Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

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High Pressure Sensor / Switch: Description and Operation

PURPOSE
To protect A/C system from damage by interupting power to the compressor during times of high system pressure.

OPERATION
The A/C high pressure cutout switch opens at 460-490 psi shutting OFF the A/C compressor. This switch is closed at 230-290 psi and allows compressor operation.