» »

Car encyclopedia

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.

Ask a Question Find a Shop
Featured Articles
Ask a Question