Lennox 31J96 Rollout Switch What is the difference between

What is the difference between the 272742A and the 272742A/U

Key Benefits for HVAC Professionals Precise Thermal Protection: Factory-calibrated to open at 145°F (L145-40F) to prevent heat exchanger damage and rollout hazards

As a direct Goodman defrost thermostat replacement

Can I use a standard automotive 3-amp fuse instead

Precision Control: Maintains exact positioning of dampers and valves to prevent energy loss in BAS (Building Automation Systems)

Lennox 31J96 Rollout Switch What is the difference betweenThe Lennox 31J96 Rollout Switch is a critical safety component designed for precise thermal monitoring in residential and commercial gas furnaces. Engineered as a manual reset flame rollout switch, this SPST (Single Pole Single Throw) device is calibrated to actuate at 320 degrees F (+ 13F). When the switch detects temperatures exceeding this safety thresholdoften caused by blocked venting, a failing inducer motor, or a compromised heat exchangerit