Air Conditioning Evaporator Thermal Expansion Valve Replacement

Air Conditioning Evaporator Thermal Expansion Valve Replacement

Special Tools

J 39400-A - Halogen Leak Detector

Removal Procedure

1. Recover the refrigerant. Refer to Refrigerant Recovery and Recharging Refrigerant Recovery and Recharging.

2. Remove the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement Service and Repair.

3. If equipped, remove the windshield washer solvent heater. Refer to Windshield Washer Solvent Heater Replacement (Traverse) Service and RepairWindshield Washer Solvent Heater Replacement (Acadia and Enclave) Service and Repair.




4. Remove the evaporator thermal expansion valve (TXV) tube from the TXV.

5. Remove and discard the seal washers.




6. Remove the TXV bolts.

7. Remove the TXV.

8. Remove and discard the seal washers.

Installation Procedure

1. Install the TXV seal strip. The center of the seal strip should cover the dome at the top of the TXV and then down both sides of the TXV.




2. Install new seal washers to the evaporator core fittings. Refer to Air Conditioning System Seal Replacement Air Conditioning System Seal Replacement.

3. Install the TXV.

Caution: Refer to Fastener Caution Fastener Caution.

4. Install the TXV bolts. Insert a small phillips screwdriver through one of the 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 the bolts to 5 Nm (44 lb in).




5. Install new sealing washers on the evaporator TXV tube fittings. Refer to Air Conditioning System Seal Replacement Air Conditioning System Seal Replacement.

6. Install the condenser tube and evaporator hose to the TXV.

7. Install the TXV nut.

Tighten the nut to 20 Nm (15 lb ft).

8. Evacuate and charge the refrigerant system. Refer to Refrigerant Recovery and Recharging Refrigerant Recovery and Recharging.

9. If removed, install the windshield washer solvent heater. Refer to Windshield Washer Solvent Heater Replacement (Traverse) Service and RepairWindshield Washer Solvent Heater Replacement (Acadia and Enclave) Service and Repair.

10. Install the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement Service and Repair.

11. Leak test the fittings using the J 39400-A - halogen leak detector.