By sensing compressor head pressure

this specific model is designed for vertical mounting to ensure the setpoint window and branding align correctly with the internal scale

it is recommended to use one leg of the circuit and a neutral wire to power the 120V heater circuit within the control

A compromised blower housing can lead to air bypass

It facilitates precise sequence timing for fan operations

Lennox 36M63 Limit Switch 318518-761 By sensing compressor head pressureThe Lennox 36M63 Limit Switch is a critical safety component designed for precise thermal monitoring in HVAC residential heating systems. This L130 20F limit switch features a fixed temperature setpoint, engineered to open the electrical circuit at 130F and automatically reset when the temperature drops to 110F. As a genuine OEM replacement part, it ensures seamless furnace limit control, maintaining high limit safety standards to prevent heat