Driver's and Passenger's Side Vent Temperatures Vary By More Than 20 F (11 C)

Driver's and passenger's side vent temperatures vary by more than 20 °F (11 °C)

Probable causes: The recirculation control door or the air mix doors are malfunctioning.

Do the following troubleshooting:

Recirculation control motor test Recirculation Control Motor Test

Driver's air mix control motor test Driver's Air Mix Control Motor Test

Passenger's air mix control motor test Passenger's Air Mix Control Motor Test

Also Check for

Climate control DTCs

Also Check for

Poor or loose connections at the terminals