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Would the bad blower motor cause my aux fan to burn up

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2 Answers

My 2006 blower fan switch only has a high. As soon as I turn it on it goes to high. Would this also be the relay?


this sounds like a bad blower motor resistor board that has gone bad. they are designed to work only on high if they go bad so you will still have the blower to defrost the windows.

Sep 10, 2014 | 2006 Nissan Titan

1 Answer

Heat or A/C does not work in my car?


Either you have a blower motor FUSE that has gone bad "typically the problem" or you have a burned out blower motor. Usually the cause of a blown or burnt motor if not a Fuse, Is caused by the vented air from outside letting debris like sticks or leaves,acorns etc. enter the fan box. If ANY of the mentioned items get caught in the "blower box" then it will usually blow the fuse and or burn up the blower motor. Start in your fuse box and look for a burnt fuse and replace with same size fuse. If it blows the new fuse quickly then you have debris in "Blower box" that will have to be removed before adding yet another fuse. I have had the same problem and I found a bunch of leaves in my "Blower Box". I removed the leaves and replaced the burned out fuse. And I have had no more problems with the blower motor blowing air.

Nov 09, 2013 | 2004 Ford Taurus

1 Answer

Heater fan not working


The three most common problems for heater fans are
  1. Burned-out blower motor resistor. This is usually located on the engine side of the firewall. Sometimes one section of the resistor is burned out but others are still good, so the blower only works on the highest speed settings. If you have a burned-out resistor, check the blower bearings to make sure they are not stiff and causing the motor to draw too much current.
  2. The blower is actually working, but either the intake vent is plugged (I've seen vehicles with the heater core completely blocked by dirt, leaves and insects that came in through the vent), or the heater door is stuck closed.
  3. The motor bearings have gone bad (see # 1). This can cause the fuse to blow, although the resistor usually fries first.
I'm not sure how your car's cabin environmental control system is fused. Check any fuse that might apply, such as Vent/AC, HTR, FAN, etc. Generally you can identify the state of a blade-type fuse by inspection without removing it. If you have a blown fuse, check the blower motor before wasting money on a new fuse that will probably blow. Like any fan, it's supposed to turn easily, and there should not be any roughness or side-slop in the bearings.

Nov 14, 2011 | 2004 Renault 181

2 Answers

My 2004 grand marque's blower motor stoped working is it the blower motor relay or the resister?


If 1, 2 & 3rd speed not working, it is resistor (assuming you don't have EATC). High speed will work if fuse is ok and resistor is burned.
EATC = Electronci Auto Tem,p Control (Digital)

Nov 10, 2010 | Mercury Marquis Cars & Trucks

3 Answers

My 05 grand cherokee's ac only works on high setting.The fan does doesn't work on any other setting whether the ac is on or not. What could be the cause of this problem.


There is a blower resister module in the blower case,near the blower motor that is bad,what causes this is a bad blower motor,it may run good and sound good,but it is drawing to many amps,and is burning the resister out,this is your speeds.If this was at all helpful,please rate,and thank you.

Jul 06, 2010 | 2005 Jeep Grand Cherokee

1 Answer

A/c doesnt work on low fan


There is a blower motor resister that has gone bad,also check the blower switch on the back,the connection could be burned ,the blower motor causes this to happen,even though it sounds ok,it is drawing to many amps.

May 20, 2010 | 2000 Ford Focus

1 Answer

I have a 1995 jeep cherokee sport 4wd 4.0L with air ps/pb/cc/abs. I recently (2 weeks ago) lost all ac/heater blower speeds except high and now 2 of the wires to the ignition switch get so hot with the...


Never just replace any item because someone suggested it may have failed. Before replacing anything, you need to check each item for any signs it's bad. In addition to what I mentioned, the blower motor itself can also cause a problem if it is worn out and is drawing too much amperage to operate. If the blower makes any noise or the wiring becomes warmer than it should be after replacing any damaged parts, look at the motor. Bad motor ground can cause problems as well so check that too.

May 18, 2010 | 1995 Jeep Cherokee

2 Answers

HVAC Fan


new blower motor is the most likely cause

Dec 14, 2009 | 2006 Hummer H3

1 Answer

Where is the front fan resistor unit?


Look under the van,on the drivers side near the radiator,it should be in that area.Follow the wires from the fans,they should go right to the module.This is for the cooling fans for the radiator.For the resister module for the blower motor look near the blower motor in the blower box.It is near the blower fan.It can be under hood,but it will be mounted with two screws.Remove the two screws,but you need to remove the wire plug in first.Pull it out .It goes inside of the blower box.If you replace this module,replace the blower motor also,because the blower motor is what causes the resistor to burn out.Did you check voltage at fuse with key on?If you did not check the fuse with key on,you got a false reading.If you checked the fuse with key on,look for a bad ignition switch,or a fusible link burned into coming off a pos. terminal post where the battery cable goes to under the battery.If the blower will not work at all even on high blower,the resister most likely not the resistor.The blower motor relay is most likely the problem.

Aug 29, 2009 | 2005 Dodge Caravan

2 Answers

Blower fan resistor module replaced, worked for 2 days quit again


HIGH RESISTANCE IN THE BLOWER MOTOR CAN CAUSE YOUR PROBLEM, OR A BAD RESISTOR.
THERE IS NO REAL GOOD WAY TO CHECK THE RESISTANCE OF THE BLOWER MOTOR.

Jul 16, 2009 | 2005 Chevrolet Malibu

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