Camero heating system

1991 CHEVROLET CAMARO
120,000 MILES • 6 CYL • 2WD • AUTOMATIC
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BPART3
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On a 1991 Camero I have no cabin heat. I replace the heater control valve and radiator and coolant. I topped off the coolant after running engine for 20 minutes after reaching oper temp. the control seems to be operating. What have I overlooked...air bubble in system, check valve...???
Jan 30, 2011 at 6:43 PM
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ERNEST CLARK
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You can get air trapped in the heater core, but it sounds as though you've bled the system correctly. Have you attempted to flush the heater core to check for a blockage? Also, the blend door sometimes gets stuck, one/more of the vacuum lines/solenoids that controls the blend door could leak/break (including the main vacuum supply line entering the HVAC unit from the engine compartment)
Feb 23, 2011 at 2:27 AM