It is frequently found in Armstrong

Does this unit replace 2-wire or 4-wire sequencers

It stands for Automatic Changeover

The manual reset functionality

York S1-7990-6451 Inducer Assembly R-410A It is frequently found inThe York S1 7990 6451 Inducer Assembly is a high performance draft motor designed for direct replacement in specific York, Coleman, and Luxaire gas fired furnaces. This 120V, single stage centrifugal blower operates at 2950 RPM, ensuring positive pressure is maintained to exhaust combustion gases through the flue pipe effectively. Engineered to meet OEM specifications, this assembly features a robust motor housing and a precision balanced impeller to