Lochinvar & A.O. Smith 100289391 Pressure Switch 320720-756 this genuine OEM pressure switch

this genuine OEM pressure switch prevents the burner from firing if unsafe venting conditions

Using a genuine Bard HVAC control board ensures the safety circuits and blower delays function according to the original equipment design

Whether you are addressing bearing failure or a lockout code

ensuring exact bolt-pattern alignment and harness compatibility

allowing for discharge air monitoring and optimal start recovery based on ambient conditions

Lochinvar & A.O. Smith 100289391 Pressure Switch 320720-756 this genuine OEM pressure switchThe Lochinvar & A. O. Smith 100289391 Pressure Switch is a critical safety component engineered for high efficiency condensing water heaters and commercial boilers. Calibrated to a 0. 55" WC (Water Column) set point, this direct replacement for 100294588 monitors the induced draft blower to ensure proper venting of combustion gases. In the field, this switch is the primary defense against blocked flue conditions and inducer motor failure, preventing