Expansion Valve: Service and Repair

Thermal Expansion Valve Replacement

Tools Required

J 39400-A Halogen Leak Detector

Removal Procedure

1. Recover the refrigerant from the A/C system. Refer to Refrigerant Recovery and Recharging.
2. Remove the rear evaporator line assembly.




3. Remove the TXV to evaporator core mounting bolts.
4. Disconnect the TXV from the evaporator and remove from the vehicle.
5. Remove and discard the evaporator core seal washers.
6. Cap or tape off the evaporator core.

Installation Procedure

1. Remove the cap or tape from the evaporator core.
2. Install new seal washers to the evaporator core.




3. Install the TXV to the evaporator core.

Notice: Refer to Fastener Notice.

4. Install the TXV to evaporator core mounting bolts.

Tighten the bolts to 7 N.m (62 lb in).

5. Install the rear evaporator line assembly.
6. Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging.
7. Leak test the fittings of the component using J 39400-A.