Let us start at the beginning. Why did you change the board to begin with? What symptoms were you having? A lot of times when I change a GE board for the condenser fan motor not running I change the relay/overload as well. With the fan not running the relay is going to take a beating with all the heat not being dissipated.
I know that the board in your fridge has been problematic in that the compressor relay sticks on and the fridge never shuts off causing excessive frost. When I get a call such as yours I turn the fridge off at the control and see if the compressor stays running... if it does then slam dunk jazz board. I would also replace the p-trap kit Whirlpool has out for these fridges. Good Luck!