Lochinvar & A.O. Smith 100208378 Pressure Switch 322056-301 or a ruptured internal diaphragm

or a ruptured internal diaphragm within the SWT2532 itself

The Peco Controls TB155-046 is a professional-grade fan coil thermostat designed for high-performance HVAC 2-pipe and 4-pipe systems

this kit ensures the integrity of the valve seat and internal seals

A standout technical feature is the integrated sensitivity adjuster

Lochinvar & A.O. Smith 100208378 Pressure Switch 322056-301 or a ruptured internal diaphragmThe Lochinvar & A. O. Smith 100208378 Pressure Switch is a critical OEM safety component engineered for precise airflow monitoring in high efficiency boilers and water heating systems. This switch is factory calibrated to a 4. 10" WC (Water Column) set point, ensuring the inducer fan generates sufficient negative pressure for safe combustion. As a direct cross reference for part 100166100, it serves as a standard replacement for several Lochinvar