Lennox 25W71 Gasket 320788-703 Regular maintenance involves inspecting the

Regular maintenance involves inspecting the strainer screen at least once per year or when pressure drops indicate scaling or fouling

Durable Construction: Built with high-temperature resistant materials to endure frequent ignition cycles without electrode degradation

and 3B electrode fittings

and 48HJ series rooftop units

Lennox 25W71 Gasket 320788-703 Regular maintenance involves inspecting theThe 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