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mjrgonorrhea

Sub Zero 690/F Fridge is not cooling

6 posts in this topic

I would like to start by saying that I have zero experience in repairing refrigerators. I just recently found a repair video for a SubZero, which helped me at least get an idea of what to look for and that's why I'm here. I'm fairly handy and can 'DIY' almost anything with enough knowledge and proper tools, so I would like to repair this one myself.

 

Our SubZero Fridge section has not been cooling properly for years. We have tried cleaning the condenser, but it hasn't made a noticeable difference. Just today, it completely stopped cooling and made the temperature go up to over 70 degrees (control panel readout). Some other little issues: the fridge door sticks out by about a quarter of an inch, the door gasket has a cut at the bottom, and the light switch is not working properly.

 

The freezer is working fine.

 

With all this trouble, I started reading similar threads and articles and realized that I may have missed the tell tale signs of a bad evaporator. If memory serves me correctly, I had a lot of ice buildup on the back panel/evaporator cover and standing water in the fridge.

 

I took the back panel off and here is what I saw.

 

01E3BD19-8E8D-42A2-AA48-335313121A01_zps

 

D7C73B47-1D04-4E2E-A351-E272397AD166_zps

 

 

There was also a lot of hissing, coming from the little pipe (cap tube?). The evaporator is warm to the touch.

 

Now do you think the evaporator is bad? And if the refrigerant has escaped, would my compressor still be okay?

 

Also, I read that there is diagnostic mode. How do I put the system into that mode to get all the trouble codes?

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Need appliance parts? Call 877-803-7957 now!

Can't figure out how to edit my original post, so here is the service tag.

 

66E0DA05-F777-4CD6-98FA-3DE7F4D9DC93_zps

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Time for an evaporator replacement. A sealed system job is in the immediate future.

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Refrigerator section evaporator failure is fairly common to the Sub Zero product, spanning several different models.  Looks like yours has been running with a sealed system leak in that evaporator for some time.  It may be prudent to replace the refrigerator compressor as well for moisture contamination.  An expensive repair but well worth it for the 690.

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Yes that evaporator is very common to leak. The new style is a lot better as I have never had to replace one for leaking.

 

I don't know your ability but a job like that is not for a DIY'er. There is a lot of specialized equipment involved and what it would cost you to buy the equipment you could just have a pro do the job for less.

About replacing the compressor....I probably would do that too on yours just because you said it hasn't been working for years. I wouldn't have a problem leaving the original compressor in there if the problem was addressed sooner. I'd put the heat exchanger in it too while the system is opened.

 

Its going to be an expensive job but with a 690 its worth investing the money in to it.

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About the equipment. I believe I only need a set of AC gauges, a vacuum pump, and a torch. The evaporator is about $130, the filter/dryer is another $30, and I haven't looked into a compressor, but it shouldn't be much more than $100.

I've never handled a refrigerent before, but I don't imagine it to be difficult. Using a torch is basically like soldering.

I heard an evaporator job is around $600-700. If they do everything else, it will probably be a grand. So I feel like doing it myself should save me money.

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