Mechanics

PONTIAC BONNEVILLE DOOR PROBLEM

2000 Pontiac Bonneville • 150,000 miles

Why does the heat blow hot on the passenger side of car but cold on drivers side also when I cut on rear defrost it shatters rear windshield? Help me out please.
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Tdbear34
November 4, 2011.




If you have a duel climate control, there is a blend door for each side. This door, located near the heater core, is designed to open and close based on the temp needed in the car. If it is stuck, you will get cold air and no heat. That needs checked. As far as the shattering windshield, I don't understand how the rear defroster would cause the front window to break.



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