Hvac Blower Motor Works Intermittently

The furnace sounds like it's running intermittently: Check the air filter first. Here you can see the blower motor and the blower motor resistor. Sometimes it works, most times not. Replaced the motor, did not correct the issue. It seems that when it's really cold, the turn signals and A/C blower motor don't work. The blower motor resitor pack is defective and needs to be replaced. Sometimes it won't turn on at all. Extra energy is required to power the blower, so it's connected to a capacitor that works like a battery. If you know the sequence of operations, you can pinpoint where the. Many owners are having problems with melted electrical connectors that stop the flow of power to the blower motor. Advance Auto Parts- RU872 $17. My question, what does the schematic look like for this motor? It's a 3 terminal motor so I suspect it has an. Have replaced blower motor resistor, blower motor, TIPM, taken out entire dash to look for loose wiring. Front blowers don't work when back ones do. Ordered a replacement and 2day air shipment, hey it's hot in Houston right now, for $257. The Air conditioning (AC) system in your Subaru is made up of the following. OK, got big red out of the body/paint shop a week or so ago. Some times it comes on and some times it doesn't. Four different mechanics and dealers have looked at the problem. Replace the blower. AC stopped blowing, but outside air still came in at HWY speeds cold. 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. Have you tried to spin the motor. Not sure my wife drives the vehicle and we live in a warmer climate. Today I want to give you a basic Sequence Of Operation for a standard gas furnace aka 80% Efficiency furnaces. This continues to work. Sometimes it works fine for a while but this morning it didn't want to turn on. This happened several times until it finally stopped working this past week. Replaced the blower motor resistor. then 1-4 work intermittently then not at all. As similar types of fan motor assembly appear on many Mercedes models the replacement of the carbon motor brushes is much the same across the range once the motor is removed. Replaced the blower motor and resistor with no change. 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. Cost of a new resistor card is about $12 from AutoZone, etc. Resistor looked burnt and cracked so I'd a. Start capacitors possess a very large capacitance value for their size and voltage rating, and as a result, are only intended for intermittent duty. I would suggest that the next time the blower does not come on to turn the power off to the furnace, take the furnace door off and lightly feel (touch) the blower motor to see if it is hot or not. 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. Well if you mean that the air only blows intermittently then you probably have a problem with your blower motor. 2) The highest speed does not work-it stays the same speed as the 3rd position. It is responsible for controlling the blower motor’s fan speed. The thin card type Ford blower motor resistor is the most common part used for the interior fan speed control. In this video, we look at intermittent blower motor function on a Ford Expedition but will be the same for similar F150's. then engages turn it back to auto waits approx 90 sec shuts off. 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). Hopefully, the blower motor simply blew a fuse. Blower motors can go bad as well, though they usually won't work on start-up, rather than stop working while running. Direct-drive blower motors drive the blower wheels or fan blades in blowers and other compatible HVAC equipment. Start capacitors possess a very large capacitance value for their size and voltage rating, and as a result, are only intended for intermittent duty. Blower motor works intermittently. Thanks for your question about your AC. It could be a bad relay, control board, run capacitor or the blower motor itself. Anyway-- her FRONT blower motor has been intermittent the last few weeks. Thanks Bennie: My problem is that now the blower motor doesn't work at all now so it has regressed from the working every once in a while. Ok, let’s get started on what it’ going to cost to replace that blower motor in your furnace. Its imporant that the cable makes contact otherwise it will simply not work. I would check into the Blower Motor Resistor. Back in the 70s and 80s blower motor problems with General Motors Corp. I am leaning toward ordering one. I've read something about the resistor and or the blower motor. It may be the plenum or metal box. However, nowadays it is all done electronically, and the electronic controls vary in many different ways. I have struggled with my heat/AC for a few weeks now. Blower motor intermittently struggles to come on [ 1 Answers ] Hey Folks I know this a rather common issue, but there are several variations on it that make me unsure which way to turn. I have 2 issues: 1) The blower motor intermittantly cuts out. 2 months ago, the A/C became intermittent (very cold air when working), then progressively, the times it worked tapered off and now the A/C does not work, other than to blow hot air. I can still feel heat and cold coming through the vents when I turn the AC on, but the it doesn't always blow air. 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). The blower motor always comes on when requested either via the Cooling request from the t-stat or if I move the Fan to "On". Normally when the blower module fails, it will not cause intermittent blower function. Today the blower for the htr ac just stopped working. Then say, "Bite Me". it actually reinforces that it can be resister by working intermittently. Ever since then, the front blower motor giving me a problem. Now that you understand what it is, now we can discuss how to properly troubleshoot the X-13 motor. 2002 Deville - I have the intermitant problem both on AC and heat, blower works when car is cold, but stops working aftecar has heated up (both winter and summer). When this happened, the customer said that the Electronic Throttle Control, ABS, Traction Control, and sometimes the 4WD lights would come on. Blown fuses. Typically it is the fan motor, or associated moving parts. I took apart the glove box and dash pieces to get to the blower motor itself to diagnose the issue. The different blower motor did nothing. Replied by K24A4 on topic Intermittent AC Failure (2008 Saturn Vue XE) Work and travel has kept me from being able to work on this problem - but the car has "acted up" the past two days. My landlord had an HVAC tech come out and of course it was working perfect the day they showed up. It doesn't appear to matter which blower speed setting it is on. Replaced the relay. AC light & recirc light still light up and AC compressor clutch engages when turning fan on in AC mode, but not getting the fan to work. I've checked the fuse in the dash fuse panel and it is good. I tried to get my wife to bring the car directly home from work today, but she has a class at the gym. It seems to have this problem only with the ac. If you are trying to reduce the furnace noise, you can cut down on the sound coming off of it by insulating the furnace room walls with rock wool. They drive Explorers, and of course the officers have the heat or AC running all the time. Plugged it in and the blower spun up while sitting on the floor. Heater/AC blower motor operates intermittently! When it does come on, it blows strong and with plenty of air, but I don't know if it is the regulator or if the motor. Gas that enters the furnace is ignited by the pilot light. When it kicks down, it usually only lasts a few seconds and then goes back up. When fan. When it does work all fan speeds work. The connector on the blower motor RELAY is the most commonly overheated/damaged connector,. Fan motor intermittently stops. Sometimes the blower motor doesn't want to switch on. One horsepower is equal to 746 watts. 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. Anyway-- her FRONT blower motor has been intermittent the last few weeks. My question, what does the schematic look like for this motor? It's a 3 terminal motor so I suspect it has an. Replied by K24A4 on topic Intermittent AC Failure (2008 Saturn Vue XE) Work and travel has kept me from being able to work on this problem - but the car has "acted up" the past two days. Resistor looked burnt and cracked so I'd a. Items 2 and 3 are the ground circuit for the blower motor. First of all, the fan is intermittent. Super hot where I live in FL right now and need my blower motor and AC blows cold fortunately which would be a bigger issue if it didn't. I just dont know how to tell which part to buy. So i got back under my dash and pulled the motor and tested all my connections and the voltages again. A compressor, Condenser, Evaporative (Evap) core, Expansion valve, receiver dryer, hoses and lines, thermo sensor and the controls. Goodman heat pump blower intermittent failure in ac When the tstat is set to on evap. I have a new blower motor, interior fan switch, resistor, and AC components. Ordered a new resistor to replace when I got around to it. 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. 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. 4 Steps To Troubleshoot Furnace Blower Motor Fan And Repair Replacement Guide When it comes to the cooler months of the year, heating becomes essential and if, after not being used for some time, you go to turn on your furnace heater, only to find that no heat or air comes through the vents, then, as explained in the HVAC Blower Motor Guide. All for the same problem. Fortunately, it is a relatively easy problem that can be fixed in your own driveway. [Air Conditioning] Blower Motor or Blower Motor Resistor Ive been having a intermittent issue. The fan will not work if the AC is on and the fan direction selection is not set correctly (like defrost). Find out where the power stops. The blower motor controls air flow into the passenger cabin in conjunction with the blower motor resistor (final stage). Sand, pollen, and dust from the air may clog the blower motor, especially if you don't remove them regularly. When it works, it works great. In order to know which is at fault, you will have to either install a new final stage unit and see if the blower works, or test the blower before replacing any parts. Does this in heat or ac. The heat is wired to the "medium" speed setting on the blower motor. this would cycle about. This definitive guide to Ford Fusion blower motor problems walks you through diagnosis and repair of 3 separate issues affecting blower motor operation. The components in your Jeep receive stable electrical power thanks to the fuses that regulate them. Whener the AC works I here rge compressor turning on with a "Thud". 2002 Deville - I have the intermitant problem both on AC and heat, blower works when car is cold, but stops working aftecar has heated up (both winter and summer). It works for a while, turn off the engine then when I come back, it stops working. At any rate, on my climate control, the blower works only intermittently. It's located inside the dash, often on the opposite side of the steering wheel or inside the engine compartment on the firewall. 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. the motor has an internal overload that shuts it down if it gets to hot or pulls to many amps. The highest blower speed usually bypasses the motor resistor completely, so it’s not a suspect if the motor doesn’t work at any speed. Blower Fan Stops Working Sometimes. It worked for a few days, then the blower motor stopped working again. Seems to be improved by jiggling the wires under the dash. You will see a motor sitting on top or next to a larger blower wheel connected by a fan belt. I recently started having trouble with my ac not working right. Then check your oil supply and filter. This left the three screws holding the blower motor up, not the Phillips head screws, those are just for the cap. Today it did it again, I pulled the blower motor out of the dash and it was working, but about 6 inches from the blower motor towards the driver side the duct work was cold-condensation and it seems that blend door is not working properly. Some times it comes on and some times it doesn't. The fan will not work if the AC is on and the fan direction selection is not set correctly (like defrost). The front AC Blower is not working. Buy Upgraded Design Heating and Air Conditioning Blower Motor Resistor AC Blower Control Module for Buick Cadillac Chevy GMC Oldsmobile # 4P1516 MT1805 RU-631RU-631 JA1639 BMR34: Blower Motors - Amazon. It could be a bad relay, control board, run capacitor or the blower motor itself. 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. 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. If you start at the blower motor, and check resistance in the circuit, you will find the problem in no time. I figured it was the blower motor itself, so i went and got that replaced, and it worked up until this morning. Check out free battery charging and engine diagnostic testing while you are in store. The original resistor based blower motor control, was a simple resistor winding arrangement, and was cooled by the air conditioning air stream. My niece's '98 worked on 3, 4, and 5 only. If it isn’t on, turn it on, and wait for the furnace to engage. The Heating Ventilation and Air Conditioning (HVAC) blower motor is located at the top of the airbox under the black cowl cover at the base of the windshield. It doesn't appear to matter which blower speed setting it is on. I purchase a new fan motor, unplugged the wire harness leading into the current (Mounted) blower and plugged into the replacement motor. I check around in the fuse boxes and everything looks ok. The heating elements are working because I can feel the heat from the furnace but the motor does not. I've read something about the resistor and or the blower motor. Sometimes the motor will quit running for up to a minute. I tried to get my wife to bring the car directly home from work today, but she has a class at the gym. Buy Goodman GMH80803BN 80,000 BTU Furnace, 80% Efficiency, 2-Stage Burner, 1,200 CFM Multi-Speed Blower, Upflow/Horizontal Flow Application. It is the "brushes". 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. Sure it worked for a while and then started blowing warm intermittently again. If it isn’t on, turn it on, and wait for the furnace to engage. Any guidance to the resolution of this problem would be greatly appreciated. The thin card type Ford blower motor resistor is the most common part used for the interior fan speed control. Would be easy if the entire dash was removed. A common symptom of a failing final stage unit is the blower motor not operating in accordance to how the controls are set, as if the blower "had a mind of its own". 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 figured it was the blower motor itself, so i went and got that replaced, and it worked up until this morning. I have a 2006 Dodge Ram 2500 (5. I have 2007 Civic 4dr with an A/C blower motor that works only part of the time. Some times it comes on and some times it doesn't. It fits almost all of the truck and sport utility vehicles like the Ford Escape, Expedition, Explorer and Lincoln Navigator from 1999 through 2012. Now it will not come on at all. ran a ground wire from a chassis ground to the blower motor and it works fine. but once there you can't change it at all. I've checked the fuse in the dash fuse panel and it is good. The blower motor itself does not create the heat; rather it blows the heated air created by the furnace through the system's ductwork. OK, got big red out of the body/paint shop a week or so ago. Here is the opportunity to submit our central air conditioning problems. While driving with my so called not working blower, it kicked in! Made me slightly more happy knowing that it kinda worked. Next, he checked the HVAC blower circuits and found the HVAC fuses were not getting battery voltage. I have a Bryant furnace (6 years old) and the original blower motor was replaced, along with the fan wheel, about 2 years ago. Normally when the blower module fails, it will not cause intermittent blower function. There are few things to inspect and confirm before you directly replace blower motor. I have a York Diamond 80 furnace and the blower motor is working intermittently. I purchase a new fan motor, unplugged the wire harness leading into the current (Mounted) blower and plugged into the replacement motor. Furnace works intermittently. When I typed a description of the problem in my favorite search engine, the number one result said. Problem: The customer said the heater and air conditioning blower does not work. If the fan is not working I can hit under the passanger side dash and it will start working. Sometimes you turn the car on and it won't work and then later when you are driving it comes on. (NOTE: older style resistor from OP). Sometimes when it is not blowing, I turn off the ignition and turn it on again and the blower will work. A/C Blower Intermittently Working - not transistor or motor. Here is the opportunity to submit our central air conditioning problems. com FREE DELIVERY possible on eligible purchases. blower motor running backwards; If that doesnt work, just yell real loudly, "Hey blower, turn around". Notice the giant yellow arrow pointing to the location. Submission Guidelines: First search the links below for specific info. This is an aftermarket part that replaces factory OE. When working all the functions work correct - fan only, AC/heat, and bi-level. Make sure you have the right wires and motor and you should have your heat and AC working consistently in no time at all. The mechanic says it is most likely an electrical issue since everything else was replaced and is in working order. Back in the 70s and 80s blower motor problems with General Motors Corp. 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'. I can still feel heat and cold coming through the vents when I turn the AC on, but the it doesn't always blow air. Fixed the problem. I've owned my 2005 Grand Cherokee for about four years now, and I've had to replace the blower three times now. HVAC Blower Motor Connector by Dorman®. It works for a while, turn off the engine then when I come back, it stops working. Blower motor works intermittently, HELP! My 98 750 heater blower motor works when it wants to. When working, it rarely shuts off unless I turn the dial to off or shut the car down. only sold online, part houses don't list this item in a search. I noticed that, intermittently, the blower motor will kick down from the speed its at to a very low speed mode. They will draw from the same evaporator, so the system is working. TJ Wrangler blower harness melted On 1997-2006 Jeep Wranglers (TJ's) the harness that plugs into the back of the control head will burn up. The different blower motor did nothing. OK, got big red out of the body/paint shop a week or so ago. Furnace works intermittently. I know the mechanic I am taking it to is reputable (and he specializes in a/c repair) -- I made sure of that -- but I also realize my ignorance when it comes to car repairs puts me at a disadvantage. Intermittent electrical problems can be tough to isolate sometimes. HVAC [Archive] - Diesel Place : Chevrolet and GMC Diesel Truck Forums Diesel Place : Chevrolet and GMC Diesel Truck Forums > Speciality Forums > HVAC. 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. Sometimes when I start the car it turns on, and sometimes it doesn't work at all. The Grand Cherokees seem to have a chronic problem with the blower motor in the heating and air conditioning system, where the bearings slowly go out and start making noises. Front HVAC Blower Intermittently Work in 2012 Enclave No control setting made any difference. Will either replace it or, in the interim, will have to grease the shaft of the motor. She will have the blower motor running and it will just quit, then cycle back on again maybe a moment or two later. Pull glove compartment out. So, the front blower motor in my 2011 Flex Limited started acting up a few weeks ago. A compressor, Condenser, Evaporative (Evap) core, Expansion valve, receiver dryer, hoses and lines, thermo sensor and the controls. 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. Intermittent Operation Of Blower Motor. Trane xl80 blower working intermittently. HVAC systems circulate air through cold copper coils to. If the fan only works on the highest setting then it sounds like a blower motor resistor. 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. I'm having a problem with my Broan Electric furnace lately. Keep the blower motor clean. The airflow from an Audi A4 Blower Motor is then used to heat up or chill the atmosphere in the car or truck. This has been a problem with the Chevrolet Colorados. The fan speed can be changed either by switching the blower resistor resistance mechanically, using a rotating lever, or electronically by the air conditioning system. And sometimes ill turn on the ac and the blower wont even come on. The blower motor works on only one speed. Sometimes on all speeds, sometimes never, but never just on high which would indicate a blower resistor module. Maybe for minutes, maybe for days or weeks. At any rate, on my climate control, the blower works only intermittently. It started intermittently squealing, then quit the day before the replacement showed up. Intermittent Operation Of Blower Motor. txt) or read online for free. and the blower motor switch and resistor is changed as one part and that is the resistor you were looking at, that's all. Knowing how to troubleshoot and diagnose problems with these motors is an essential skill an HVAC technician must possess. What causes heater and AC fan motor to quit working on Chevy blazer? 1995 Chevy blazer heater blower will not work replaced it with a new one and it still will not work?. I have been having an issue with I guess the blower on the air conditioner on my 2004 mustang. I noticed that, intermittently, the blower motor will kick down from the speed its at to a very low speed mode. 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. Q: The AC blower on my car only works intermittently. Jump to Latest Follow. Note that intermittent operation of the blower motor without any of the above symptoms is likely related to a faulty HVAC blower motor relay or the blower motor itself. Blower motor fuse blown/exploded. My niece's '98 worked on 3, 4, and 5 only. Intermittent Bad Ignition Switch Causes Low Power and No Blower Motor. When it works, it works great. Yet, when published efficiency ratings for new furnaces and air conditioners are computed in the laboratory, the efficiency of the blower motor isn’t included in the calculation. I have a 2003 V70 wagon. It will come on fine when set to "Auto" when cooling, but when heating, the furnace will just burn gas and never blow air. Did not need a manual. 2018 intermittent blower motor issues Starting the last week the blower motor on the ac/ heat won’t work sometimes. com FREE DELIVERY possible on eligible purchases. Will start/stop when hitting a bump in the road, or kicking the left side of the panel above your feet on the passenger side. I have 2007 Civic 4dr with an A/C blower motor that works only part of the time. Ordered a replacement and 2day air shipment, hey it's hot in Houston right now, for $257. The blower motor speed is adjusted via the HVAC control panel through the blower motor final stage. i was scouring google for solutions at the time so i could be associating damn near anything with the BMR. Since power is equal to torque multiplied by speed, horsepower is a measure of a motor's torque and speed capability; e. Heater(blower) works intermittently. YOU MUST HAVE THE BLOWER MOTOR FAILING TO RUN AT THE TIME YOU DO THIS TEST. But, my question is;. 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. I've owned my 2005 Grand Cherokee for about four years now, and I've had to replace the blower three times now. Depending on what kind of car you have, it should be a pretty simple fix. When working, it rarely shuts off unless I turn the dial to off or shut the car down. I know the mechanic I am taking it to is reputable (and he specializes in a/c repair) -- I made sure of that -- but I also realize my ignorance when it comes to car repairs puts me at a disadvantage. Did not need a manual. Find out where the power stops. Did not notice how poor the blower performance has become till I replaced it. Ok, let’s get started on what it’ going to cost to replace that blower motor in your furnace. I say blower motor. The term "variable speed" refers to the furnace's indoor blower motor, which moves at different speeds to precisely control the flow of heated and cooled air throughout your home. I'm having a problem with my Broan Electric furnace lately. Loss of fan - blower motor (hvac) high speed operation failure. Sand, pollen, and dust from the air may clog the blower motor, especially if you don't remove them regularly. The rear HVAC blower and controls work fine. Back in the 70s and 80s blower motor problems with General Motors Corp. When this happens the inside of the Jeep will smell like burnt rubber and the a/c blower may not work. Thankfully, testing the blower motor resistor is not that hard and in this tutorial I'll show you 4 different tests that will help you troubleshoot it and find out if its bad (or not). HVAC systems circulate air through cold copper coils to. Shut down the furnace, check the belt, and put just a few drops of electric-motor oil in any oiling ports on your firing assembly fan (some sealed units run oil free, so you may not have ports). Front HVAC Blower Intermittently Work in 2012 Enclave No control setting made any difference. Sometimes the motor will quit running for up to a minute. Intermittent Operation Of Blower Motor. I picked up a modern 1/6 hp motor and a belly band, and, many small adjustments later (with no shortage of cursing. 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. But can be moved back and forth to work around it. 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. The motor that runs the fan in the heating and air conditioning system in a car is called a blower motor. I have a 2000 Honda civic ex. Anyway-- her FRONT blower motor has been intermittent the last few weeks. 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. If you don't hear the blower motor engage as you turn on the A/C, then it is likely shot. Replaced the motor, did not correct the issue. Typical Subaru Air conditioning Problems explained. 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). After a few weeks I put the old blower motor resistor back on and it actually started working again. then 1-4 work intermittently then not at all. The blower motor resitor pack is defective and needs to be replaced. Cleaning your furnace fan thoroughly may not be as hard as you think. Other times it doesn't. Either you have a problem with the wiring where sometimes someting doesn't make good contact and your blower motor cuts out or internally your blower motor doesn't make good contact. The resistor (module) is located next to the blower housing and the wiring harness is connected to the blower motor. This Honda Accord is having trouble with the HVAC blower motor. need some guidance on how to check to see if its relay, resistor, or blower motor itself. 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. A blower motor resistor or a blower motor control module is the part that controls the speed of the blower motor. When fan. Re: Intermittent blower motor operation Nov 07 2016, 11:01pm Well I have the blower motor resistor on the way from Amazon, and I have some fancy aviation electrical contact cleaner, so I'll try replacing the resistor and cleaning the rheostat and see how that works out for me. When it comes to your Ford Explorer, you want parts and products from only trusted brands. Sometimes the blower motor doesn't want to switch on. Mt daughter has Hondacare so we will keep taking it back until the problem is rectified. It may be the plenum or metal box. 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. The one in the console for the rear, works as usual. (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!. Blower motors can go bad as well, though they usually won't work on start-up, rather than stop working while running. Blower Motor Power Transistor Circuit Descriptions. Have replaced blower motor resistor, blower motor, TIPM, taken out entire dash to look for loose wiring. While driving today blower motor Kicked out, I turned up the fan speed and it kicked back in. Where once again it didn't turn on right away, and if it did it would cut in and out. Blower motor works intermittently, HELP! My 98 750 heater blower motor works when it wants to. It seems like the furnace does kick on occasionally, but the fan will not. Not sure if this is a problem with the blower fan itself or the climate control unit.