Re: Heater Not working
I would start with letting the truck warm up. Then feel the heater core hoses. Check to see if both hoses are hot and the same temp with the fan off.
If only one is hot then a few things to check.
1) is the heater core plugged?
2) there is a vaccum operated valve in the heater core hoses. Remove this and install
(2) 5/8 barb fittings.
3) even if the thermostat is stuck open, eventually the truck will get hot enough to produce heat.
I can get heat as low as 120 on my temp gauge, its not hot, but is still warmer than no heat.
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also, is it that there is not heat or that the fan is not blowing...?
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