preventing hazardous operation during maintenance

90-degree brass elbow specifically engineered as an OEM replacement part for Reznor unit heaters and duct furnaces

Avoid mounting with the sample line connections pointing "up" to prevent moisture or debris accumulation from affecting the diaphragm's sensitivity

ensuring operational stability in high-ambient environments found in commercial ranges

the switch may be out of calibration or failing internally

Trane SWT1271 Limit Switch preventing hazardous operation during maintenanceThe Trane SWT1271 is a critical furnace high limit switch designed for HVAC system diagnostics and thermal protection. As a standard OEM replacement part, this auto reset limit switch prevents the heat exchanger from reaching a hazardous open temperature of 180F, cutting off power to the gas valve until the unit cools to its 150F reset point. For technicians troubleshooting furnace short cycling or 4 flash error codes on a Trane or American Standard