Lochinvar & A.O. Smith 100271883 Pressure Switch 321042-401 this is a non-fused disconnect

this is a non-fused disconnect designed to serve as a local safety shut-off for downstream equipment like air conditioners and refrigeration units

While designed as an OEM Goodman Amana part

EB100) burners

Always verify 24VAC at the transformer before condemning the board

which often indicate worn bearings

Lochinvar & A.O. Smith 100271883 Pressure Switch 321042-401 this is a non-fused disconnectMaintain peak combustion safety with the Lochinvar & A. O. Smith 100271883 Pressure Switch, a critical OEM component designed for low gas pressure monitoring. As a veteran grade K low gas pressure switch, this device acts as an essential safety interlock, continuously sensing the inlet gas supply to ensure it meets the minimum operational threshold of approximately 3. 1" W. C. If the supply pressure drops below the setpoint, the internal contacts