenly feels cool around 60 F, nice stay chilled air blows from vents. 2007 Toyota Corolla AC Blower Issues It might be on its way out and work intermittently. The blower motor does not run at all, can you help? Answer – Usually with a bad blower resistor, the high speed would still work; so I wouldn’t suspect that is your problem. Normally when the blower module fails, it will not cause intermittent blower function. The blower wheels or fan blades mount directly to the motor shaft, which minimizes the amount of friction created as the motor drives the equipment. Change the AC dial from min to max, nothing,,,,, All of a sudden, after hitting a bump, the darn thing 2007 Dodge RAM HEMI, AC Blower intermittently stops blowing. Air Conditioning and Cooling Systems - Air Handler/blower motor is intermittent and acting weird - Hello! I'm having trouble with the air handler/blower motor randomly cutting in and out, or not. Back in the 70s and 80s blower motor problems with General Motors Corp. This is the device responsible for applying the correct voltage to the blower motor, based on driver input from the vehicle’s manual 4-stage fan setting on the IHKS (Integrated Heating/Air Conditioning) controls. , the fan speed indicates full speed, the temperature setting, etc); when the blower does operate, it seems to operate fine, with no bearing noises, etc. Heater(blower) works intermittently. Have replaced blower motor resistor, blower motor, TIPM, taken out entire dash to look for loose wiring. There are few things to inspect and confirm before you directly replace blower motor. This premium aftermarket motor is manufactured to meet or exceed your expectations for fit form and function. They drive Explorers, and of course the officers have the heat or AC running all the time. I say blower motor. When using the A/C everything works fine. 63 delivered. SSM 47797 2008-2019 Various Ford/Lincoln/Mercury Vehicles - Inoperative Heating, Ventilation, And Air Conditioning (HVAC) Blower Motor Some 2009-2017. One moment it works completely fine, the next it doesnt work at all. Blower doesn’t work Equinox Blower doesn’t work Equinox, no blower or intermittent operation. The blower motor is located below the glove box. Replace the blower. Motor( blower) waits approx. NOT FIXED 2. 3L Z-71, 46,000 mi. About five minutes into the drive it started to blow cold. I have a 2002 I35 that has an intermittent Blower Fan motor. Sometimes it works fine for a while but this morning it didn't want to turn on. The blower motor power transistor is commonly referred to as the blower motor resistor when in the true technical sense it isn't a resistor. When AC was added, many years ago, for some reason they rewired the low voltage power supply for the furnace to come from the AC transformer, which is located outside the house, some distance from the furnace. Make sure you have the right wires and motor and you should have your heat and AC working consistently in no time at all. I noticed that, intermittently, the blower motor will kick down from the speed its at to a very low speed mode. Blower motor works intermittently. This is due to the fact that the blower motor power transistor does pretty much the exact same job as the old style resistors of vehicles of the 80 and 90's. vehicles were almost unheard of. This 2004 Chevy Trailblazer came in with multiple concerns. Chevrolet Silverado 1999-2006: Why Doesn't My Blower Motor Work? Why Doesn't My Blower Motor Work? If your blower motor is beginning to go, you'll want to replace it sooner than later because a bad blower motor could lead to a fire. I noticed that, intermittently, the blower motor will kick down from the speed its at to a very low speed mode. Then all of a sudden it started blowing full blast, while the recirc, ac, rear defrost button lights all came on and were flashingthen it all turned off. Blower motor intermittent. 2008 non-functioning HVAC blower motor. NOT FIXED 2. Other people on the web have had small fire melted wires. The blower motor sits right next to the resistor or controller (resistor is for manual AC, controller is for automatic AC system), so the connector can be found on the blower motor itself. DASH AC blower stopped working The blower motor is behind there. Is your AC not working? If your central air conditioner is not cooling right, repair it with these expert DIY air conditioning repair techniques. They are both next to each other under the dash near the firewall behind the glove box. Its speed is controlled by a resistor. AC/Heater blower motor replacement I found a tip about tapping the blower motor to see if it comes back on and it does. The fan starts up fine, runs fur just under 60 seconds and shuts down for about 20 seconds and turns on again repeating the process. Got the motor to where I could see it, and noticed the motor would cut in and out when I moved it's connector around. When it works, it works great. Replace the blower. My niece's '98 worked on 3, 4, and 5 only. If the blower is on high it tends to stay on. When you drive such a motor with AC, the current in the coil changes twice in each cycle (in addition to changes from the brushes), but the polarity of the stators changes at the same time, so these changes cancel out. The Air conditioning (AC) system in your Subaru is made up of the following. Blower motors can go bad as well, though they usually won't work on start-up, rather than stop working while running. Unplugged. The a/c blower has begun to work only sometimes. I had 2004 with the same problem. My heat and air work and I can feel it coming through at highway speeds, but the fan doesn't blow it into the cabin, so the dial for fan speed does nothing. I'm having a problem with my Broan Electric furnace lately. It does tend to work better when the heat is. NOT FIXED 2. Started getting worse, with a lot of sporadic panting, and now very seldom works correctly, sometimes even not at all. Sometimes you can verify a bad blower motor with a rap from a screw driver handle on the bottom of the blower motor when it's not operating but the ignition key and blower switch are 'ON'. If the blower works but only on high speed only it's going to need the blower motor resistor replaced. Other HVAC repairs are NOT covered in this product safety special coverage bulletin. It provides airflow over the heater core to generate heat in the winter and over the evaporator to provide air conditioning in the summer. Has your automotive's Blower Motor assembly failed? Then shop at 1A Auto for a high quality Air Conditioner (A/C) & Heater Blower Motor replacement for your car, truck, SUV or van, at a great price. Plugged it in and the blower spun up while sitting on the floor. The test light should light up. this would cycle about. A compressor, Condenser, Evaporative (Evap) core, Expansion valve, receiver dryer, hoses and lines, thermo sensor and the controls. My blower seems to work whenever it wants? When I first got the truck it worked once. The fan will not work if the AC is on and the fan direction selection is not set correctly (like defrost). So now im pretty sure that it's the blower motor resistor again. com Home Appliances Air Conditioners. Not to bad to replace. Look at the fuse placement diagram on the back of the lid and find the blower motor fuse. 12 Volt Source -> Heater Blower Fuses -> Blower Motor Relay -> Blower Motor Resistor -> Blower Motor When testing for power, use a test light, it is a lot easier than having to place your leads on a good ground, place the other one into a prong, and all at the same time, look for a number on your multimeter. After I got the blower motor and housing out of the way I looked for a way to get to. Sometimes when I start the car it turns on, and sometimes it doesn't work at all. Intermittent Blower Motor Interestingly when set to "fan-on" mode the blower doesn't seem to trip out as often, but still will. The standard unit has a resistor The Deluxe/automatic A/C (the one where you set the temp number and the car maintains that temp) will have a control module. 5 HVAC System Sounds You Don't Want to Hear If your HVAC system is making funky noises, contact a professional to investigate before it turns into a large repair bill. - Occasionally works turns on and off - Slamming the right hand side passenger door would temporarily fix the problem - Tapping on the blower motor metal housing with the handle of a screw driver would temporarily fix the problem - Wiggle the blower motor power source - Blower motor turns on and off - Wiggle the housing - Blower motor turns on. Fan makes a small abnormal noise when running and won't reach the highest blower setting when it is working. Few weeks ago, the switch on the front panel failed. Is it most likely a AC Blower Motor or could it be something else? Thanks for the help. My neighbors 01 Dodge Dakota pickup truck was having an HVAC blower motor issue. Conclusion. Got the motor to where I could see it, and noticed the motor would cut in and out when I moved it's connector around. Now it will not come on at all. Blower motor plug required a squeeze on the left hand side tab to remove it, never know to expand or to squeeze these things. It is mounted in the heater housing behind the right side of the dashboard. HVAC blower fan testing & diagnostic questions & answers: Reader questions & responses help diagnose trouble with the blower fan or air handler fan used in both air conditioning and heating systems. The problem sounds like it is with your blower motor, not your AC system. The factory service manual was a big help as it led me step by step as I removed the center console, all the trim around the shift lever, the lower instrument panel and the center trim panel with the AC controls and then finally the blower motor and housing. The higher current can make the jump across the resistor contacts that are going bad and get the blower motor to engage. However, they did require a lot of electrical energy. If the fan only works on the highest setting then it sounds like a blower motor resistor. ran a ground wire from a chassis ground to the blower motor and it works fine. The blower motor resistor is an electrical component that is a part of the vehicle's heating and air conditioning system. Replace the blower. Hi Darek, thank you, thank you, thank you, I pulled my blower motor the other day and cleaned everything up and I can not believe how hot it now blows. Loss of fan - blower motor (hvac) high speed operation failure. Air is cold so I know the system is. Below are some questions asked by a few VW owners regarding their respective VW vechicle refering to the fan/AC/Blower motor. 2) The highest speed does not work-it stays the same speed as the 3rd position. Blower motors can go bad as well, though they usually won't work on start-up, rather than stop working while running. HVAC Blower Motor Connector by Dorman®. Cost of a new resistor card is about $12 from AutoZone, etc. Intermittently works when activating ignition via the key. This left the three screws holding the blower motor up, not the Phillips head screws, those are just for the cap. My climate control was fine until my mechanic was rummaging underneath the dashboard and now it works intermittently. I can feel cold air trickling out when I turn the A/C on, but no blower assist. I’d replaced blower motor about 3 weeks ago and all was well until it started working intermittently. Our central air conditioner units will have problem as it ages. We had this same problem earlier in the year and had the only outfit that our home warranty uses come out to look at it. Re: 2006 Honda Odyssey / Intermittent AC problem Well if the pass side works, and the driver side doesn't, I would be looking for a flap that's not working. It would intermittently blow on high, with no means to adjust it, then work normally for a few days. The customer in this particular troubleshooting situation is somewhat savvy about his 12-year-old gas furnace. Symptoms covered include, noisy operation and fan speed control problems on Fusion cars from 2006 through 2012. Heater(blower) works intermittently. The components in your Jeep receive stable electrical power thanks to the fuses that regulate them. Front blowers don't work when back ones do. Replaced the blower motor and resistor with no change. Troubleshooting/Repair. A blower motor resistor or a blower motor control module is the part that controls the speed of the blower motor. I tested the bottom sequencer but afaik it is good. Few weeks ago, the switch on the front panel failed. You can set it at 90 and the heat will not kick on unless you switch it to the On position. Sometimes it is the housing vibrating from the spinning of the blower fan. Electronic Ignition Gas Furnace Problems & Troubleshooting - Gas furnaces are a very popular form of heat for homes and businesses and occasionally a gas furnace needs to be repaired because of a problem with the gas furnace. See 100 other super simple car repairs you can do on your own and avoid a trip to the shop. If anyone has any info on this subject, please include specific info, such as where said items are located. Submission Guidelines: First search the links below for specific info. Free Same Day Store Pickup. If it doesn't work, it does not turn on when I turn the car on, however it may start working 1) If I hit a bump or 2) If I make a sharp right turn. If you know the sequence of operations, you can pinpoint where the. I check around in the fuse boxes and everything looks ok. The mechanic says it is most likely an electrical issue since everything else was replaced and is in working order. Ok, let’s get started on what it’ going to cost to replace that blower motor in your furnace. When I have my fan on, it sometimes sounds like its slowing down and stopping. - I couldn't find any information on this particular problem. AC Blower Motor or Resistor I have a 2005 TR4 and for the last two weeks my AC will stop blowing air for a day or so and then it start working again. Depending on what kind of car you have, it should be a pretty simple fix. DASH AC blower stopped working The blower motor is behind there. It is responsible for controlling the blower motor's fan speed. The next most common problem that can occur with an air handler is a failure of a blower motor whether it be the blower motor or something else that causes the blower motor to fail. (Common Problem-- '99 to 04 Cherokee) In the Cherokees with ATC ( some call it: AZC - Auto Zone Control) The PROBLEM IS THIS: With the ATC System -- The CONNECTOR on the Blower Motor Control Module-- OVERHEATS Resulting in Intermittent OR NO Operation of the Blower Motor!. It has been working off and on but now seems to have quit. A faulty blower motor can leave you freezing or sweating, quite literally. Notice the giant yellow arrow pointing to the location. 9 L Cummins diesel). I have a 2008 5. When it does come on, usually after about 20 minutes of drive time, it blows great. Fan makes a small abnormal noise when running and won't reach the highest blower setting when it is working. A piece of advice: although it's not necessary to remove the blower motor to replace the resistor, it does make access a little easier and it's only 3 bolts. The blower motor works on only one speed. The Air conditioning (AC) system in your Subaru is made up of the following. If all the lower speeds work, but high speed does not work that would be a wiring problem at the connector to the fan motor and/or a bad high speed fan/blower motor relay. It worked for a few days, then the blower motor stopped working again. I recall during my research that others have had random elecrical problems "clear up" when replacing the BMR. If there is no power then the control relay may be bad or you may be missing the signal to the relay. I tested the bottom sequencer but afaik it is good. Anyway it doesn't matter, you called it on both accounts. Impala | Impala SS Car Forums. 10-12 minutes later air suddenly feels cool around 60 F, nice stay chilled air blows from vents. Any help would be greatly appreciated!. If it’s good, refer to a wiring diagram for your vehicle and conduct these tests:. If it's good, refer to a wiring diagram for your vehicle and conduct these tests:. Once it's gets going again it will be fine and work great. the part is an AC DELCO 15-5691 blower fan switch. One of the first symptoms of a bad or failing AC blower motor relay is a blown AC blower motor relay. SOURCE: 2012 Equinox the ac fan works intermittemtly. Sure it worked for a while and then started blowing warm intermittently again. If the motor won't work on high, then it's probably the motor. Yesterday though, the blower didn't work yet again. Once I checked it, it did work but only for couple minutes. I'm having a problem with my Broan Electric furnace lately. Recently though, it's gotten to a point where sometimes, the blower motor would completely stop working. Consult your furnace owner's manual for directions on properly oiling your blower motor and other maintenance suggestions. Front HVAC Blower Intermittently Work in 2012 Enclave No control setting made any difference. Where once again it didn't turn on right away, and if it did it would cut in and out. The blower wheels or fan blades mount directly to the motor shaft, which minimizes the amount of friction created as the motor drives the equipment. We had this same problem earlier in the year and had the only outfit that our home warranty uses come out to look at it. Symptom: Blower motor only works when you're messing with the key in the ignition, turning on to start, or halfway between, or some variation in where your key happens to be at a specific point in time. In my case the only thing affected was the blower motor. Q: The AC blower on my car only works intermittently. You turn on the A/C, and nothing happens. First thing I checked was the fuse, that's ok. Turn van off, restart and everything works again. I recall during my research that others have had random elecrical problems "clear up" when replacing the BMR.