Industrial HVAC Thermal Switch Thermal Switch

The HVAC Thermal Switch is a temperature-activated safety and control device that automatically opens or closes electrical circuits to prevent overheating and to regulate fan operation, delivering reliable protection for HVAC equipment. Designed for widespread use in furnaces, rooftop units, air handlers, heat pumps, boilers, condensers, and other commercial HVAC systems, it supports high-limit protection, heat exchanger protection, and safety circuits that keep cooling and heating equipment operating within safe temperature ranges. Operation is automatic at a preset temperature, with reset types described as automatic reset (model dependent) or manual reset, and contact configurations available as normally open or normally closed depending on the part number, while temperature ratings vary by part number. Mounting options include flange, surface, or probe mount; terminal types range from quick-connect to screw terminals; housings are made of metal or high-temperature thermoplastic; the product line encompasses assorted OEM and aftermarket thermal switches with common replacements such as Trane SWT01613, SWT01273, and Honeywell 2455R series.