Lennox 52M74 Rollout Switch While primarily designed for steam

While primarily designed for steam to dissipate heat

Dual Hub Mounting: Two 1/2-inch threaded hubs provided for flexible conduit attachment and internal/external enclosure mounting

Is this compatible with LP or Natural Gas systems

Using this on a vertical base will result in misaligned windows and improper fitment

Key Benefits Direct Cross-Reference: Exactly replaces the legacy 324435 part number to maintain 37-101 specifications across multiple generations of feeders

Lennox 52M74 Rollout Switch While primarily designed for steamThe 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