Mechanics

PONTIAC GRAND PRIX HEATER PROBLEM

2003 Pontiac Grand Prix • 135,000 miles

My car will heat up and blow out hot air for a minute or two then all of a sudden it will blow out cold. If I play with the temp controls sometime it will blow out hot again. It switches instantly from hot to cold and cold to hot. Any ideas?
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Guest
November 7, 2012.




Check to make sure coolant is full first. Check for a vacuum leak from engine to heater, and checkt items 1 & 6 on heater.


Hmac300
Nov 7, 2012.


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