Help! Whirlpool side-by-side fridge # ED5VHGXML two years old. Freezer too cold and icing up - fridge section too warm. Defroster problem? No air blowing through top left vent inside fridge section. Where do I start and what to check? Thanks! I see the sticky notes about common 3 items to check defroster and will check timer first. Anything specific I should know about the Whirlpool? And I'm not good with continuity tester - can someone walk me through exactly how to use it? (analog tester) Fridge is barely two years old. Thanks!