The refrigerator/freezer in our basement started to act up by not keeping things cold enough. The evaporator was significantly frosted up. I am sure I have a defrost problem. After reading similar posts for the same model I ruled out the thermostat, which I tested with an ohmmeter. It is closed when frozen and opens when not frozen.
That leaves me with either (1) the adaptive defrost control board, or (2) the heating element. I took a ohmmeter to the heating element after disconnecting one side and it registered 0 ohms. Does 0 ohms suggest a problem or is this normal?
My suspicion is that it is the adaptive defrost control board as about two months ago we had several inches of water in the basement, however the refrigerator never went out. I did have to replace the same board in 2008 in a similar incident but then the refrigerator would not turn on and there was clear damage on the board (burn marks). None now. Also, I cannot manually put the fridge in defrost mode, following the instructions.
My main question is whether 0 ohms on the heating element is normal. Also looking for confirmation on my suspicion the board is at fault.