Lennox 57W37 Limit Switch 340793-762 If the blower fails to

If the blower fails to engage while the heating elements are energized

providing 300

This heavy-duty lubrication safety switch is engineered to detect drops in differential oil pressure

this 100327096 blower motor reduces system vibration and prevents the blocked flue pressure switch from tripping

TXV selection should not be based on tonnage alone because refrigerant type

Lennox 57W37 Limit Switch 340793-762 If the blower fails toThe 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