How do i defrost my metalfrio msc-66c chest freezer?

On a chest freezer, frost always accumulates around the top perimeter first because the warmer moist air comes in contact with that area first once the door is opened. More frequent defrosting may be the answer.

Chest freezers are manual defrost. Which mean yall unplug it to defrost it.

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normally it is an ice build up on the inside. Suggest overnight defrost to sort this problem out.

Chest freezers don't normally self defrost. They just freeze. To defrost them, you must shut them off.

See this article for a good description.

I am not aware of a chest freezer that is auto defrost.Go ahead and defrost it like you would any chest freezer. Eric

If all is ideal maybe -10 an occationally -15 and this is F considerable coolder than -20C. ALSO fyi a chest freezer will stay at or below these temps better than an upright and especially a self defrosting model. Because a chest freezer you dont loose all the cold air when you open the door. TYhey are not made in auto matic defrost as far as I know (never have seen one but then I havent been looking for one either. An up right freezer can be manual defrost or automatic. but the cold air falls ouit every time the door is opened.

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The reason this happens is because the defrost timer is not turning back on when it needs to, causing the freezer to thou out and overfill the drip tray sitting on top of the compressor. A new defrost timer should be available from the local refrigeration wholesalers in your area.

check the defrost timer, defrost limit, and defrost heater.