I have a three year old Whirlpool refrigerator and have an issue with the cooling. It is a standard freezer over refrigerator model and the freezer is getting cold, not as cold as I would like, but cold enough to freeze, make ice in the automatic ice maker, etc. The refrigerator section is only staying at about 52 degrees. I've vacuumed all the coils, unplugged the unit and let it thaw overnight but nothing has worked yet. Does anyone have any ideas what might be causing this? Worse case scenario, I'll call the appliance guy to come take a look.