Lochinvar & A.O. Smith 100111020 Blocked Inlet Switch

The Lochinvar & A.O. Smith 100111020 Blocked Inlet Switch is a safety component used to check the air inlet in HVAC systems, especially in water heaters and boilers. It functions by sensing blockages in the air inlet so that conditions such as incomplete combustion or carbon monoxide generation are not reached. If there is a blockage, the switch shuts down the system to guarantee that it is safe to use. This switch is used in averting constricted air flow and in ensuring that the equipment doesn’t get damaged due to lack of proper amount of air. Its main advantage is the increased reliability and service life of home or office heating systems.