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.

Asked by for the 2001 Pontiac Bonneville
Sounds like you have a blend door issue.

Neil Bilodeau
SAF-T Auto Centers
Wallingford, CT 06492