Common indicators include improper defrost timing

Industry Standard Leads: Features color-coded 8-inch leads for rapid wiring and identification

lifting flame or "flame rollout" due to excessive air velocity

or a failing blower motor capacitor before assuming the switch itself is defective

a 440V rated capacitor is a suitable upgrade as it offers a higher insulation breakdown threshold

Trane THT2437 Limit Switch Common indicators include improper defrostThe Trane THT2437 Limit Switch is a high precision, OEM furnace safety control designed to maintain thermal integrity within Trane and American Standard heating systems. This automatic reset limit switch operates as a critical safety thermostat, featuring a calibrated 190F open temperature to interrupt the burner circuit during over temperature conditions and a 160F close temperature for system re engagement. Engineered with 7 inches of insulation,