2004 Pontiac Montana Repair Question

Topics covered: Heater, Heater core, Rpm.
Mileage: 250,000 miles.

Asked on January 21, 2012

Pontiac Montana van. Heater blows cold air at idle but warms right up as RPM increases. Any idea what causes this.

Heater blow cold air at idle. As RPM increases warm/hot air increases.

Asked by kedi

Replied on January 21, 2012

could be partially blocked/plugged heater core. backflushing is usual cure.

Answered by fixitmr
24 questions asked