Lennox 56W27 Control Limit 319847-401 the range and differential are

the range and differential are clearly marked on the internal scale

Field Serviceability: The tee handle adjustment simplifies on-site calibration without the need for specialized tools in tight mechanical spaces

For contractors managing cold storage or process cooling

Specifically rated as a 660-420# High Close Off device

Its robust construction ensures it holds up under high-pressure operating conditions

Lennox 56W27 Control Limit 319847-401 the range and differential areThe Lennox 56W27 Control Limit is a critical safety component designed for high limit temperature monitoring in residential and commercial heating systems. This genuine OEM blue green limit switch is engineered to open the electrical circuit to the furnace if internal temperatures exceed safe operating parameters, preventing heat exchanger damage and ensuring system integrity. As a veteran grade HVAC replacement part, it offers a precise thermal