A/C Cycling Switch

Air Conditioning

A/C Cycling Switch

The low-charge protection switch 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.
- When the A/C cycling switch contacts open, the A/C clutch field coil is de-energized and compressor operation stops.
- The A/C cycling switch is mounted on a Schrader valve-type fitting on the top of the suction accumulator.
- A valve depressor, located inside the threaded end of the A/C cycling switch, presses in on the Schrader valve stem, allowing the suction pressure inside the suction accumulator to control the operation of the A/C cycling switch.
- It is not necessary to discharge the refrigerant system to remove the A/C cycling switch.