I am having problems with the heater, no heat.

Tiny
BODENE62
  • 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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Tuesday, January 22nd, 2013 AT 11:19 AM

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Tiny
ASEMASTER6371
  • EXPERT
  • 25,511 POSTS

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

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Tuesday, January 22nd, 2013 AT 11:41 AM

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