Mechanics

WHAT IS WRONG WITH THE HEATER?

1996 GMC Safari • 185,000 miles

96 gmc safari - warm air will not blow into passenger compartment - have replaced thermostat and vacuum line - heater core and blower are working properly
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David88888888
January 14, 2012.




Sounds like blend door is not working right.
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Tiny
Fixitmr
Jan 14, 2012.
Inspect the air blend/mode/recirc doors/actuators/vacuum hoses-also check the HVAC control module

Tiny
Rasmataz
Jan 14, 2012.
Are hoses on firewall at core hot?

Tiny
Fixitmr
Jan 14, 2012.
Yes, the hoses are hot.

Tiny
David88888888
Jan 14, 2012.
Heater core could be blocked. Disconnect the lines and backflush. If that is the cause do it a few times to get it really cleaned out and the water comes out clear.

M_H_RITZEL
Jan 14, 2012.
Dont sound like core is plugged.

Tiny
Fixitmr
Jan 15, 2012.
Look for a electric temp control motor undr lower right side of dash on hvac case.

Tiny
Fixitmr
Jan 15, 2012.
With heater core eliminated then continue to follow fixitmr on checking the electric control motor.

M_H_RITZEL
Jan 15, 2012.

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