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When diagnosing furnace diagnostic flashes
heat strips
Technicians should look for "failed to prove" air pressure switch errors
polarity is not a concern for the input signal
Lennox 92W97 Limit Control 322056-301 When diagnosing furnace diagnostic flashesThe Lennox 92W97 Limit Control is a critical safety component designed for precise thermal regulation within residential and commercial HVAC heating systems. Engineering as an L215 40F limit switch, this genuine OEM replacement part ensures the unit operates within defined safety parameters by interrupting the power circuit when internal temperatures reach 215F. It features an auto reset function that restores the circuit once the system cools to
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