B1235
Problem In The Driver Side Air Mix Control Linkage, Door, Or Motor Circuit
Severity
⚠️ MediumCan you drive?
Yes, but get it checked soon
Approx. repair cost
$33–167 (est.)
Symptoms
- Inability to regulate air temperature on the driver's side
- Constant flow of only hot or only cold air
- Rattling sounds from under the panel when the climate control is operating
Causes
- Air mixture damper jammed
- Damper motor malfunction
- Open or short circuit in control circuit
- Problems with the HVAC control unit
How to Fix
- Check and clean the damper mechanism from dirt and debris
- Test the damper motor
- Check the integrity of the wiring harness and connectors
- Measure resistance and voltage in the control circuit
- If necessary, replace faulty components