A thin layer of frost is nothing to worry about; sheets of ice are. Here's what typically drives excess frost and how to bring it back under control.
Door Left Ajar or a Bad Seal
Every time the door sits open or fails to seal properly, humid room air rushes in and freezes onto the coldest surfaces inside.
Fix: Inspect the gasket and clear away anything that might be blocking the door from closing all the way.
Failed Defrost Heater or Thermostat
Auto-defrost refrigerators are designed to melt off frost on a schedule; once that system breaks down, ice just keeps accumulating on the evaporator.
Fix: Replacing the defrost heater or thermostat brings the cycle back to normal.
Frequent or Lengthy Door Openings
Along the Gulf Coast, outside air carries a lot of moisture, so every extra second the freezer door stays open loads the compartment with humidity that turns straight to frost.
Fix: Plan out what you need before opening the door, and keep the freezer reasonably full — a fuller freezer holds its temperature better and limits how much humid air gets pulled in.
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