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a continuity test across the 100109925 terminals is the standard diagnostic procedure
The high-grade construction resists the corrosive flue gasses and thermal stress common in condensing furnace environments
and physical frame match
replacing older electromechanical or hybrid systems often found on 5-pin terminal plate configurations
Lennox 84K81 Flue Cover 320788-704 a continuity test across theThe Lennox 84K81 Flue Cover is a critical OEM component designed to maintain the structural integrity and venting efficiency of residential gas furnaces. Engineered as a high durability sheet metal flue cover, this assembly includes the necessary furnace flue gaskets to ensure a gas tight seal at the exhaust transition point. In the field, a compromised or corroded cover can lead to dangerous combustion gas leaks and improper draft, which triggers
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