Low-Charge Protection Switch
WARNING: This page is about a different car, the 2003 Lincoln Town Car. 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), see SPECIFICATIONS .
- 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.