Lochinvar & A.O. Smith 100110973 Blocked Flue Switch

The Lochinvar & A.O. Smith 100110973 Blocked Flue Switch is an essential safety switch that is used in different types of HVAC equipment such as water heaters and boilers. This switch checks the flue system for blockage and checks that it is correctly venting the hazardous exhaust. If the flow of water is interrupted, the switch turns off the unit to protect your home from possible leakage of carbon monoxide. It improves performance and durability of a system and therefore is crucial for safe efficient heating solutions.