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When does my freezer go through the defrost cycle?

I have a kenmore elite frost free freezer, model #253.26082100. I would like to know when the freezer is going through the defrost cycle, how much the internal temperature of the freezer changes. We store reagents and samples in our freezer that are small in volume, on the order of microliters or less than a single drop from an eyedropper. These are very sensitive and will degrade if they are constantly thawing and freezing. So I want to make sure that when the freezer is going through its defrost cycle that our reagents and samples are not constantly thawing and freezing. Thanks.

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Kenmore , Refrigerators , Appliances
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6 Answers from these members:
scott d
Jim, thank you for using Manage My Life.
by scott d Earned 3,139 community points in Kenmore
July 24th, 2013
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Manage My Life
OK. Thanks for the help.
by Manage My Life
July 11th, 2013
Answered in 24 hours
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scott d
Jim, with such a small amount, yes it would be possible the samples could thaw and refreeze. The defrost system cannot be eliminated in this freezer. I would suggest checking into a freezer that does not have the auto defrost feature.
by scott d Earned 3,139 community points in Kenmore
July 11th, 2013
Answered in 23 hours
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Manage My Life
Because it is critical that our reagents and samples not thaw, becuase it will destroy them, and that there is such a small volume in each container, what is the likelihood of the samples and reagents thawing out and refreezing? If there is a probability they may thaw and refreeze can the frost free cycle be disabled to prevent our samples from thawing?
by Manage My Life
July 11th, 2013
Answered in 23 hours
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scott d
Thank you for your question. I can understand your concern about the temperature and defrost cycle. The information you have received, is very good. The temperture rise can and will vary and the type and amount of the load will be what it depends on. Now, there is no set time period when the unit will go into the defrost cycle. This has an adaptive defrost system and it will vary depending on the compressor run time and also the length of time the defrost cycle lasted. It can also depend on the number of door openings. It may go into a defrost cycle only once a day or it could be more often. I hope this will help you.
by scott d Earned 3,139 community points in Kenmore
July 11th, 2013
Answered in 16 hours
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Manage My Life
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by Manage My Life
July 10th, 2013
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