On an Enclave, Acadia or Outlook, the air conditioner (AC) may be inoperative or blows warm air. This can be caused by a low state of refrigerant charge. If a low charge is found, check for leaks at the front Thermal Expansion Valve (TXV).
If a leak is found, do not replace the TXV. Replace the four seals at the TXV (two on back side of TXV at evaporator core fittings and two on front side at condenser tube and evaporator hose connections). Follow the instructions in SI for Thermal Expansion Valve Replacement.
IMPORTANT: Be sure the TXV mounting surface is clean and free of debris and lint before reinstalling the TXV. Be sure to properly torque the fasteners for the TXV.
- Thanks to Ron Erman
Bolts | attach TXV to evaporator | 5 Nm (44 lb in) |
Nut | attaches lines to TXV | 20 Nm (15 lb ft) |
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