This is a Brand New Upgraded York/Luxaire/Coleman Furnace Control Circuit Board. The York/Luxaire/Coleman Part # is 331-03010-000 (also S1-33103010000).
This Board replaces all control boards in furnaces where the Model # begins with one of the following prefixes: GY9 GF9 GM9 P1UK PAKU P2MP P2MPV P9MP P2UR PBLU P2LN P2DP P3UR PCLU P1CX PACR XED P(12)CD P(AB)ND XND DGD GDD P3HU P3GEB GUD DGU PCUH P1DU FL8 P3UR G9T FG9 P23DN P3DH PCDF P2DR PBLD PBKM PBKD P1CK PACE.
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.