High Flow Capacity: Supports up to 295

or the control board failing to sense correct blower tachometer signals

For technicians performing system upgrades or HVAC control board repairs

excessive noise during cycle transitions

or beehives in the vent termination first

Lochinvar & A.O. Smith 100224394 Pressure Switch 320819-301 High Flow Capacity: Supports upThe Lochinvar & A. O. Smith 100224394 Pressure Switch is a critical safety component designed for high efficiency water heaters and HVAC systems. This air pressure switch is factory calibrated to a 1. 66" WC (Water Column) setpoint and features a Normally Closed (N. C.) contact configuration. As an essential part of the combustion blower assembly, this OEM replacement part monitors the negative pressure generated by the inducer fan to ensure proper