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It is not recommended for ammonia (R717) or flammable refrigerants
protecting expensive compressors and motors from terminal damage
Common Questions Is the S1-025-41333-000 compatible with all York air handlers
Always verify the serial number of your Lochinvar boiler before purchase to ensure part compatibility
MARS 39042 Limit Switch 318518-761 It is not recommended forThe MARS 39042 is a professional grade Manual Reset Limit Switch designed for high temperature safety across commercial and residential HVACR systems. This SPST (Single Pole Single Throw) switch is engineered to open on temperature rise at a fixed 240F cut out temperature, providing a critical secondary safety layer for furnace plenums and air handling units. Operating within a 120 240V rating and supporting 5 to 10 Amps, it replaces standard 3 4 inch