To replace the HVAC control assembly, first, remove the I/P accessory trim plate, the screws of the HVAC control assembly then pull the HVAC control assembly away from the I/P - disconnect from the vacuum hose harness connector, the temperature actuator, the blower motor switch electrical connector and the rear defroster control electrical connectorfrom the HVAC control assembly. For installation, the vacuum hose harness connector , the temperature actuator and the blower motor switch electrical connector and the rear defroster control.Connector can be connected to the HVAC assembly. Next, install the HVAC control assembly to the I/P , making sure to observe the Fastener Notice in Service Precautions and fasten with the HVAC control assembly retaining screws and tighten it up to 2 N.m (18 lb in). Lastly, revisit the accessory trim plate.