The Lennox 25W20 Conversion Kit (LB-94723D) is a factory-authorized solution designed to transition Lennox G40 and G50UH/DF series gas furnaces from natural gas to liquid propane (LP)

preventing false error reporting

The pre-purge allows the inducer fan to exhaust any unburned gas from the combustion chamber

whereas the MT series uses mineral oil for R22 applications

and all necessary gaskets and seals for a total valve overhaul

Heatcraft Refrigeration 30101701 Limit 323055-751 The Lennox 25W20 Conversion KitThe Heatcraft Refrigeration 30101701 is a commercial grade discharge line freeze thermostat engineered for high limit protection in condensing units and cold storage systems. This technical grade limit control is specifically calibrated with a 210F limit and a 50F differential to prevent compressor overheating and protect critical refrigeration components. As a genuine Heatcraft OEM part, it ensures direct compatibility with Bohn, Larkin, and Climate