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Unfortunately this is a control board issue if unplugging the dryer resets the issue---if the touchpad was bad it wouldn't reset from unplugging it. The part number you'd need to order is 33003028 and below is a link to the part.
CLICK HERE for control board
Other than that, if you're handy you can definitely replace the part yourself. Just unplug the dryer, remove the screws coming in from the back of the control panel and remove the control panel. The board is just held in by 4 screws (one in each corner). Then unplug the wire connections and the ribbon cable between the touchpad and control board and install the new board. Takes about 20-30 minutes.
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