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When diagnosing a unit heater fan failure
Always verify the refrigerant used in the existing system before replacement
Ambient Temperature Compensation: Ensures consistent timing accuracy across varying mechanical room temperatures for reliable lube oil protection
you should verify the voltage tolerance of the coil
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
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