A light dusting of frost is normal; sheets of ice are not. Here is what drives excess frost and how to stop it.
Door Left Ajar or a Bad Seal
Humid room air rushes in whenever the door is open or poorly sealed, then freezes on the coldest surfaces.
Fix: Check the gasket and make sure nothing blocks the door from closing fully.
Failed Defrost Heater or Thermostat
Auto-defrost fridges melt frost periodically; when that system fails, ice accumulates on the evaporator.
Fix: Replacing the defrost heater or thermostat restores normal operation.
Frequent or Lengthy Door Openings
In a humid climate like Dallas, long door openings load the freezer with moisture.
Fix: Decide what you want before opening, and keep the freezer reasonably full to stabilise temperature.
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