Lennox 25W71 Gasket 326058-757 though installing with the lid

though installing with the lid facing down is the preferred method to simplify debris removal

Smith models are compatible with this cleaning kit

Broad Compatibility: Serves as a direct technical cross for S1-H22J443DBEA

eliminating the need for field rewiring

7 microamps minimum) to prevent late-ignition scenarios

Lennox 25W71 Gasket 326058-757 though installing with the lidThe Lennox 25W71 Gasket is a critical OEM replacement part designed specifically for sealing the collector box cover in high efficiency Lennox furnaces. As a veteran tech knows, a compromised seal at the secondary heat exchanger leads to pressure switch trips and dangerous flue gas leakage. This precision engineered furnace collector box gasket (also indexed under 100742 01) ensures an airtight, negative pressure environment required for the draft