I have a Maytag french door refrigerator that is acting erratic. It started when the fridge stop cooling. The fan was still running but the compressor would not come on. I checked the capacitor and relay and both are fine. I searched all over for a defrost timer to see if it was stuck in defrost mode. I could not find one which leads me to think that it is electronic. There is a large circuit board (about 6" x 8") on the back left side at about waist level. I put everything back together and plugged it back in and it started working again.
Any ideas of what the problem might be?

I can't get anything to come up with that model number. Could you recheck it and read it of the model tag on the machine.

That model has a service diagnostic test built into the control board. You'll need your tech sheet for the correct steps and component tests. Look behind the lower kick plate on the right side. It may be taped to the bottom of the machine in an envelope. It may also be inside the control housing.

I found the tech sheet taped under the front right corner under the fridge but it has no instructions on how to get into the service mode. I checked the control board and there are no switches. I assume that it is probably a combination of button pushes and/or holds on the front panel but I have know clue where to start. I've tried several combinations but nothing.
Any ideas?

Ok, I found a service manual online that gave me instructions on how to get into the service mode. The only thing I've tried so far is to set the defrost mode to factory default. That didn't work. What puzzles me is that after the fridge is unplugged for awhile the compressor will start working and it will cool down to normal temerature. Sometime overnight it stops working because when I get up in the morning the fan is running but not the compressor and it is over 60 degrees in the fridge compartment. It seems to me that if it were a themostat or sensor that has failed that it would never start to begin with or run forever. I hate to spend the money for a new control board without knowing that that is the fix but I'm not sure what to test. Any ideas would be greatly appreciated.