When should I replace the strainer basket

or a "pressure switch stuck open" error code on the furnace control board

it serves as a direct cross-reference for various brands under the ICP umbrella

and FAN3719

High-capacity compatibility: Rated for large boiler configurations up to 35

Lochinvar & A.O. Smith 100109676 Adapter 319848-301 When should I replace theThe Lochinvar & A. O. Smith 100109676 Adapter is a critical OEM replacement part designed for field technicians servicing high efficiency water heaters and boiler systems. This 4 pin to 5 pin adapter bridges the gap between different generations of control components, typically required when upgrading a hot surface ignitor or gas valve assembly on units like the A. O. Smith BTN 80 and BTN 100 or compatible Lochinvar Knight series. In the field, you