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Posted by on April 5, 2007, 9:07 am
Hi, this is a correction of my original post, to fix some broken links to
the pictures posted. Please reference this post instead. Thanks.
HP
bipster@comcast_diespam_.net wrote:
>
>Hi all. Am hoping I could get some help in troubleshooting an old freezer.
>
>Make: Admiral
>Model: F1073, upright manual defrost
>Year: early 1980s
>
>Problem: Excessive frost buildup requiring weekly defrost
>
>http://i17.photobucket.com/albums/b65/emote623/Freezer_make.jpg
>
>Freezer make.
>
>http://i17.photobucket.com/albums/b65/emote623/Freezer_ceiling_n_top_shelf.jpg
>http://i17.photobucket.com/albums/b65/emote623/Freezer_process_tube1.jpg
>http://i17.photobucket.com/albums/b65/emote623/Freezer_process_tube2.jpg
>
>Main areas of frost build-up are at the ceiling and the underside of the
>top shelf, along with the process tube (tube1 is the segment beneath the
>top shelf, tube2 is the segment beneath the middle shelf).
>
>http://i17.photobucket.com/albums/b65/emote623/Freezer_top-n-middle_shelves.jpg
>
>Note that there is no frost buildup under the middle (or the bottom) shelf.
>
>I have no experience in appliance repair, but am a technical sort, and have
>a multimeter handy. Have borrowed a bunch of books from the library on
>appliance repair, but none give any specific steps on troubleshooting a
>freezer with excessive frost buildup. But they do give some general guide
>on things to look for.
>
>Steps taken:
>
>. Put a thermometer (in cup of veggie oil) in freezer to measure temp.
>Temp seems to be at -10 to -15 degree F, which according to the books is
>probably too cold (they cite a range of -10 to 10 degree F). The
>temperature control knob is already set at the minimum setting without
>shutting it off (there is a click before getting to the off position, and
>the motor does turn off when I turn the knob to the off position).
>
>. Visual inspection of the surrounding seals seems OK, other than this
>spot
>
>http://i17.photobucket.com/albums/b65/emote623/Freezer_seal.jpg
>
>I tried that particular spot with the dollar bill test (i.e. put a dollar
>bill in between and see if it can slide in/out easily), and the seal seems
>to hold up.
>
>Some books talk about a thermostat, but apparently that's only for
>auto-defrost models. One book does show a thermostat element for manual
>models that's underneath one of the shelves, but I didn't find anything
>like that. My assumption is that this manual model doesn't have one.
>
>My next step is to pull the temp control housing and check for resistance
>at the highest (little to no resistance) and lowest (high resistance)
>setting. My hope is that it is the culprit, and I can just replace this
>item.
>
>The books also recommend cleaning out the condenser coil (at the back of
>the freezer, not the bottom). I don't see any excessive dust build-up on
>it, however.
>
>Aside from the temp control, and more thorough checking of the seals, I'm
>not sure what other areas to try for this particular issue. I hope that
>someone here can provide more advice for me. Thank you in advance.
>
>HP
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