High Pressure Cutout Switch

The high-side, high pressure cut-off switch in the rear head of the compressor is a protective device intended to prevent excessive compressor head pressures and reduce the chance of refrigerant escape through the high pressure relief valve. Normally closed, this switch will open the compressor clutch circuit at a high-side pressure of approximately 2700 kPa (430 psi ± 20 psi) and reclose the circuit at approximately 79 kPa (200 psi ± 50 psi).