this integrated furnace control manages the heating ignition sequence and the cooling fan speed via the "Y" terminal for comprehensive climate control

verify the wiper arm alignment on the potentiometer slide wire

The York S1-025-17620-705 is a critical HVAC low pressure switch engineered as an OEM replacement part for York

As a single piece component

Lochinvar & A.O. Smith 100109909 Gas Control 326010-701 this integrated furnace control managesThe Lochinvar & A. O. Smith 100109909 Gas Control assembly is a critical OEM component engineered for high recovery commercial water heaters and boilers requiring precise fuel regulation. This unit serves as the direct 9004521205 replacement gas valve, specifically designed for Generation 3 and 4 burners. As a combination control, it integrates a redundant solenoid valve with a high capacity pressure regulator to maintain stable manifold pressure