or differential pressure using 0

Can I use a single-stage switch to replace this dual-stage model

The Lennox 99K57 Inducer Assembly is a critical OEM replacement component designed to maintain the mechanical integrity and venting safety of high-efficiency gas furnaces

Key Benefits Factory-Calibrated Performance: Fixed at a 4 mA starting point and 16 mA span for consistent proportional control

preventing inefficient cycling and protecting the boiler from water level fluctuations

McDonnell & Miller 64-HD Cut Off Els PW 17895 or differential pressure using 0The McDonnell & Miller 144400, also known as the 64 HD Head Mechanism, is a heavy duty replacement unit designed for Series 64 and Series 764 low water cut offs. Engineered for both hot water and steam boilers, this mechanical oversight component facilitates an auto reset function to ensure continuous system protection without manual intervention. As a float type LWCO mechanism, it is rated for a maximum boiler pressure of 50 PSI. This unit serves as