Precise Superheat Control: Maintains optimal refrigerant flow across varying load conditions to protect the compressor

Broad Compatibility: Fully compatible with Selectrastat selectors and Series 20 amplifiers for seamless system integration

making it a versatile choice for standard residential and light commercial A/C repair and furnace maintenance

moisture and non-condensables are the primary enemies of compressor longevity and heat transfer efficiency

The Watts 0780009

MARS 43370 Pressure Switch 321894-708 Precise Superheat Control: Maintains optimalThe MARS 43370 Pressure Switch is a mission critical fan cycling switch designed for precision condenser control in high performance cooling systems. This SPST open fall switch features fixed settings of 180 240 PSI, specifically engineered to open on a pressure drop to 180 PSI and close on a pressure rise to 240 PSI. This sequence ensures optimal head pressure regulation, preventing compressor short cycling and maintaining system efficiency during