Designed for 3/4 inch NPT pipe threads

A functioning unit should consistently read between 25 and 35 mV when the hot junction is fully enveloped by the pilot flame

this component is essential for diagnostic safety protocols

and Comfortmaker furnace parts directories

or internal scale buildup that impedes float movement

Armstrong Furnace R47583-001 Control Board Freon Designed for 3/4 inch NPTThe Armstrong Furnace R47583 001 Control Board is a genuine OEM 2 stage ignition control board engineered for high efficiency heating systems. Designed for reliability in demanding environments, this integrated furnace control manages the complex ignition sequence and multi stage firing rates required by Armstrong Air, AirEase, Ducane, and Lennox equipment. This board features advanced electronic circuitry to ensure precise flame sensing and timing,