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Suitable for compatible R-410A residential and light commercial HVAC systems
For contractors performing an AC repair or system overhaul
If the system detects a drop in pressure below the calibrated set point—often caused by venting obstructions
How do I verify if my 180997-1 is faulty
Lochinvar & A.O. Smith 100109522 Switch 320788-703 Suitable for compatible R-410A residentialThe 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
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