Just in the middle of the coldest spell of the year my 92 chev astro front heater fan decides to pull an intermittent problem on me. I will be driving and the fan will stop working, then start working out of the blue. It now spends more time not working than working!
I dug into my crappy haynes manual to see what I am up to with trouble shooting the problem. From the look of it I am dealing with 3 components. The HAVC control module on the dash (the temp and mode levers and the fan switch), the Blower motor resistor and relay pack and the blower motor.
The fan seem ok, I am suspecting the fan switch or the Blower motor resistor and relay pack. Can anyone tell me where the Blower motor resistor and relay pack is situated? I can't seem to tell from the manual.
Anyway anyone got any ideas, experiences with this problem?
TIA
Tony.