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My fan motor only works on high speed, how do I fix it?

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The resistor is burned out at the fan speed selector switch.

Posted on Oct 12, 2010

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Posted on Jan 02, 2017

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2 Answers

How do I fix heater fan to operate at low and medium speeds. It only works on High.


depending on car some have a fan relay or its your switch itself

Jan 13, 2016 | Cars & Trucks

1 Answer

ON a 2006 HHR LT is there separate fuses for the three fan speeds. The high fan speed is working but th low and medium speeds are not. Where are the fuses located


the fan speeds work through a blower motor resistor and not separate fuses for each speed. when these resistors go bad they are designed to work on high speed only.

Oct 11, 2014 | 2006 Chevrolet HHR LT

1 Answer

2003 jETTA Fan only works high speed. For AC compressor runs but no fan other than when switched to high speed at which time the fan runs at high speed but AC switches off.


a resistor went bad for your blower motor.It is located by the blower motor on a circuit board.You can get the replacement resistor at Radio Shack and solder it in.This fixed my problem

Jun 05, 2014 | 1999 Volkswagen Jetta

1 Answer

Fan control switch only works on high


If you blower fan will only work on high know that most blower motors are power by a basic electrical circuit that utilizes a multi resistor or a solid-state resistor to control different fan speed modes (low, medium low, medium and high). If the resistor malfunctions it may lose one or more of the lower fan speed settings. First check the fuse and change if needed. If that doesn't fix things change the resister.------------------------------------------------------------------------------------
Launch CResetter Oil Lamp Reset Tool

Mar 07, 2013 | Cars & Trucks

2 Answers

Blower fan not working


The resistor bank is bad for slow speeds, the switch is bad for high speed. In your test, you have voltage, but the switch wont carry the amps, to run high speed. Open circuits will not blow fuses. Replace both switch and resistor bank for all speeds. Make sure to clean leaves and trash from fan housing and see if fan spins freely.

May 17, 2017 | Cars & Trucks

2 Answers

Only high speed works on fan motor


This condition is caused by a defective blower motor speed control resistor. The resistor is located right next to the blower motor with the connector end sticking out of the ducting for the AC/Heater system. Very easy to replace and the part is cheap as well.

Jul 06, 2012 | 2002 GMC Sierra 2500HD

2 Answers

Heater blower stopped working?


Hello,
You may want to try your fan on all speeds. If it will work on high, you have a bad resistor for the fan motor. ( high speed doesn't go through the resistor ).
If it doesn't work on any speed, I would check the following;
1. Make sure the fuse isn't blown for the fan blower motor.
2. Check, or have checked the wires between the fan control switch and the fan blower motor.
3. Have the fan control switch checked.
4. Have the fan blower motor checked.

I hope this helps you.

Feb 03, 2011 | 2002 Buick Rendezvous

1 Answer

Cool fan low doesn't work. Doesn't appear to be


It needs to have the blower motor resistor card replaced.
It still works on high speed because on the high setting the voltage does not go through the resistor.
The resistor is mounted beside the blower motor and is easy to replace.
There you are, thank you for using FixYa.

KL

May 01, 2010 | 2003 Saturn VUE

1 Answer

I have a 1996 blazer 4x4. The heater fan is making a growling noise no matter what speed it is running at or which position the vents are at... i.e. defrost, floor, etc. I believe the resistors are burnt...


well the growling noise is more than likely a worn bearing in the blower motor it would be better to replace the whole motor, and on the fan speeds the blower motor resistor is the cheaper solution to take and more likely however if the resistor doesnt fix it then look at the control unit in the dash as the problem but like i said more than likely the resistor will fix the problem

Oct 19, 2009 | 1996 Chevrolet Blazer

1 Answer

Fan on High Only


The fan motors use a set of resistors to control fan speed. The lower speeds generate more heat in the resistors and these tend to burn out. While it is possible the switch could be the issue, I would start with the resistors. It is usually a module located somewhere near the blower motor.

Note: One of the reasons these go out, is that with time the bearings on the blower motor go bad and the motor takes more power to run. If the replaced resistors fixes the problem, but then fail too soon, look at replacing the blower motor as well.

Aug 29, 2009 | 2005 Ford Excursion

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