Lochinvar & A.O. Smith 100110887 Switch 319848-301 you should verify the voltage

you should verify the voltage tolerance of the coil

When diagnosing a unit heater fan failure

Rapid Response Sensing: High-sensitivity capillary tube ensures accurate boiler water temperature monitoring

Ambient Temperature Compensation: Ensures consistent timing accuracy across varying mechanical room temperatures for reliable lube oil protection

it prevents hazardous conditions such as carbon monoxide buildup or heat exchanger damage caused by airflow obstructions

Lochinvar & A.O. Smith 100110887 Switch 319848-301 you should verify the voltageThe Lochinvar & A. O. Smith 100110887 Blocked Outlet Switch is a critical safety component engineered for BTH 400A Series 100 101 gas water heaters and compatible Lochinvar Knight boilers. This normally closed switch is calibrated to a 1. 39 inch water column, providing precise monitoring of the exhaust vent airflow. Designed to detect back pressure or obstructions in the flue, it serves as a fail safe by interrupting the 24V control circuit to the