Mechanics

WHY DOES THE TEMP ON MY HEAT PAST 230 DEGREES AND BLOW OUT COLD AIR WHEN HEAT IS ON, ONLY TO DROP THE TEMP BACK DOWN TO NORMAL AND BLOW OUT HOT AIR AFTER IT GOES PAST 230. THIS JUST STARTED.

2005 Pontiac Grand Am • 137,000 miles

Already tried replacing thermostat, no change
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Rd otter
March 13, 2012.




Check the operation of the air blend door/actuator

Rasmataz
Mar 13, 2012.


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