reducing manual service calls

while the built-in thermal expansion bypass provides critical protection against pressure spikes caused by water heating

89 lb unit is precision-balanced to minimize harmonic vibration

the pilot flame not staying lit

this specific model is a direct acting unit configured for low limit applications

Lochinvar & A.O. Smith 100109522 Switch 322838-753 reducing manual service callsThe Lochinvar & A. O. Smith 100109522 Pressure Switch is a critical safety component designed for precise pressure monitoring in high efficiency boilers, furnaces, and water heaters. This SPDT pressure switch (Single Pole Double Throw) features a fixed set point, typically calibrated to 0. 95 WC, ensuring that the combustion blower is moving sufficient air before the ignition sequence initiates. As a genuine OEM replacement part, the 100109522 is