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This genuine OEM Reznor part is engineered to withstand the rigorous duty cycles typical of unit heaters and air handlers
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and isolation grommets should be sourced separately if the current hardware shows signs of pitting or wear
This modulating refrigerant valve is compatible with safety refrigerants including R22
MARS 43370 Pressure Switch 340155-7026 This genuine OEM Reznor partThe 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