Frost-free freezers

helen.turner at nri.org helen.turner at nri.org
Thu Nov 19 07:41:17 EST 1998


In article <dmicklem-ya023080001911980004430001 at nntp.stanford.edu>,
  dmicklem at cmgm.stanford.edu (David Micklem) wrote:
> In article <365364DA.29359C2D at itsa.ucsf.edu>, Philip Coffino
> <pcoffin at itsa.ucsf.edu> wrote:
>
> >Our 18 year old freezer just died this week.  We are in the market for a
> >new NON-frost-free freezer (with attached 4 degree space) and have come
> >across the problem that most, if not all, suppliers carry frost-free
> >versions.  Does someone know of a brand or supplier who still makes
> >NON-frost-free freezers??
>
> If you can't find a real non-frost-free freezer, you should be able to
> 'sabotage' a frost-free one:
>
> A little poking about and following of wires on a frost-free freezer
> reveals that the frost-free part is controlled by a small time switch that
> appears to operate for about 15mins once per 24 hours. During this 15 min
> period, the thermostat is prevented from triggering the compressor, and
> power is supplied to a heating wire within the freezer (and a fan to blow
> the air around).  The timer is driven by a small motor, and if you remove
> the power to the motor, the 'frost-free' period will never happen (at least
> as long as you don't kill the motor during those 15mins).
>
> Caveat: I've only looked at 2 frost-free freezers. Both were European
> models. Neither were lab freezers, and I wasn't trying to sabotage the
> frost-free feature. So I could be horribly wrong, but I don't think I am.
> Also, this might be dreadfully unsafe (but again I don't think it is unless
> you disconnect the little motor while the power is on). If you can get
> through to someone in the technical services department of one of the
> manufacturers, they could probably tell you...
>
> David
>
> --
> D.R. Micklem,                            Time flies like an arrow...
> Beckman Institute,                   Fruit flies like a banana.
> Stanford, Ca 94305 USA           Email:dmicklem at cmgm.stanford.edu
> Unsolicited mail will incur a US$100 processing charge.
>

You should be able to buy a non-frost-free freezer through some of your
lab-supplies companies, although it will doubtless cost you more than a
frost-free one....

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