Lochinvar & A.O. Smith 100227399 Pressure Switch 320720-756 If your existing valve has

If your existing valve has the 100171898 or VAL2932 part number

The terminal designations (1

Standard industry practice dictates replacing the internal oil filter during any major HVAC system diagnostic or when oil analysis indicates high acid or metal counts

ensuring durability in harsh environments like cooling towers

Engineered to handle a wide range of refrigerants

Lochinvar & A.O. Smith 100227399 Pressure Switch 320720-756 If your existing valve hasThe Lochinvar & A. O. Smith 100227399 Pressure Switch is a critical safety component engineered for precise combustion air pressure sensing in high efficiency boilers and water heaters. As a normally closed (N. C.) pressure switch factory set to 2. 12" WC (Water Column), this OEM replacement part ensures the inducer motor is moving sufficient air for safe ignition and sustained burner operation. When troubleshooting a pressure switch stuck closed or