Why does my heater fan only work on a high speed and how do I fix it?
try replacing the blower motor resistor
Answer . \nOn the Mercury like a lot of other cars, what happens is the relay for the fan control goes bad, somtimes you may just have low and high no medium but a lot of the time you just get high speed, thie is also very common on a lot of GM's.. Answer . \nThere is a resistor pack located …on the heater core housing just below the glove box. When this goes bad, the fan will only function on high.\nIt's an easy repair. Just one screw and an electrical cnnection.. Answer . it is called a blow motor resistor it cost about 20 bucks from the dealer itis easy to install just one screw and a plug (MORE)
Resistors control the speed of the AC/Heater fan. These resistors are switched on and off in various combinations to create the different fan speeds. When the resistors burn out your fan will only work on the "HI" setting. The "HI" setting doesn't use any of the resistors and that's why it works. Th…ese resistors are near the blower and the blower is beneath the dashboard on the pasenger side. Just have to located resistors now. (MORE)
Answer . \nThe heater resistor pack is bad. Replace it.. Answer . \nA Blower Motor Resistor burned down and needs to be replaced. It costs about $37 from the dealer and is located on the passenger side underneath the dashboard. It is held there by 2 screws and very easy to change. Common p…roblem with Nissan cars. (MORE)
Defective ballast resistor pack. OTHER : It sounds like it could be the blower motor relay / resistor. I replaced mine today in my 2001 Chevy Impala. It was next to impossible since I heard that the way to get to the resistor was to remove the blower motor housing and repair it that way. …I instead removed the blower motor and got to it that way. The two screws in the back are knuckle busters. Good luck and I hope you have patience or enough money to have someone else repair it. (MORE)
The blower fans on these cars run very quietly on all but the maximum setting- ensure that the fan is really not working first by holding your hand in front of the vent with the fan on low and checking that is it not moving any air.\n Answer \n. \n. \nReplace the resistor pack.
The Blower Resistor is probably bad. If the resistor draws too much current it burns out and the fan will only work on high speed since on high speed the resistor is bypassed completely.. On my 2002 prism this part is located below the glove box. It is usually white with 4 wires and held in by two …screws. It will be obvious when removed if it burned out - it will be chared and the traces broken.. THe Haynes repair manual (at any parts store) shows it in figure 16.4.. Should be a $20 to $30(dealer) part. See: https://www.rockauto.com/applet3.html and type in part #158755 or navigate the file paths. How to Install a Blower Motor Resistor This is an extreamly easy thing to do... Here are clear and simple instructions. 1. Under your glove compartment, you will see a group of wires that are connected into a small, in my case yellow, irregular shaped piece of plastic; this is your blower motor resistor. 2. If you have a ratchet set, this is a 5 min job... if not, I feel sorry for you because you are going to have a hard time taking out the two screws. If you don't have a set, I suggest asking a neighbor to borrow one which will save you a great deal of time. 3. First unplug the wires from the resistor by gently lifting up on the plastic tab that connects them into the resistor. 4. Unscrew the resistors two screws and it should slide right out. You will see that the plastic card is charred and peeling if it is bad. 5. Pop your new resistor back in the slot, screw it in and snap the wires back in... it's just that easy!!! (MORE)
I just replaced mine on a 97 cav z24 on 01/24/09. In the passenger side, remove the bottom panel that is under the glove box. On the blower motor (its circular and black you can't miss it) look for a white plug that connects to it (should be about 1/4 of an inch away from the firewall). The white pl…ug is held to the blower by 2 5.5mm screws. Remove those 2 screws (there is one screw on each side of the plug and opposite of eachother), separate the wiring from it, connect it to the new part and replace it back in. It is a simple procedure thankfully. **You must have some sleek and small tools for the removal of the 5.5mm screws. There is extrely limited room and can't be done with a convential socket wrench or screw driver.** Let me know if you need more help with it. . Answer . the blower motor resistor is at fault.each level of fan controler needs more voltage replacement should be very cost freindly.. Answer . The above answer is correct. It is more than likely the Resistor Pack. They are not that expensive, especially if you can find one at a salvage yard. The hard part is finding it. Try www.autozone.com and look in the component location section. You may find the location there. I would suspect that if you have it replaced at a dealership, it may run as high as $200. Most of this will be labor. Try removing the glove box and look around behind it. Good hunting.. Answer . the location of this part is like all resistors for heating mounts to heater duct box. this being passenger side close to fire wallunder dash with two screws holding inplace close to blower motor (MORE)
Answer . \n99% of the time it is the heater resistor block, it is a bunch of resistors which gives you the different speeds.\nthis is mounted close to the heater motor, pass side of the car.\nUsual cause of failure: water or snow inside the heater housing.
Here are some answers from my 99...it may be the same problem... There is a resistor pack located on the heater core housing just below the glove box. When this goes bad, the fan will only function on high. It's an easy repair. Just one screw and an electrical connection...it is called a blow motor …resistor it cost about 20 bucks from the dealer it is easy to install just one screw and a plug These are from other contributors so they deserve the credit if it helps...I haven't tried the fix on mine yet... Please show exact location for blow motor resistor (MORE)
\n. \n Answer \n. \ntry replaceing the switch that controls the low to high for heater\n. \n. \n Answer \n. \nIt's gonna be the blower motor resistor (near the blower motor).
The blower motor resistor module is ruined and need replacement. It can be found from below and behind the glove box. Tt may be hard to see, follow the wires to connection that is mounted to the blower unit by two small hex-head screws. I removed the glove box so I could access it easier than trying… to go from the bottom in a confined position. (MORE)
1996 Mercury Sable. Heater Fan froze. thawed now only have high speed. Can I fix this. I am not sure where to look. Thanks?
Answer . \nYou probably have water tht has entered the heater case through the cowl air inlet, which has damaged the heater blower resister assembly. It is held into the case with two 8mm screws, and is locatted under the glove box area right beside the heater blower motor. Turn on the blower an…d follow the sound, and you will find the resister assembly right there. I'll bet if you replace the resister assembly, you will have all your speeds back again. (MORE)
Answer . \ndo you mean the speed of the fan? if so, it'a relay generaly near the motor of the fan. If it's the heat who only came at high speed, you need to add some antifreeze.
Your 2002 Dodge Stratus ACHeater blower only works when the fan speed selector is on 4 or High Speed What might be the problem and how do you fix?
All or Nothing Blower . The Climate switch on this model is a "Resitor Switch" which means the full voltage is setting 4 ... 1-3 reduces the voltage making the blower motor go slower... This seems to be a common problem and the only fix is to rplace the switch... However the run around 125.00... …Even though this seems to be a reoccuring problem Dodge does nothing about it except sell you a new switch.... 53K Miles on my 2002 and I am into my 3rd switch now.... Don't bother changing the resistor switch because you will rack up too much money in replacing it every 2 months....I have replaced mine 3 x's now at $22.20 a peice from the dealership. The mechanics at Dodge know that this a problem with Stratus' and will tell you to replace the blower and switch, which in time, you will go through this whole process all over again. Chrysler is well aware of the problem and is not willing to do anything about it because of people like us replacing the part a million times & they continue to make money on it. Live with the fact of having heat and a/c on high for the duration of owning this vehichle! (MORE)
Check the fuse There is usually a separate fuse for the regular and the max fan speeds. Check the manual or fuse box covers for the fuse location and size, then pull it and see if it is blown. merury villager and Nissan quest both use a fan resister located near th blower motor underneath the glove… box. L,M,MH operate on resistors and high speed bypasses the resistor so your resistor plug is burnt out on the first three speeds if you still have high speed.if you have no fan on any speed then you have another problem. (MORE)
How do you fix a AC and heater fan speed control knob on a 2002 Monte Carlo that has stopped working on speed 1?
Answer . Normally this is one of 2 things. Either the speed control switch is bad or the Blower Motor Resistor Pack is bad. My opinion would be the latter.. Additional Answer: . Same Issue: However, Speed 1 & 2 are not working on mine. Replace the entire A/C dashboard Controler.. Heat & Air C…onditioning: Heater & AC Controls :: ACDELCO Part# 1472736 (Control,HTR & A/C 2 Doors; w/A/C FRT MAN/AUX Control) (MORE)
Bad fan blower . Check your switch with a voltmeter for continuity in all positions. Get the electrical schematic to your vehicle to help troubleshoot. The average fan is receiving direct voltage on "High" setting but is slightly cut down in increments on other settings by a resistor or rheostat …network. Hence lower voltage produces lower speed. You more than likely have a bad control switch. (MORE)
Answer 1 . There could be several reasons, but the most common when the fan works on high, but none of the other speeds is that there has been a failure in the fan speed control RESISTOR PACK. At the high speed setting, the 12 volt vehicle supply is fed directly to the fan motor. On all the othe…r speed settings the voltage is proportionally reduced by the series combining of heavy wire resistors.\n. \nThe resistor package is inserted into a rectangular opening in the blower plenum chamber [encloses the heater core, and the air conditoner evaporator coil]. Depending on the vehicle, it may be on the passenger or the engine compartment side of the firewall/cowl. It is normally secured in place with two to four screws, and the wiring harness is connected to the pack with a plug on connector. j3h. (MORE)
More information would be needed to diagnose your problem more accurately, but here are some tips to start: 1) Fans will not work with dimmers. If you have a dimmer controlling your fan, it will only work when the dimmer in is the full intensity position (if at all). You will need to replace the …dimmer with a fan speed control. If one switch controls both the fan and the light, this will not solve your problem, as a light will not work with a fan speed control switch. You will have to settle with a standard single pole switch, a remote switch, or get one more wire between the switch and the fan. 2) If you have a fan speed control switch, but the fan doesn't seem to respond as it should, you may want to pull on the pullchain directly on the fan. If the pullchain is not set to high, your speed control will not work correctly. 3) If #2 or #3 don't apply to you, and you are simply using the pull chain on the fan, you may have a bad switch inside the fan housing, loose or disconnected wires to the fan (unlikely), or simply a bad fan motor. (MORE)
Answer . Sounds like the blower motor resistor is on the fritz. Replace it and it should work. I am not familiar with that model or I would tell you where to look. Usually on the passenger side of the inside of the vehicle under the glovebox area. Hope this helps.
Answer . Mine too. 1996 Chevy K1500. I found the heater speed resistor on top of the heater box behind the dash and it had a open thermal fuse inside it. I got access by removing the glove box door but found it a little difficult to remove. I just soldered a wire around the fuse as I have always… done for this problem in many domestic vehicles. Big Hartz (MORE)
What has happened is your blower motor resisor has failed. When you turn the fan speed switch those settings are resistances that "damp" the blower motor and it runs slower. When this fails, it just has full current to the blower motor. Sometimes these are called block resistors. That likely is the …problem. (MORE)
Answer . Normally when a heater blower motor only works on the High setting, it is caused by a defective Blower Motor Resistor Pack . The fix is to, Replace it. In very rare instances it can also be a defective blower motor speed control switch, but rarely.
How do you fix the fan speed control on 1999 Nissan Pathfinder when it only works at the highest speed?
I'm assuming you are referring to the HVAC fan. Somewhere in the spaghetti mess of wiring going to the fan motor, there is a network of resisters. These are often mounted inside the airduct somewhere near the fan motor, not sure about Nissan though. Where-ever it is located, chances are the problem …is there, or perhaps in the wiring leading to these resistors, or perhaps there is a fuse blown somewhere in the loop. It is also possible that the switch itself could be bad and need replacing. Good luck !! . (MORE)
Sounds like it could be the actaul switch that's used to select the speeds. ADDITIONNAL INFO SEE DISCUSSION PAGE.
Answer . The problem is most likely a bad Blower Motor Resistor. The High setting bypasses the resistors and connects directly to the battery. The lower speeds use the resistor to lower the voltage.. Where is it?: Usually the reisitor is found behind the glove box to the left. Also the wires fro…m the control knobs should lead to the resistor. (MORE)
the mortor is getting worn out some times i have took it out and cleand it out with air and elct-cleaner if that doesnt do the trick i replace it.. The blower resistor may need to be replaced. It is a small part, It is usually located somewhere behind the glove compartment.
There is a resistor/ circuit board near the heater motor that need to be replaced. You can get one from almost any auto parts store.
by the blower motor there is a resistor connection, you will find it melted . the blower motor is bad. it draws to much power causing the connection to get hot and melt and burn. you will have to change the connector and the blower motor. . the blower is still working but its drawing to much power…, the motor windings are shorted out inside. . disconnect the connector from the resistor and you will see it. (MORE)
Could be one of two things. It could be the head/control unit. Or, more probably, the fan resistor has gone bad. Look under the dash on the passenger side. Remove the sound insulator if it is there. Look at the heater box. You should see a rectangular flat flange with either a connector (4 pin, I th…ink) or 4 heavty guage wires coming out of it. It is held in place by 2 screws. Remove and replace. (MORE)
You need to replace the resistor board locate on the inside passanger side where the blower motor is located .. It is attached to the blower motor with 4 screws as I recall and can be readily replace if you are somewhat handy around cars.. The part Iam sure must be purchased at the dealer for arou…nd 35 dollars. (MORE)
This is a very common problem. Most often the reason that a heaterfan won't run on one of the speeds?Ã¦is corroded contacts in thewiring harness.
There are multiple causes as to this condition. There may be a bad switch that is stuck on the high position. The motor itself can have a problem being regulated correctly, for example also.
My 1998 dodge status fan speed on your heater and front defrosters only works on high speed what can be wrong?
It is your blower motor resistor. It is about a $20 part and you can put it in yourself if you are handy. If not, a mechanic will put it in for $25-$50. I have had this happen several times to my stratus.
Sounds like the blower motor resistor. Should be near the blower motor under right side below glove box!
from the basics you're giving, sounds like a bad switch. The cheapest and easiest fix is to go to the library, pick up a hanes manual, study how to remove the climate controls. Grab your tool box and go to a you-pull-it junk yard. Pull the part on a crashed car to give you practice with your own. Th…en do it in yours. However, depending on the type of switch, you could just rebuild the switch by relubricating it and cleaning the contacts. (MORE)
first check if you have power to motor. Key on & switch on.Check if you have power at connecter at motor. If power at the motor-replace motor. No power then check the resistor, The resistor has to have power to it & out of it to motor motor at all 3 speeds. Don't forget to check you fuses first. I h…ave a fuse in my truck in fuse box under the dash & another one in fuse box under the hood (MORE)
The stage 1 relay has blown! it is located behind the glovebox door above the heater blower.. find it . pull it out . replace it . job done:-)
Where is the location of a F 150 Ford 2002 fan motor Mine only works on high speed What needs to be fixed?
mine has the same problem............ We could use some help here................ sounds weird to me.
could possibly be the blower motor resistor. which is generally located on the passenger side under the dashboard by the blower motor.
Unless it is a high efficiency model 14 SEER or greater, it is only supposed to run on high speed in a/c mode and low speed in heat.
Its the fan blower resistor IMO...had this happen already. part is really cheap. Located behind glove box.
Were is heater fan relay on 2002 town country located on vehicle only works on high speed is that due to relay being defective also?
You need to replace blower motor resistor, which is located behind the glove box...easy fix !
Your heater fan only working on high is probably the little coil sensor heater assembly located under the hood, it will be on the far left side of vehicle if your standing in front of it on the side of the air plenum. There is two screws holding it into the plastic chamber and a wire harness which y…ou must unplug. Its right next to the transmission dipstick handle which is probably yellow like mine. I replaced mine for around 30.00 from the dodge dealer and that fixed it. Good luck, hope this helps you! (MORE)
2004 Chevy express van, heater has no high speed, at one time the blower stayed on even when the ignoton was turned off therefor draining the battery,
Usually when the heater only works on high it is because the resistor has went bad. The resistor is what put resistance on the fan to make it work on low, medium, and even off. Since the resistor is bad it only works on high because there is no resistance needed. The resistor part you need should no…t be expensive at all, I just replaced mine in my Jeep Wrangler and it was only 35.00 at Auto Zone I believe. All it is, is a plug that you will put in instead of your old one. It should be back behind your glove compartment or under the lower side if the passenger side of the dash. Good luck! (MORE)
If your talking about your blower motor only working on high its usually your blower motor resistor that has stopped working properly. (The blower motor resistor is an electrical component which limits the flow of electricity to your blower motor, allowing it to spin/blow at different speeds). It is… easy to replace on some vehicles that have easy access to them because all you have to undo is usually two screws/bolts and one wiring connector. (MORE)
Knowing similar fords this is likely a resistor that sits under the dash and burns out from time to time. It's a cheap part from ford and they usually don't charge very much to put them in.
Blower motor resistor is right, reason; The resistor is composed of three individual coils to control current flow. when one of the coils burn out. The current bypasses these resistors and only flows from battery voltage, to motor, to ground......
because u need need to get a different motor right now if it only runs on high the nyou have a one speed motor witch is gonna be on high full time if u change your motor to a 3 speed motor then you will be able to change the speed of the motor from the thermastat one hour a/c and heating lead tech.…... bassed out of baton rouge louisinana please contact if office number 1-800-f*ck off cell number 1-800-b*tch (MORE)