The refrigerator made continous "whooing" sounds that increased and decreased in pitch. Sounded like a ghost. Would keep us up at night. Also noticed that the heater was not heating under the evaporator coils.

After checking the stories, the consensus of opinion was to change the mother board. I had a tremendous help from Tom Paone at quality@applianceeducator.com. He also told me to change the motherboard but to make sure that the coils were totally defrosted before starting up the refrigerator after changing the board.

Took off three nuts around the board at the back of the unit. Removed the input wires and you have to push in the plastic tabs holding the board in. Then just put the new board in place and push till the tabs click. Re-install the wires and put the cover back on.

Really simple task,

It is now a week since doing this and the unit is working perfectly. No soulds and good nights sleep. The ghost has moved on.