Mechanics

VAN. HEATER BLOWS COLD AIR AT IDLE BUT WARMS RIGHT UP AS RPM INCREASES. ANY IDEA WHAT CAUSES THIS.

2004 Pontiac Montana • 250,000 miles

Heater blow cold air at idle. As RPM increases warm/hot air increases.
Avatar
Kedi
January 21, 2012.



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

Tiny
Fixitmr
Jan 21, 2012.