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Posted on Apr 29, 2010
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My sub zero 642 just starting making a humming

My sub zero 642 just started making a loud humming sound in the freezer. When the door opens it stops, what could be causing this?

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  • Posted on Apr 29, 2010
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I know this sounds so stupid but I see this sort of thing at least once a week it's vibrating on cab. Or the main thing is a bolt came loss and when you open the door it aplies weight down and it will make the bolt or nut vibrate being a sub zero it could be the compresser on top or the trim or the cabinet virating on back of shell. Hope this helps

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  • Posted on Apr 29, 2010
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It is your evaporator fan. When the door opens power is cut to the fan motor.

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Thanks,
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Left freezer draw open overnight on Sub-zero. Freezer fan now running loud. Used hair dryer to thaw any frost build up. Fan stopped making noise for a while. Next day started to make noise again?

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