By sensing compressor head pressure

It facilitates precise sequence timing for fan operations

A compromised blower housing can lead to air bypass

ensuring stable power distribution to high-amperage components like electric heat strips and blower motor assemblies

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