Lennox 92L21 Pressure Switch What is the difference between

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Durable Construction: Built to withstand the high ambient temperatures common in the upper housing of gas-fired unit heaters

preventing winding damage and ensuring reliable cycle initiation

and mineral oils without breaking down or stripping essential additives from the lubricant

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Lennox 92L21 Pressure Switch What is the difference betweenReplace your faulty inducer safety circuit with the Lennox 92L21 Pressure Switch, a precise OEM furnace replacement part cataloged under Lennox R20293412. This single pole single throw (SPST N. O.) switch is factory calibrated to actuate at 1. 61" W. C., ensuring the draft inducer motor maintains the specific static pressure required for safe combustion and flue gas venting. Designed with dual 1 4" barb connections, this component provides a secure