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jcharlie

Member Since 13 Aug 2013
Offline Last Active Aug 27 2013 03:31 PM

Posts I've Made

In Topic: sub-zero vacuum condenser light, compressor always on

27 August 2013 - 03:30 PM

Just thought I'd close out this thread with the results.  I got a new (aluminum) evaporator (the original was copper), had it installed, and the system swept, vacuumed, and recharged. Everything is working great. The compressor is finally cycling on/off after a fairly long initial cooling cycle. No more vacuum condenser light.

 

I have a couple more questions if anyone is inclined to reply--just for my own edification.

 

On this 642 the tech used between 8 to 8.5 oz of R134a. The history of the unit is unknown due to a lack of s/n, so the tech had to estimate the proper charge amount based off a standard table. How sensitive is the refrigerator to getting the optimal amount of  refrigerant? Is it really to the ounce? Does an overcharge cause the compressor to work harder, the current draw on the compressor was ~1.3A, and the tech thought he'd bleed out a little refrigerant because he wanted to see it closer to 1A.

 

Last question, is there a typical cooling/defrost cycle on the S/Z 642, or is it all based on sensors? How long should I expect each cycle to be, or can that question even be answered?

 

Thank you all for your input. It was extremelly helpful. Now how do I get a beer to you?

 

J


In Topic: sub-zero vacuum condenser light, compressor always on

18 August 2013 - 12:30 AM

S/Z part is 7006964. I don't like dye dries on ref side. Found they can clog cap tube. Know others use them though. Do use other after market driers without problems.

Thanks for the p/n, and the advice.


In Topic: sub-zero vacuum condenser light, compressor always on

16 August 2013 - 03:10 PM

That is a 4204430 evaporator. Vacuum condensor light is before s/n 1810000. After 1810000 has service light. If prior owner had warranty work done SZ should be able to find record from address.

Thanks again to all for the responses.

 

The 642 was manufactured from 1996-2008. It appears that one break in the 642 is Sept 26, 2003; units manufactured prior to this date used evaporator p/n 4204430. So, yes Woftam is correct.

 

Are all refrigerator driers the same, or do they have different part numbers depending on the model of the SZ? Is it okay to use a whirlpool dye drier that has the same capacity for contaminants? How are they rated?


In Topic: sub-zero vacuum condenser light, compressor always on

14 August 2013 - 02:28 PM

Have you had any prior service on refrigerator? Sub Zero covers 15yo system parts for my customers often. Call or Google SZ for certified service in your area.

I'm the second owner. I've owned it about 10 years w/o problem. It appears that the previous owner may have had it serviced--there is a Jasco appliance sticker, and the s/n seems to have been removed from the Sub-Zero sticker.


In Topic: sub-zero vacuum condenser light, compressor always on

14 August 2013 - 11:22 AM

Some of the postings I've read say that the frosting near the inlet can be a sign of low charge. Does this beg the question: "the charge is low, because there is a leak"?

 

  1. Is it ever normal for the sealed system to lose charge over time w/o there being a leak?
  2. Does the frosting pattern conclusively indicate a leak near the frost area? It was not readily apparent that the evaporator was pitted, leaking, or damaged. The frosted area, defrosted in about 10 minutes.
  3. Upon seeing the frost pattern would you immediately go to replace the evaporator (and dryer?) as a first step?

 

Thanks for any responses.



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