HEATER BLOWS COLD AIR

2004 Pontiac Montana

Tiny

kedi

January, 21, 2012 AT 4:33 PM

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.

FOUND 6257 RELATED QUESTIONS

No Heat

37 ANSWERS
5 IMAGES

1 Answer

Tiny

fixitmr

January, 21, 2012 AT 4:59 PM

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

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