About a month ago I started to hear a clicking sound from under the dash when turning on the AC. I had to play with the zone, fan speed, etc to get it to stop. Now the clicking sound is gone but the heat never goes off unless I turn the AC on. With no AC on and the thermostat turned completely to blue the heat still comes out.
Chrysler Q&AAsk Your Question
2006 Chrysler 300 Question: Why does heat stay on even when thermostat turned to cold (AC off).
PARTS GUY December 30, 2012, 13:32Master
You have a bad blend door actuator. It also could be a bad climate control head.
Answer #2Greg's Orange Auto (12976 Answers) , Orange, CA - (714) 361-9386globalhelper December 30, 2012, 16:27Master
blend door actuator went bad thats what the clicking noise was