Lennox 18J37 Limit Switch Common Questions Is the 5H0749760003

Common Questions Is the 5H0749760003 a manual or automatic reset switch

preventing setpoint migration over time in demanding industrial environments

This furnace limit switch operates on a 60-70°F differential

Standardized Fit: Features a universal 1/2 inch NPT conduit opening and 18-inch leads for rapid field replacement

This size 00 orifice is essential for managing the flow of liquid refrigerant into the evaporator

Lennox 18J37 Limit Switch Common Questions Is the 5H0749760003The Lennox 18J37 Limit Switch is a critical safety component engineered for high performance thermal regulation in residential and light industrial furnaces. As a normally closed disc style limit control, this genuine OEM Lennox replacement part is specifically designed to prevent heat exchanger damage by interrupting the burner circuit if internal temperatures exceed safety thresholds. Featuring a yellow color coded sleeve for rapid field