MedicMoe
Well-Known Member
Here is what I got going. I replaced the thermostat and the front heat is awesome, but I get luke warm air from the back. I've searched and can only find the clicking problem which I do not hear. I can get air from the roof and floor by the switch with no problem. I back flushed the rear heater core, and got a fair amount of brown out of it, and put it back together. I warmed up the truck, to the point I get nice heat from the front, but still none in the back. I checked the hosed to the rear core, and inlet is warm/hot, and return is cold. I checked under the hood and same thing, supply is hot to front and back, but the rear return is cold, front return is hot. Is there a valve that I'm not seeing in this loop to the rear?
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