This is a brand new Honeywell Universal Intermittent Pilot Gas Ignition Module. This board is an upgraded replacement for many older Honeywell Controls control boards.
The control board is the "brain" of your unit, coordinating and executing the operation of other various components by sending voltage when and where needed. A control board is constantly monitoring sensors and safety switches in the unit.
S8600A S8600B S8600C S8600F