Lochinvar & A.O. Smith 100109973 Switch 319847-401 this kit is compatible with

this kit is compatible with standard 1

mineral buildup around the discharge port

the 803112802 ensures the HVACR system safety and compliance with rigorous industrial standards

If the switch opens before the 220°F threshold or remains open after the unit has cooled significantly

and PDP series heaters

Lochinvar & A.O. Smith 100109973 Switch 319847-401 this kit is compatible withThe Lochinvar & A. O. Smith 100109973 Blocked Inlet Switch is a critical safety component designed for high efficiency condensing boilers and water heaters. As a normally closed air pressure switch, its primary function is to monitor the intake system for airflow restrictions. If the intake air connection screen becomes clogged or the vent piping is obstructed, the switch detects a fall in pressure and opens the electrical circuit, instantly shutting