Mechanics

CHEVY HEATER

2000 Chevrolet Astro

Heater problem
2000 Chevy Astro 225000 miles

the heater only works on defrost. The air coming out is nice and warm but I cannot get it to change from defrost to any other position.
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Kathykuder
January 27, 2008.



May be a bad heater control unit. Pretty pricy if I remember right. It needs to be tested.

Add to up
check the back of the switch too
check the vacuum line and source
also

BMRFIXIT
Jan 27, 2008.