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caspery

Subzero icemaker

17 posts in this topic

1988 vintage Subzero 550 moved to our current home. Plugged it in. Hooked up the water. Icemaker filled and dumped a load of very white ice. Then the ice taped out. The second batch were tiny cubes and not numerous. No it's down to nothing.:shock:

I read your FAQs and changed out the self-tapping water supply valve and the solenoid filler valve. Nothing.

Since this icemaker is tight to the top of a bottom freezer there is no access to look in the top of the trays, etc. Somebody suggested filling the icetrays with a turkey baster  but there is no access.

Cap Offutt

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This could be a water pressure issue or a module that's flaking out.  If I were on the service call, I'd loosen the water supply tube at the water inlet valve underneath the fridge-- it's right behind the grill on the floor, tight space to work in but it's do-able and beats the snot outta pulling the whole fridge out!  If I get water starting to spray out, I know I have good pressure.  Towel off, tighten up, onward...

Next, I'd unhook the icemaker so I could access the front module head.  If I'm not mistaken, the icemaker is sidemounted on this fridge, so the whole icemaker has to come out to work on it.  It's a pain, but that's Subzero fer ya.  Then jumper T to H to initiate a harvest.  Catch the water that comes out at the end of the harvest and pour it into the icemaker mold to see how it fills.  Dump this and repeat a couple more times.  Chances are pretty good that if you've gotten this far in the diagnosis, that inadequate water volume is the problem == bad module. 

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Water pressure's good. I checked that.

Arrgh.. I'll have to empty the freezer and demount the icemaker.

 

Later...;)

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I finally got time to empty the freezer and check out this icemaker. It is a 1987 component "old-style" Whirlpool icemaker. It had cubes frozen in place. It is just no ejecting often. Friday night it dumped 8 cubes, the first in months.

I attempted to cycle the unit by gently lifting the "fingers" but nothing happened. I removed the icemaker and tested the heated- got continuity. Tested the switch attached to the wire bail and could not get continuity. With an old unit like this, should I just drop $125 and buy an all new icemaker unit?

Cap

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[user=284]caspery[/user] wrote:

It is a 1987 component "old-style" Whirlpool icemaker.

Fuggetaboutit. Buy a new icemaker.

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:D Roger-that.

Thanks for your help.

Cap

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:DSensei:

Since we last communicated I successfully replaced the icemaker in our 1988 model 550 Subzero bottom-freezer refer. The new icemaker worked flawlessly until the plumber came to fiddle under the sink. He also replaced the saddle-tee icemaker watersupply valve with an in-line valve. However, 4 days later it started to leak and I had to shut it off until I could get to it 2 weeks later. I repaired the leak , bled th eline to the icemaker and... nothing. I emptied the freezer and got in to hold the wire bale up and the over-ride switch ON and manually turned th egear on the front of the icemaker, gently, until it started to run through the cycle itself. The water filled and I replaced all the baskets etc. Next morning- nothing. I again reached in and manually started the cycle , ice cubes ejected, water filled. After work that day, nothing.

   Any ideas...?

Cap

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[user=284]caspery[/user] wrote:

The water filled and I replaced all the baskets etc.

What does that mean, you "replaced all the baskets, etc."? What baskets?

Also, what is your freezer temperature?

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The "basket" is the plastic ice bin that catches the cubes under the ice maker.  The temp. is plenty cold - just above 0

Cap

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:? Any ideas ? This is a new icemaker and a new water valve.

Cap

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[user=284]caspery[/user] wrote:

and manually turned th egear on the front of the icemaker, gently, until it started to run through the cycle itself.

Does the front of your icemaker look like Fig. 1 or Fig. 2?

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Based on the symptoms you describe, I think the plumber's work and your current icemaker troubles are unrelated; it's just coincidence that the icemaker failed when it did.

Sounds like the thermostat inside the icemaker is bad.

wpoldstyleim.jpg?dc=4675428275264869495

You can test it with your ohm meter. Make sure it's at freezer temp (~0F) before checking continuity.

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:shock: I removed the icemaker and tested the thermostat and it checked out fine. While the icemaker was out I checked out the water supply tube and saw a small amount of ice that I removed with a chopstick. Reinstalled icemaker. I started the cycle by turning the drive gear. It cycled through the fill cycle and I turned on the freezer and waited.  By morning I had 5 icecubes. Normal size but only 5??? It never cycled again. What prevents this from reccyling and filling again?

Cap

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[user=284]caspery[/user] wrote:

What prevents this from reccyling and filling again?

Given the history with recent work done on the water supply, I have to suspect that either something is clogging the screen of the water inlet valve or the inlet valve has coincidentally gone flaky (I've seen this several times on Sub-zeros).

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The water valve is new. I'll tear into it tonight and see what is what. I haven't checked the screen since the water filter was reinstalled.

Cap

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