Climate Control Problem

:mad: Hello, I have a Buick Century 2000. All summer both of the duel climate controls were set on cold. This past Friday ,it got cold and I moved them both to heat. Drivers side stayed cold-- Passenger side got hot. Now I moved them both back to cold and drivers side stays hot but passenger side gets cold. Any ideas would be greatly appreciated . Thanks, Raycatcher

With the automatic climate control , you have a blend door in your system that does the blending of hot and cold air to accomplish your set temperature . This blend door has a motor than gets out of adjustment or fails altogether and doesn't work properly . If you will put this problem into the search feature of this section of the forum , you should pull up posts of possible solutions . Maybe that will help you with your problem . Good luck !