My heater/AC fan will work all the time in high speed. All other speeds will not work sometimes. Have you an idea what’s wrong with this?
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2006 Chevrolet Colorado Question: Blower Motor works sometime
Answer #1ziptie12 July 22, 2012, 22:38Master
system electrical diagram and circuit description of operation......then you can guess all you want or diagnose it with the correct info & troubleshooting guide.
Answer #2pushrod July 23, 2012, 01:46Master
BLOWER RESISTOR! High speed is not controlled by the resistor,but the lower speeds are.
Located near the blower motor behind glove box.
Replykeaton, July 23, 2012, 18:24Rookie
This is very helpful. Is the resistor in the cab or on the firewall?
Replypushrod, July 23, 2012, 18:38Master
LOOK BEHIND GLOVE COMPARTMENT!! Maybe you should seek a mechanic's help.
ck blower motor resistor it defaults to high if its bad most of the time