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the 100109872 governs the ignition sequence regardless of gas type
This SPST switch is standard on many Lennox-built 80% and 90%+ AFUE gas furnaces
which comes to you directly from the manufacturer
The compact frame and Fasco 712112945 cross-reference specifications guarantee a factory-standard fit
Aaon P77450 Block Fuse R-410A the 100109872 governs the ignitionThe Aaon P77450 Block Fuse is a critical industrial component designed for high performance circuit protection in commercial HVACR systems. This 2 pole Class CC fuse block is engineered to handle a 30A 600V electrical load, ensuring the safety of sensitive machinery against overcurrent and short circuits. Featuring a rejection style design, the P77450 prevents the installation of incorrect fuse types, maintaining the integrity of your equipment's