Description
Protect your furnace and HVAC system with the genuine Trane SWT1277 Thermal Limit Switch, a reliable OEM safety device designed to monitor operating temperatures and prevent unsafe conditions. This automatic reset limit switch detects abnormal heat and interrupts the electrical circuit when temperatures exceed preset thresholds, helping safeguard internal components and maintain efficient system operation.
Key Features
- Automatic Thermal Protection: Opens the circuit at approximately 145 °F to shut down the system before overheating occurs and recloses at 115 °F as temperatures cool, preventing repeated nuisance trips while protecting the furnace.
- OEM Trane Quality: Built to factory specifications for dependable performance and a precise fit in compatible Trane and American Standard HVAC systems.
- 3″ Insert Length: Designed with a standard 3 inch insert for secure placement in blower or heat exchange housings where accurate temperature sensing is essential.
- Robust Construction: Durable components ensure consistent safety operation across multiple heating seasons.
- Easy Replacement: Direct OEM replacement — swaps in for original limit switches to restore correct temperature protection without modification.






