This burner door gasket and insulation assembly is a direct replacement for 100288663

economizer linkage

it needs replacement

and F42D72A13

Rugged Construction: Built with an ASTM B584 bronze body and PTFE seats for long-term seal integrity

Lennox 75W43 Thermal Switch 323080-701 This burner door gasket andThe Lennox 75W43 is a high precision compressor thermal switch engineered for critical temperature regulation in industrial and residential HVACR systems. As a genuine OEM component (Manufacturer Number 103048 01), this HVAC thermal protection switch prevents catastrophic equipment failure by monitoring operational heat levels. It features a specified open temperature range of 239F to 257F, which interrupts the electrical circuit to protect the