Hello- I wanted to add to this (old) thread. I had an issue with the right door not opening and it making a grinding/buzzing sound. It ended up being a loose set of hex screw that caused the door to be too low on the motor. Got it tightened properly and it works great now.

The directions at the link above are as they should be- although toro1966 mentioned the green wire on LED #13 needs to be unplugged, this is addressed in step 8 where it has you instead disconnect the red half of the wire on the instead on LED 30. You can do it either way. I had to take mine apart twice so I tried each. Doesn't make much difference.

I will report back if the problem persists. I appreciate all of your assistance on the matter- this forum thread was very helpful.