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Common Questions Is the 3L05-1 a direct replacement for my fixed limit switch
Is this packing nut compatible with direct-acting valves
and EKC controllers
What is the rotation of the Lennox 34K77
Lennox 57W37 Limit Switch R-407A Common Questions Is the 3L05-1The Lennox 57W37 Limit Switch is a critical safety component designed for precise thermal regulation in residential and commercial furnaces. This genuine OEM Lennox replacement part features an auto reset mechanism, ensuring the system returns to standard operation once temperatures stabilize. Engineered as a normally closed circuit, the switch is calibrated to open on temperature rise at 170F and close on temperature drop at 140F, effectively