how to fix the stuck passenger temperature control. Its stuck in the heat mode on 2001 Pontiac Bonneville

The driver side temperature control works on both heat & ac. The passesnger side on works on heat no matter what the temperature is set on.

by in Mechanicsville, VA on April 22, 2011
1 answer
ANSWER by on April 22, 2011
Sounds like you have a blend door issue. Neil Bilodeau SAF-T Auto Centers Wallingford, CT 06492 www.saftauto.com
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The mode and temperature door actuators may fail causing improper air flow or temperature output from the heating and AC (HVAC) system.