Question about 2003 GMC Envoy

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Lower 3 setting on heater fan quit working.

Lower 3 settings on heater fan quit working. I checked for fuses could not find one just for lower settings. And just resently my rear wiper quit also.

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  • Anonymous Mar 16, 2014

    Replacing fuse did not help

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  • 1,201 Answers

Have the block resistor checked for the fan

Posted on Jan 21, 2009

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2 Answers

Fan motor on heater has stopped when I switch between the settings ( defrost to upper & lower heat) I hear the gates moving but the fan won't come on ( no heat ) it's very cold please any sugestions...


first check the heater fuse...then you want to unplug the fan motor lead and run it straight to the battery...if it works then you will need to check the resistor assembly..it is located on the heater housing right near the fan..it controls the different speeds for the fan and usually has 4-6 wires coming off it. If these don't fix the problem...try looking in the fuse/relay box both in the cab and under hood to see if you have a relay for the heater fan...as it may be defective

Jan 08, 2011 | 2001 Jeep Cherokee

1 Answer

My 2003 saab 9-3 fan for my heat and AC stopped working, what could possibly be the problem? My car was just snowed in 3 feet of snow, so could the negative temperatures and snow be affecting it?


Quite possible that the fan has quit due to the lower temperature as the thermistor is set Up. Now this can be confirmed once the car is warming up to go beyond the set engine temperature.
So unless this is confirmed all that you need to do is to check if there is a fuse link break to the fan motors.

Dec 13, 2010 | 2003 Saab 9-3

1 Answer

The fan for my Heater and A/C only works on the


there is a resistor for controlling the speeds and it needs to be replaced

Apr 27, 2010 | 2004 Chrysler Sebring

3 Answers

Subject: 2004 isuzu rodeo...my ac/heater blower is not working


The resistors are in circuit only on the lower fan speed settings.
On the highest speed setting, power is switched directly to the fan motor.
Check fan power supply fuses,
Check power is available to the fan when high speed selected.
If all above OK, apply power directly to the motor to verify fan motor runs- if it doesn't the motor may need replacement/repair.

Jul 29, 2009 | 2004 Isuzu Rodeo

1 Answer

'88 Camry AC buttons not working


fan speed controler could be bad, fan motor rellay could be bad.

Apr 14, 2009 | 1988 Cadillac Sedan DeVille

1 Answer

2003 GMC Envoy lower 3 heater fan settings quit working.


had same problem on my XUV. changed the blower motor resistor, located under passenger side dash. easy to change, works no problem.

Jan 20, 2009 | 2003 GMC Envoy

1 Answer

Ac & heater


Disconnect the wire from the fan, turn the car on, test the voltage between the connector to ground (chasis) on all fan speed settings (high,med,low). If you have voltage at all settings (approx. 12.3V on high and less as the speed setting is lower) then replace the fan motor (about $50 at autozone). If there is not voltage on all speed settings you will also need to replace the blower motor resistor (about $12 at autozone). The whole process takes about 20 mins.

Oct 09, 2008 | 1999 Oldsmobile 88

1 Answer

2005 jeep grand cherokee 4.7 Ac fan lost the 3 lower settings, only the high setting still worked. For a while the lower fan settings would just come on, and then go out again. The high fan setting...


Well, the blower resistor handles the lower speeds and the hi-blower relay handles the hi speed only. if the fan still works on the lower speeds then the resistor is bad. if the fan doesn't work at all then your motor has failed and or burn't the relay out also. if you can get your blower to start by hitting the kick panel above the pass. side foot area then the motor is bad. if you are handy enough to drop the kick panel and access the motor then check the connections at the motor. Then wack the motor and see if it comes on then. you will most likely find the problem if you follow those simple rules above. Good luck.

Jul 31, 2008 | 2001 Jeep Grand Cherokee

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