Freezer burn happens when moisture leaves frozen food and turns to frost, leaving dry, discolored patches. Loose packaging is the usual cause, but if it appears quickly across a lot of food, the freezer itself may be letting in warm air or swinging in temperature.
Quick diagnosis
| Symptom | Likely cause | First thing to try |
|---|---|---|
| Dry gray-brown patches on meat | Air touching the food's surface | Wrap tightly and press out as much air as possible |
| Frost crystals inside sealed bags | Temperature rising and falling | Put a thermometer in the freezer and check it over a day |
| Burn mostly on food near the door | Door area runs warmest and opens most | Keep long-term items at the back |
| Frost along the door edge, burn everywhere | Door gasket not sealing | Close the door on a strip of paper and feel for drag all the way around |
| Ice cream gummy or icy | Partial thawing and refreezing | Store it at the back, never in the door |
A closer look
Packaging and air
Any air pocket gives moisture somewhere to go. Thin grocery store wrap is fine for a few days but not for months. Freezer bags with the air pressed out, tight wrapping or vacuum sealing all help, and so does dating packages so older food gets used first.
Temperature swings
USDA recommends keeping a freezer at 0°F. Auto-defrost freezers warm slightly during their defrost cycles, which is normal and brief. Bigger swings come from frequent door openings, vents blocked by packed food, or a defrost or fan problem that lets temperatures drift. Each rise lets a little moisture leave the food; each drop freezes it as frost.
Door seals
A gasket that's torn, flattened or pulling away at a corner lets warm, moist air leak in all day. You'll often see frost building along the door edge or on the packages closest to the leak. Clean the gasket with warm soapy water first; a dirty gasket sometimes just isn't sticking.
Loading and airflow
Cold air has to circulate. Food stacked against the vents or the back wall blocks it, leaving warm pockets. Leave some space around the air openings.
Why Houston homes see this more
Every time a freezer door opens here, humid air rushes in and leaves its moisture behind as frost. Garage freezers have it harder still in summer, cycling against hot air for months. More moisture and harder-working freezers both show up as freezer burn.
Prevention checklist
- •Keep a freezer thermometer inside and check it now and then
- •Wrap food tightly and date every package
- •Keep door openings short
- •Clean door gaskets monthly
- •Don't block the air vents with food
Time to call a pro
- •The freezer can't hold 0°F even with the door closed
- •Frost keeps building on the back panel or floor
- •The gasket is torn or the door won't seal after cleaning
- •You can't hear the evaporator fan running when the compressor runs
Travis's rule of thumb: One burned package is a wrapping problem. A whole freezer full of it is an appliance problem.
Freezer that can't hold 0°F? Visit our freezer repair page or call ProFix Houston at (832) 552-1615. A gasket that won't seal often grows mildew too, one of the hidden sources of a refrigerator smell.