Chevy Astro
Heater Cores and Blower Fans

Why might blower fan quit on 88 astro van It had been running on high only then got intermittent A tap on the motor would sometime start it Reads 12vdc at lead and ground at all speeds Runs sometimes?


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2008-06-21 12:42:01
2008-06-21 12:42:01

I think the problem is with the heater motor resistor pack which you will find located near the fan motor. Open the hood and look to the left side corner of the fire wall. I have a 95 Astro and my resistor pack is located on top of the heater blower housing. I have changed many of these resisters on different makes and have found them to have their resistors rusted. The resistors are made of wire and they rtust and burn out. Find the small plug that goes to the resistors and you will find a a plate which has two screws, one on each end of the resistor pack. Remove the two screws and pull out the resistor pack. You can either get a used one from the junk yard or purchase one from a Chevy dealer. The resistor is used to control the different fan speeds and is located in the the blower housing so that the fan helps cool the resistors when the fan is running.


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