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Heater motor gremlins

USE THIS FORUM FOR ANY ELECTRICAL QUESTIONS SUCH AS WIRE COLOR CODES, BLOWING FUSES OR WIRING SHORTS.

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astrojohn
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How many wheels are on an Astro van? (4): 4

Heater motor gremlins

Post by astrojohn » Fri Aug 14, 2015 12:40 am

I have a 2002 Astro AWD, with 114000 miles.
The heater motor is giving me fits. Sometimes when fan speed switch is on high, the fan blows on high. Other times it runs on a medium speed. When I turn the fan speed selector to low, and gradually turn up, till it gets to high, it seems like it works, but I don't get the air speed out of the vents.
Anybody got an idea what I should look for, or start looking? Thinking it's the motor itself, but don't want to change unless I have to.

Captn. Crunch
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How many wheels are on an Astro van? (4): 4
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Re: Heater motor gremlins

Post by Captn. Crunch » Fri Aug 14, 2015 1:00 am

It's usually the blower motor resistor. Change the motor, resistor and squirrel cage all at once. Easy job and not expensive. If the resistors going its usually the first sign the motors going. Tutorial vids on YouTube. Let us know how you make out
Captn. Crunch
"I don't beat my rig-I use it to it's maximum potential"
1994 Safari conversion (sold) and miss'n it!
1999 Safari SLE AWD junked
2003 GMC Safari AWD SLT
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