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helping to maintain legal CO levels and peak thermal efficiency
ensuring seamless valve stem and orifice alignment during reassembly
or the high-limit switch tripping due to insufficient heat dissipation from the unit heater heat exchanger
While designed to restrict access
Built for technical versatility
Lochinvar & A.O. Smith 100110810 Switch 320788-704 helping to maintain legal COThe 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