Mechanics

CHEVROLET TAHOE HEATER PROBLEM

1995 Chevrolet Tahoe • 150,000 miles

I am having problems with the heater, no heat, changed thermostat, heater control valve and new coolant, still no heat? Someone told me that it could be a blocked heater core? And can the door be replaced on the box that controls where the heat goes to? The door arm is broke inside which controls the air flow? Will it hurt the truck to run water straight through the heater core, no valve?
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Bodene62
January 22, 2013.



Flush the heater core both ways to clean of debris. Both hoses should be hot when running.

The door is part of the case and is replaced as an assembly. That may be your issue. Try moving the door manually to see if you get heat

Roy

ASEMaster6371
Jan 22, 2013.