Lochinvar & A.O. Smith 100110887 Switch 319848-301 When diagnosing a unit heater

When diagnosing a unit heater fan failure

Always verify the refrigerant used in the existing system before replacement

Using a genuine Reznor unit heater part ensures that the static pressure and airflow profiles remain within the manufacturer's original design parameters

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

Measuring approximately 13

Lochinvar & A.O. Smith 100110887 Switch 319848-301 When diagnosing a unit heaterThe 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