Refrigerant Pressure Sensor / Switch: Service and Repair

WM 878319 Removing and installing pressure switch

Technical values





Preliminary work

1. Drain refrigerant. -> 870317 Draining and filling refrigerant - section on "Draining" Service and Repair

Removing pressure switch

WARNING

Refrigerant

- Danger of freezing

-> Avoid contact with refrigerant.
-> Wear personal protective gear.
-> Observe the safety regulations for working on air-conditioned vehicles and dealing with refrigerant.
-> Observe the safety regulations for extraction and filling systems.
-> Observe the instructions for repairing air conditioning systems and storing spare parts.





Installation position

1. Release electric plug connection -1- ( -a- ) and pull it off the pressure switch -B-.





Unplugging connector on pressure switch

Information

Support the refrigerant line with your hand close to the pressure switch when screwing the pressure switch on and off.

2. Unscrew and remove pressure switch -2- at the hexagon using an open-ended wrench.





Removing pressure switch

Installing pressure switch

1. Replace the O-ring on the pressure switch and wet it with refrigerant oil.

Information

Support the refrigerant line with your hand close to the pressure switch when screwing the pressure switch on and off.

2. Screw pressure switch -2- onto the thread by hand and tighten it at the hexagon using an open-ended wrench. => Tightening torque: 5 Nm (3.5 ftlb.)





Installing pressure switch

3. Plug in electric plug connection -1- on the pressure switch until it engages securely.





Plugging in connector on pressure switch

Subsequent work

1. Fill in refrigerant. -> 870317 Draining and filling refrigerant - section on "Filling" Service and Repair