'02 Blazer heater fan only works on 2 and 3
#1
Beginning Member
Thread Starter
Join Date: Sep 2007
Location:
Posts: 23

but not 1 and 4??? any ideas guys???
#2
sounds like blower motor resistor...it mounts just to the right of the blower motor if your standing in front of truck.
if you do a search on it you may find a how to and some info to verify before buying a part.
if you do a search on it you may find a how to and some info to verify before buying a part.
#4
BF Veteran
Join Date: May 2011
Location: SW Central OH
Posts: 2,253


Hi doesn't go through the resistor.
Check your underhood fuses, there's a 30a for just high speed. And a relay that's actuated in "4".
Not running in "1" would be the resistor
That or the speed switch is faulty
Check your underhood fuses, there's a 30a for just high speed. And a relay that's actuated in "4".
Not running in "1" would be the resistor
That or the speed switch is faulty
#5
Thanks for the correction...i learned soemthing on this one too.
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