Auxiliary Air Conditioning Evaporator Thermal Expansion Valve Replacement

WARNING: This page is about a different car, the 2016 GMC Acadia, 2016 Chevrolet Traverse, and 2016 Buick Enclave. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Auxiliary Evaporator Thermal Expansion Valve

Courtesy of GENERAL MOTORS COMPANY

Callout	Component Name
Preliminary Procedures Recover the refrigerant. Refer to Refrigerant Recovery and Recharging . Remove the retaining nut and the auxiliary A/C evaporator tubes from the auxiliary HVAC module. Refer to Auxiliary Air Conditioning Evaporator Tube Replacement .
1	Auxiliary Air Conditioning Evaporator Thermal Expansion Valve Bolt (Qty: 2) CAUTION: Refer to Fastener Caution . Procedure Insert a small phillips screwdriver through one of the thermal expansion valve (TXV) bolt holes and into the threaded hole of the mounting plate. Install the TXV bolt into the other hole without the screwdriver. Remove the screwdriver and install the other TXV bolt. Tighten 5 N.m (44 lb in)
2	Auxiliary Air Conditioning Evaporator Thermal Expansion Valve Sealing Washer Procedure Remove and discard the sealing washer. Refer to Air Conditioning System Seal Replacement .
3	Auxiliary Air Conditioning Evaporator Thermal Expansion Valve Procedure The auxiliary A/C refrigerant filter must be replaced when the auxiliary thermal expansion valve is serviced. Refer to Air Conditioning (AC) Refrigerant Filter Replacement .