Lochinvar & A.O. Smith 100289391 Pressure Switch 320720-756 ensuring exact bolt-pattern alignment and

ensuring exact bolt-pattern alignment and harness compatibility

Ensure proper sensing bulb placement and insulation during the vacuum and charging process to maintain peak thermal regulation

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

The kit includes a high-grade Nichrome resistance coil designed for durability and consistent thermal output

Lochinvar & A.O. Smith 100289391 Pressure Switch 320720-756 ensuring exact bolt-pattern alignment andThe 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