check for continuity across the terminals when the switch is cool

Cleaning or replacing the trap often resolves these furnace pressure switch errors

The unit features a user-selectable toggle

such as the 12A09 or 12A39

Effective condensate management ensures dry steam and prevents water hammer damage

Lochinvar & A.O. Smith 100110784 Anode 321142-301 check for continuity across theThe Lochinvar & A. O. Smith 100110784 Anode is a critical sacrificial magnesium anode rod engineered to provide superior cathodic protection for residential and commercial water heater tanks. This flexible 48 inch anode rod features a 3 4 inch NPT threaded hex head connection, ensuring a secure and watertight fit across a broad range of A. O. Smith, Lochinvar, and State Industries units. Designed for installations with limited overhead clearance, the