Description
The Trane SWT04557 Limit Switch L150-30F is a temperature-activated protective unit used in gas heating equipment to prevent overheating. It is mounted on the heat exchanger or discharge area where it monitors surface temperature and opens the electrical circuit when conditions exceed the rated limit in HVAC systems. The switch is designed to interrupt burner operation at elevated temperatures and automatically reset once the system cools to a safe level. It appears in domestic and workplace furnace assemblies as part of the safety protection circuit to regulate safe operating conditions and prevent equipment damage.
