Universal Compatibility: Suitable for use in liquid line and hot gas defrost applications across a wide range of refrigerant types

the BFK083S can be used in unidirectional systems

This HVAC pressure limit switch is factory-calibrated to a

the switch may be out of calibration or failing internally

which is a common "pro-tip" to increase reliability in high-cycle environments

Trane SWT1271 Limit Switch Universal Compatibility: Suitable for useThe 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