My GE Monogram built-in moans when running and the door is closed. Actually if the door is open and I press the switch to turn off the light, it starts to moan.

I suspect its the control board. Any other suggestions before I plopped down $150 to replace that?

If the control board, what is the most likely cause of the moan - perhaps it is a part that can replaced on the board.

Model # ZISS480D just over 5 years old.