Low Charge Protection Switch
WARNING: This page is about a different car, the 2002 Ford Taurus. However, it is still accessible from the selected car via links, so may be relevant.
The low charge protection switch (19E561) is used to prevent A/C compressor damage in the event of a low refrigerant charge.
- The electrical switch contacts open when the suction pressure drops below normal levels. The contacts close when the suction pressure rises. For specifications regarding operating pressure(s), refer to REFRIGERANT SYSTEM TESTS .
- When the low charge protection switch contacts open, the A/C clutch field coil is de-energized and compressor operation stops.
- The low charge protection switch is mounted on a Schrader valve-type fitting on the top of the suction accumulator/drier.
- A valve depressor, located inside the threaded end of the low charge protection switch, presses in on the Schrader valve stem, allowing the suction pressure inside the suction accumulator/drier to control the operation of the low charge protection switch.
- It is not necessary to discharge the refrigerant system to remove the low charge protection switch.