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Scientific freezer Temperature Cycling

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Brand: Marvel Scientific Model: 17CAF 17CAF - Marvel Scientic Refrigeration This freezer is currently being used for a research experiment

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Old 08-20-2012, 08:14 AM
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Default Scientific freezer Temperature Cycling
Model Number: 17CAF   Brand: -brand-   Age: 1 - 5 years   

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Brand: Marvel Scientific
Model: 17CAF
17CAF - Marvel Scientic Refrigeration

This freezer is currently being used for a research experiment but cannot maintain a constant low temperature. In prior experiments the freezer would cool to approx -24 C and remain at that temperature for over a week before it was allowed to warm back to room temperature. Now however the freezer is cycling between -24 C and -11 C on an approx 1 hr cycle.

Both the temperature controller (Fridgidair 216788100) and the compressor have been replaced however the behavior continues. What would cause this type of behavior from a freezer. It was moved from one building to another before the temperature cycling started. Any suggestions would be greatly appreciated.

This problem was posted once before but a number of changes have occurred since then including the compressor being replaced. Sorry for double posting.


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