Heater a/c fan runs but not every time turned on , why?

What is your question?

this happens only some time but more frequently lately,seems to be in the control circuitry, could be a relay or resistor failing .

Dossett in Gilbertsville KY

Dec 4, 2014

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Popular Answer

CharlesAutomotiveon Dec 4, 2014

Most likely a bad relay would cause the fan not to work at all, not just sometimes. Sounds like it could be a wiring problem or a problem in the HVAC control unit.

pushrodon Dec 4, 2014

Another suspect: Blower Motor Resistor $ 32.85 /ea Part Number: BR630 Product Line: NAPA Echlin Ignition Parts *Repair kit may be available @ GM dealer.*

globalhelperon Dec 4, 2014

CK WIRING PIGTAIL AT BLOWER MOTOR RESISTOR,THEY BURN AT PLUG

csubak30on Dec 4, 2014

I ran into that twice.....pigtail melts on the end....wonder why??

pushrodon Dec 4, 2014

High resistance caused by poor connection creates heat... NAPA..... GM offers a repair kit with resistor and wire/connector.

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