Was trying get codes,turned key on,turned mode screw all way clockwise waited 5

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seconds,turned screw all way back.Light flashes 4 times about every 10 seconds Found that if you turn key on turn screw clockwise while you are waiting 5 seconds light starts flashing 1 2 3 4 5 Then repeats, then if you turn screw back counterclockwise it goes back to 4 flashes every 10 seconds.