Illinois 0037100 Steam Trap 318973-401 the motor's internal bearings have

the motor's internal bearings have likely seized

replacing brittle or flattened 96451 isolators is a primary troubleshooting step when a unit heater is producing disruptive mechanical noise or cabinet rattle

Broad Compatibility: Drop-in interchangeable ignition control for legacy BG and G series models

Utilizing an original equipment burner instead of a generic alternative ensures the flame pattern remains stable

Illinois 0037100 Steam Trap 318973-401 the motor's internal bearings haveThe Illinois 0037100, also identified as the Watts WFT 15, is a heavy duty 3 4" float and thermostatic steam trap engineered for reliable condensate removal and continuous air venting in low pressure systems. Featuring a rugged cast iron body and an H pattern design, this trap is specifically built for steam main drips, unit heaters, and heat exchangers where rapid air elimination is critical during startup. The internal stainless steel float and