Refrigerator cycles off/on, comes on fully when condenser fan is unplugged
The fridge now works perfectly. I had to replace the main logic board. On closer inspection there was a resistor which had charring on the back and front of the board. Perhaps I could have replaced the resistor but I don't know what else might have been effected and I was running out of time.

This fits with the symptoms in that there were seemingly unrelated sub-systems effecting each other.