AC/Heater Control Module
An AC/heater control module is a computer that controls and automates the operation of the heating, ventilation, and air conditioning systems (HVAC).
Symptoms of Wear or Failure
- HVAC system might not heat or cool properly
- Air distribution from the HVAC may be incorrect
Related Repair Advice
- Fault codes stored in the HVAC control module should be reviewed as part of any HVAC system diagnosis
- As with most computer controlled systems in modern vehicles, the climate control system may need occasional software updates to address various issues. A quality shop will check with the manufacturer to see if there are any Technical Service Bulletins (TSBs) related to the problems you're having and will upgrade the software when possible.