Icemaker
Tips
(Have a baby bottle?)
(Excerpted from The DRSNews, December
2002)
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Anybody know what babies and icemakers have in common?
Well, OK, maybe not much, but they do share one very handy item. 80% of all the icemaker problems
you'll see can be corrected using a baby bottle!
Icemakers are set to fill for X seconds regardless of actual water flow, and the volume of water
required is specified in cc's. It just happens that a baby bottle's a really handy icemaker repair
tool, because it is graduated in cc's! And it's compact enough to fit into those cramped freezer
spaces where icemakers reside. Not to mention it's always good for a few questioning looks (techs: leave the nipple on, carry it in plain view in your tool bag, and see what happens!)
But I digress. If your icemaker is producing small cubes, hollow cubes, huge
cubes, or a solid slab of ice, one of the first things you want to check is the fill level. And it's not as difficult as you
might think. (Hey, the hard part's wrenching that bottle out of Pookie's little fingers!) Unplug
the refrig, pull the icemaker - usually one screw underneath, either 2 more or hooks above the
cube mold - and unplug it. Take it to your sink and melt out any cubes with hot water. Then plug
it and the refrig. back in, leaving it unattached from the freezer wall.
Manually start a 'harvest cycle' (see below) and hold Pookie's bottle under the fill tube. You'll have to wait a few minutes,
because the water enters near the end of one complete rotation of the cube ejector, which
constitutes a 'harvest cycle'. Regardless your type of icemaker, you're looking for 130-150 cc's,
with most working best around 145cc's, but anywhere in this range should work OK.
(When replacing your icemaker with a new one, always
check and adjust the water fill level this way too. You'll save yourself
a lot of trouble.)
Manually starting a 'harvest' cycle:
Two basic designs of domestic, analog icemakers are most common. (Electronic models come &
go from time to time - shudder - but we aren't seeing them in great numbers - yet)
Pop the front cover off yours and check the large gear front & center. If
the front plate is metal, and you see a Phillips screw
in the center of this gear, that's great - you own a 'microswitch'
design. This is one of the most
reliable units ever made! Here's what it looks like with the front cover
off:
To manually start a cycle, either grasp the ejector and rotate
upward (CW fr. front), or use a screwdriver to turn the smaller gear (CCW) if yours has a slot for
this. Once you turn it a short distance, you'll hear a little 'click and the unit will start to run. Make sure the ice-sensing bail has clearance to raise & lower during this test cycle.
If there's no screw, that's OK too, you own a 'modular' unit, and even though we, um, make more
income from these <grin>, they're still pretty decent. Here's what a
modular looks like with the front cover off:
To start a cycle with this one, don't attempt
to turn the gears manually! You'll need a short piece of insulated solid copper wire, 12-14 gauge.
(Just strip a 4 in. piece out of some 12-2 'romex' used in house wiring.) Strip the ends back about ¾ in. and bend it into a 'U' shape. This wire is inserted into the holes marked 'T'
and 'H' in the front of the icemaker to bypass the tstat and run a cycle. (don't insert it into any holes except 'T'
& 'H' !) Remove the jumper after a few seconds (or the heater will stay on), and let it run, waiting
for the fill at the end. Again, make sure the ice-sensing bail has clearance to raise & lower during
your test cycle.
Note: I stress this jumper wire needs to be insulated, because you're briefly jumping 120V here.
The usual precautions apply (see the disclaimer
page).
Both icemaker styles have a small screw to adjust water levels. The modular type has very little
adjustment available, though, which means the other components in the water supply have to be
right (saddle valve installed properly - not to bottom of pipe, etc - clean fill valve screen, etc.) Just rerun a test cycle after each
adjustment. And be sure to wash & return Pookie's bottle when finished with the test.
Copyright 2004 www.DavesRepair.com
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in its entirety, including this message.
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