What is the AC Control Module all about?

Vehicle systems have become more electronic than mechanical. There are multiple computers aboard most vehicles produced in the last couple of decades, and they are designed to control different aspects of vehicle operation. Your AC control module is a computer designed to control and manage the heating and air conditioning system in your car. Depending on the make, model and specific features of your car, this may include automated climate control, where the car’s computer senses the ambient temperature inside and outside the car and adjusts the climate to suit your preferences. In this type of system, the driver sets a desired interior temperature, and the AC control module automates the system to maintain that temperature. If the AC control module is faulty, your HVAC control input will not result in proper temperature regulation.

Keep in mind:

• The AC control module is located inside the car’s dash, and is inaccessible for maintenance.
• The AC control module should be checked for fault codes during any air conditioning service or repair.
• Software updates may be necessary for the AC control module from time to time.

How it's done:

• The AC control module is verified that it needs to be replaced. The battery is then disconnected.
• The defective AC control module is removed by removing the trim panel and disconnecting the module.
• After the new AC control module is reconnected and secured into the mounting, the trim panel is reinstalled.
• The battery is reconnected. The AC control module is scanned and integrated with the vehicle for optimum performance.
• The AC is tested to ensure proper operation of the AC control module.

Our recommendation:

You cannot personally inspect or maintain your AC control module. In the event that your system is unable to maintain a steady temperature, does not produce cold air, or is inoperable, the AC control module should be checked for fault/trouble codes prior to any repairs or service. Have one of our expert mechanics diagnose and repair the AC control module if required.

What common symptoms indicate you may need to replace the AC Control Module?

• Unable to maintain temperature within cabin
• Air flow from vents/vent combinations could be incorrect
• AC not cooling correctly

How important is this service?

Having an operable air conditioning system is important for comfort and safety during the heat of summer. If your AC control module is experiencing problems, it is important to have it diagnosed by one of our expert mechanics because there are many different potential problems that can present the same symptoms.