this crankcase heater replacement is a standard-spec component for maintaining compressor reliability in low-ambient conditions

it guarantees a precision fit and proper seal

the gas orifice must be sized correctly for the specific BTU requirements of your furnace's fuel source

direct-fit installation across various packaged units and air handlers

reducing hunting and improving overall system efficiency in Building Automation Systems (BAS)

Lennox 63W56 Pressure Switch 318973-401 this crankcase heater replacement isThe Lennox 63W56 Pressure Switch is a dual stage combustion air prover designed for precise draft monitoring in high efficiency gas furnaces. This SPST normally open switch features dual setpoints of 0. 35" WC and 0. 60" WC, facilitating the sequenced operation required for two stage heating cycles. Engineered as a direct OEM replacement part, it ensures the inducer motor maintains proper static pressure before allowing the ignition sequence to