Lochinvar & A.O. Smith 100110810 Switch 320788-704 Built for technical versatility

Built for technical versatility

High-Durability Internals: Features all-stainless steel springs to prevent scale buildup and ensure consistent opening at set pressure

Direct Replacement Logic: Engineered as a drop-in replacement for the discontinued 1186625 model

or the high-limit switch tripping due to insufficient heat dissipation from the unit heater heat exchanger

Field-Proven Reliability: Molded synthetic rubber diaphragm provides consistent performance across the full 0 to 150°F ambient temperature range

Lochinvar & A.O. Smith 100110810 Switch 320788-704 Built for technical versatilityThe Lochinvar & A. O. Smith 100110810 Blocked Inlet Switch is a critical safety component designed for high efficiency gas water heaters and commercial boilers. As an OEM air pressure switch, this part is engineered to monitor differential pressure within the intake system. If the sensor detects an obstruction in the air supplycaused by debris, ice, or improper ventingit immediately breaks the electrical circuit to the control board, initiating a