Heat Doesnt Seem To Work
#1
Heat Doesnt Seem To Work
Well this is a strange problem. I didnt even know it was possible to be honest. I turn the heat on in my Blazer and it doesnt seem to get hot just sort of a slightly warm but still cool air. This is with the heat all the way to 82 and the truck being driven for about 30 minutes. Any ideas?
#2
coolant level ok?
#3
#4
Heater core plugged? Blend door actuator bad or stuck?
#5
Could be a vacuum leak in the blend ****. I had the same problem with my selector switch. Stick your head up to the actual **** and see if you hear a hissing. Mine had a bad seal. I also found that if I floored it, it drew enough vacuum temporarily and kicked it where I wanted until I replaced it.
#6
Could be a vacuum leak in the blend ****. I had the same problem with my selector switch. Stick your head up to the actual **** and see if you hear a hissing. Mine had a bad seal. I also found that if I floored it, it drew enough vacuum temporarily and kicked it where I wanted until I replaced it.
Also had a bad HVAC vacuum switch - it would make a hissing sound and was slow to switch between defrost,vent,floor,etc. Surprisingly a new replacement switch was not available, so I got one from a junkyard.
Maybe I wasn't using the correct terminology? Isn't the blend door electrically operated by the HVAC temp switch?
#7
Thanks guys, turns out the heater core was plugged. Had to have it back flushed but 84 bucks and I have heat again!
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