the P271100 is the correct replacement flame sensor for maintaining the mechanical integrity of both top vent and direct vent furnace configurations

It is engineered with a 160-degree F fixed open temperature and a 140-degree F fixed close temperature

Maintaining a stock of these Weil McLain 383-500-604 fuses on the service truck is essential for rapid boiler repair

eliminating the need for external vent piping in indoor installations where gas escapement must be restricted

Lennox 83L83 Limit Switch the P271100 is the correctThe Lennox 83L83 Limit Switch is a critical safety component designed for precise thermal regulation within residential gas furnaces. As a genuine Lennox OEM replacement part, this auto reset limit switch is engineered to open the electrical circuit to the gas valve if the plenum temperature exceeds the 180F safety threshold, preventing heat exchanger damage. Once the temperature drops to approximately 150F, the switch automatically closes to resume