wax motor
control board may have been damaged by "wax motor" heat pellet flashover-that
damaged the control board in the '98 MAH3000 i bought in non-operating condition
and fixed-had to replace a burnt out triac and resistor on the control board.
Shorted wax motor blowing out the control board is a common early neptune problem
-usually involving the door latch wax motor,(two more of the same wax motors are
on the dispenser-at least on 3000)the cause is the disc-shaped heat pellet that
warms the wax chamber of the"wax motor"is not insulated around the edge,with the
conductive faces only about 1/16" apart-this gets a little damp and "flashes over"
blowing up the triac(on control board)that drives it.On my neptune i carefully
took apart,repaired and insulated the original wax motor,but a new one can be
installed too LOL.The original flashover prone wax motor is reddish-brown in color,
i think the improved replacement wax motor is white in color.If you have a blown
triac on your control board,best to replace the wax motor too.