Lochinvar & A.O. Smith 100110886 Blocked Outlet Switch

The Lochinvar & A.O. Smith 100110886 Blocked Outlet Switch is a safety device fitted on water heaters and boilers to protect against hazardous conditions arising from blocked vents or flue outlets. It operates by sensing high pressure in the venting system and cycling the unit as a protection against overheating or combustion problems. This switch is used in residential and commercial HVAC systems to prevent equipment damage and endangerment of the user. It also helps to increase the durability of the equipment and keep heating system running at its best efficiency.