and vent float required for a full rebuild

preventing heat exchanger damage and ensuring system safety

Key Benefits Exact Compatibility: Direct replacement for Weil McLain HE

making it essential for natural gas and propane applications requiring intermediate pressure control in residential or small commercial settings

it provides efficient low-power consumption while managing substantial inductive and resistive loads

Lennox 52M74 Rollout Switch and vent float required forThe Lennox 52M74 Rollout Switch is a critical safety component designed for precise over temperature protection in Lennox furnace units and residential HVAC systems. As a Single Pole Single Throw (SPST) switch, this manual reset flame rollout switch is engineered to interrupt the ignition circuit when it detects temperatures reaching the 320 degrees F threshold. This prevents hazardous conditions resulting from heat exchanger failure or flue