Ford YC3Z-19849-AA
Expansion Valve, Rear

You must accomplish refrigerant recovery and discharging before beginning service and repair tasks on the expansion valve of the auxiliary climate control system. Move on to the second step by removing the right-hand rear quarter trim panel access panel along with its associated jack unit. Remove the A/C lines from the A/C evaporator expansion valve before detaching the expansion valve from the core of the evaporator. The installation requires reversing the prior removal steps while using PAG Refrigerant Compressor Oil (R-134a Systems) F7AZ-19589-DA (Motorcraft YN-12-C) or an equivalent product that satisfies Ford specification WSH-M1C231-B for lubricating the O-ring seals. Conclude the process by performing evacuation then leakage testing and system charging.

A service or repair of the expansion valve necessitates completing the refrigerant recovery and discharging procedures first. First remove the jack and access panel from behind the right-hand side rear quarter trim before moving on the valve. First disconnect the A/C lines from the expansion valve installed on the evaporator core then remove this valve from its attachment point to the evaporator. Installation requires performing the reverse of removal steps while applying PAG Refrigerant Compressor Oil (R-134a Systems) F7AZ-19589-DA (Motorcraft YN-12-C) or another equivalent oil that meets Ford specification WSH-M1C231-B to lubricate the O-ring seals. The A/C system needs evacuation and leak testing before receiving a complete system charge.

Reverse the removal procedure, ensuring to install new O-ring seals that have been lubricated with clean mineral oil.

Reverse the removal procedure, ensuring to install new O-ring seals and lubricate the refrigerant system with the correct amount of clean PAG oil.

Finally, evacuate, leak test, and charge the A/C system.