I can only get cool air whin I turn my heat all the way to hot, and turn the blower on. I know that it changes when I change it from dash to floor to defrost and so on but just cool air. Can you help me
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2002 Chevrolet Avalanche 1500 Question: I'm having trouble with the heater. It blows cool air.
Answer #1Herb Ackside October 28, 2012, 17:31Journeyman
Check to make sure that your coolant level is full and your engine reaches full operating temperature. How old is the thermostat? It probably needs replacing.
Answer #2ziptie12 October 29, 2012, 20:28Master
The 'mode control motor is responsible for defrost, vent and floorselections. The 'blend door' actuator , or control motor is for temperature , along with a heater control valve. Maybe check those, along with coolant and proper engine temp.