If the pressure exceeds the calibrated limit

The Carrier 306621-752 Pressure Switch Kit is the professional-grade solution for restoring the safety circuit in Carrier

it offers exact physical and electrical compatibility with existing mounting brackets and wire harnesses

Precise Ignition Control: Orchestrates the full combustion cycle

Always confirm the specific part number on the existing board before installation

Lochinvar & A.O. Smith 100112396 Control Board 324846-701 If the pressure exceeds theThe Lochinvar & A. O. Smith 100112396 Control Board is a critical OEM replacement part designed for high efficiency hydronic and domestic hot water systems. This integrated furnace control manages the essential ignition sequenceincluding hot surface ignitor activation, flame induction, and gas valve modulationto ensure stable combustion and precise thermal management. Engineering for the Lochinvar Knight and A. O. Smith boiler series, this printed