MY HEAT BLOWS COLD WHILE IT IDLESBUT GIVES HOT ...

1999 Buick Century

Tiny

Anonymous

February, 20, 2013 AT 5:22 PM

My heat blows cold while it idles, but gives hot heat when driving.

FOUND 3513 RELATED QUESTIONS

1 Answer

Tiny

JDL

February, 20, 2013 AT 6:06 PM

You may need to flush heater core? The water pump slows down at idle, speeds up at higher rpms. Coolant flow through heater core slows down at idle. If heater core is restricted, even less flow at idle.

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