Do Chest freezers have a defrost cycle?

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Old 04-09-13, 08:03 AM
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Question Do Chest freezers have a defrost cycle?

Just wondering if chest freezers (basement type, no fridge section)have a defrost cycle like a refrigerator?

Do they use a timer/defrost switch & heating element to defrost the evaporator coils like a fridge?
 
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Old 04-09-13, 08:27 AM
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No.....most, if not all, chest freezers do not use a defrost system.

The reason they don't use a defrost system is because the constant unthawing will reduce the storage life of the food. A chest freezer is good for long term frozen storage.

I recommend that the unit be turned off, unthawed and cleaned once a year to keep running efficiently. Of course if it gets iced up it will need to be done sooner.
 
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Old 04-09-13, 08:33 AM
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Thanks PJ,
Appreciate the quick reply

One more quick question, how do they keep the evaporator coils from icing up?

Do they not ice up because a deep freeze cycles far less than a fridge?
 
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Old 04-09-13, 08:44 AM
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They have a defrost system in a refrigerator/freezer combo because they expect the doors to be opened many times letting in warm humid air.

In a storage freezer the door most be opened as little as possible. If the door to an ice chest is left open.....you will get a giant block of ice in the bottom.
 
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Old 04-09-13, 10:04 AM
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Thanks again PJ,
Really appreciate you taking the time to answer my questions!
 
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Old 04-09-13, 11:36 AM
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In most chest freezers I've seen, the evaporator tubing is bonded to the metal inner liner shell of the freezer, and indeed does frost/ice up. Chest freezers do not use a separate evaporator/fan assembly as do refrigerators and frost-free upright freezers.
 
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Old 04-09-13, 08:03 PM
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Just a general side note here....don't buy a frost-free upright freezer if you want good, long term storage. The defrost cycle will partially unthaw food resulting in much shorter storage time.
 
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Old 04-11-13, 08:50 PM
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Thanks guys, oh and good tip on the frost-free upright freezer!
 
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