My fridge temperature can't seem to get below 50 degrees, the freezer seems to be holding its own at 0. I checked all the thermistors with a meter and the self dioagnostic test, all are good. The evap and condenser fans (I had to replace the main board about 6 months ago because the condenser fan output died) are running. The compressor is running (Hot to touch). The defrost heater ohmed out good. The only problem I can seem to find is that the damper may not be working properly, the air flow into the frdge does seem a bit low. I can hear the damper stroke when I force it with the diagnoistic test. The only test it didn't pass was measureing 6VDC between J3-1 and J3-4 for the first 10 seconds after power up. What am I missing, do i have to buy another mainboard after just 6 months?