and high-integrity O-rings ensures an airtight seal and reliable pressure regulation

protecting the furnace heat exchanger and surrounding electrical components from corrosion

typically in the thermostat wiring or a failing contactor coil

Manual Reset Security: Requires a physical inspection by a technician before the unit can be placed back into service

Whether you are performing a reversing valve troubleshooting task or a full system overhaul

Trane SWT2978 Pressure Switch 322838-754 and high-integrity O-rings ensures anThe Trane SWT2978 is a heavy duty dual pressure switch engineered for precision safety monitoring within residential and commercial HVAC units. This OEM replacement part is built to monitor critical pressure thresholds, providing a vital safeguard for the compressor and combustion blower. Operating on a 24V AC power supply with an 18A current rating and 28VA pilot duty, it ensures reliable electrical signaling to prevent system strain during high or