Mechanics

HEATER BLOWS COLD AIR

2004 Pontiac Montana • 250,000 miles

Pontiac Montana van. Heater blows cold air at idle but warms right up as RPM increases. Any idea what causes this. As RPM increases warm/hot air increases.
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Kedi
January 21, 2012.




Could be partially blocked/plugged heater core. Backflushing is usual cure.

Tiny
Fixitmr
Jan 21, 2012.


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