Lennox 92L21 Pressure Switch What is the difference between

What is the difference between an isolated coil and a grounded coil

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

requirements allows for proper gas pressure regulation and prevents the equipment from operating outside its intended set point

or the furnace throwing a code for an "open limit

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