While mineral deposits are normal

the MK-3141 is the official replacement model

Optimized 18" Diameter: Ensures full coverage across the coil surface area for maximum heat transfer

ensuring the secondary 24V output remains stable for relays and contactors

simplifying integration into diverse control circuits

Lennox 10J73 Pressure Switch 323613-751 While mineral deposits are normalThe Lennox 10J73 Pressure Switch (Catalog Number 10J73, Model 103827 01) is a critical safety component designed for furnace applications to ensure the inducer motor is moving combustion air effectively. As a single pole, normally open switch, it is calibrated to a fixed set point of 0. 25 PF (inches water column), making it a precise replacement for the combustion air prover in Lennox G21, G24, G27, G28, G30, and G37 series furnaces. This HVAC