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The Lennox 10P96 is a genuine OEM universal fan and limit control that governs two critical functions in your furnace: it energizes the blower once the heat exchanger reaches temperature, and it acts as a high-limit safety switch that shuts down the burners if the plenum overheats. This combination control protects your Lennox furnace from dangerous heat buildup while ensuring warm air is only circulated when it should be.
Common failure symptoms include the blower running constantly or never starting, short-cycling on the limit, cold air blowing from the vents, or the furnace tripping out on high limit. A worn or miscalibrated fan and limit control can leave you with no heat or an unsafe operating condition.
Why OEM matters: The 10P96 is engineered to the exact temperature set points and electrical specifications Lennox designed for their equipment. Generic substitutes may switch at the wrong temperatures, causing nuisance trips or, worse, defeating the safety cutoff. Installing the factory-spec part restores proper blower timing and reliable overheat protection for your Lennox system.