040-311

This premium Low Pressure Switch is a vital safety component for residential and commercial HVAC systems, including central air conditioners and heat pumps. Designed to protect the compressor from damage, this air proving switch monitors refrigerant pressure and automatically interrupts the electrical circuit if levels drop too low, preventing system freeze-ups and mechanical failure. Whether you are performing routine maintenance or troubleshooting a cooling system that won't start, this pressure-sensing control ensures reliable operation and extends the lifespan of your outdoor condensing unit. It acts as a critical safeguard against loss of charge or airflow restrictions, making it an essential replacement part for maintaining optimal climate control performance.
Type: Low Pressure Switch / HVAC Safety Control
Size: Small
Application: Used in central air conditioning units and heat pump systems to monitor refrigerant pressure and protect the compressor from low-pressure conditions.
Specifications: 60 PSI reset (cut-in) / 27 PSI trip (cut-out) thresholds; designed for air proving and refrigerant pressure monitoring; SPST (Single Pole Single Throw) configuration.