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You can buy a kit that warms the temp sensor to keep the fridge running longer in the winter, keeping the freezer frozen. It is called a garage kit heating coil, google it.batboy said:I have the complete opposite problem, but I am surprised that you are having heat issues and that you got the advice you did from your "appliance friend."
Newer refrigerators are still generally well insulated and, with proper seals, the motor should not have to work too hard to keep up with heat and humidity in SC. Maybe you just need to clean your coils or service the motor; maybe you should check to make sure you aren't blocking the airflow or have it too filled up.
I have a top freezer unit in an uninsulated garage in the Mid-Atlantic US (hot, humid summers, cold winters) and wintertime is my problem. Due to the cold temps and the fact that most units have one thermostat for both the fridge and freezer, the colder it gets in the garage, the warmer it gets in the freezer! The motor simply doesn't kick in enough to keep the freezer frozen because the fridge is kept plenty cool due to the surrounding air. I lost serious $$$ the first time I figured out that the freezer won't truly freeze from November - March.
I do know that Gladiator by Whirlpool makes a line of refrigerators specially made for garages and uninsulated outdoor spaces. You may want to check them out.