Question about Sub-Zero Refrigerators

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Sub Zero 550 Refrigerator Compressor runs continously?

Had the unit serviced. Freon levels are good and pressure is good. Refrig box setting is at a 1 and compressor continues to run. No ice anywhere. What part needs to be replaced.

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    MARWAT May 10, 2014

    Hi Stephanie Ceglia, I want to help you with your problem, but I need more information from you. Can you please add details in the comment box? Refrigerator is working on not ? if working then then wait for 12-24 hours first time otherwise thermostate needs to set . or thermol senser

  • Stephanie Ceglia
    Stephanie Ceglia May 10, 2014

    Refrigertor is working. Ran for 24hrs, then I had tech out. He added freon to the freezer. Refrig was set to 5 and Freezer set to 4. After he added freon, he set both to 2 and the compressors turned off. Now the freezer compresser seems to be cycling. I tested the defrost timer and when it clicks the freezer compresser does cycle off. The Refrig compresser doesn't turn off even when i lower the control to 1.

    MARWAT May 10, 2014

    problem in thermostate ... some of them have 2nd regulator inside ,

  • Stephanie Ceglia
    Stephanie Ceglia May 10, 2014

    Is there a part number you can recommend or a part for me to search for? Sub Zero 550.


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  • 32 Answers

Sounds Like You Have A Clogged In The System. If the compressor is running. The system will have to be vacuumed and flushed and re charged. Is temperature of the compressor above 120?

Posted on May 10, 2014

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Posted on Jan 02, 2017

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SOURCE: sub-zero 650 vacuum condenser light keeps comming on

Turn the refrigerator off for a minute to reset the vaccum condenser light.

Posted on Oct 24, 2008

SOURCE: Sub-zero 550. freezer icing

You probably have some food on the way. Unload the freezer and see if the door would close better. Looks like you have a warm air leak.
Sub-zero refrigerator repair in orange county, ca
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Posted on Feb 06, 2010

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SOURCE: sub zero 650

It is the newly adopted power saving technique. There's nothing to worry about it.

Posted on Apr 21, 2010

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SOURCE: everything runs good but refrigerator doesnt cool?

As the weather is getting warmer for many people their freezer2_bing.gif and/or refrigerator do not work right because of a dirty condenser coil...

Check out this tip that I wrote about that... it is a great place to start trouble shooting your unit...and something that you can do rather then calling a repair person to do a simple thing for you...


Posted on Apr 27, 2010

  • 2272 Answers

SOURCE: Kitchenaide model ksrg22fkss03 does not

As you mentioned the compressor is running and even getting hot.And also rattling noise from the starter,this indicates problem with starter.But if the old starter is got burned out,then its due to faulty overload too.In this case both has to be ordered.So check the starter condition.If its got burned out or burn marks then overload too has to be ordered.Before ordering parts.If you require total parts disassembly diagram for your refrigerator then ,please click on this link.It will help you to disassemble your unit.

Thanks. keep updated for any more can rate this solution and show your appreciation.

Posted on Sep 15, 2010

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Just frost or a puddle? If it's a puddle cause by melting frost with no where to go then you had my problem. A clogged drain. First defrost the drain, a hair dryer works well, blow or snake it out then install the factory drain heater fix. Plugs right in and works like a charm. I've had my sub zero 550 for more years than I can remember. I'd buy another one in a minute. Good luck!

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Unit may be low on freon also,causing a lower pressure which would cause a lower tempreture,this occurs with a small leak or a pin hole leak.Once enough freon leaks out it will warm up and no longer work.

You can have a leak check done by a service person.

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If its as warm as you say and the refrigerant is R134A his estimate of the pressure (4# is low for 38'F) is correct.

As for the leak I can only assume he sees something to make him believe its the evaporator.

As to the warranty (if its under 1 year it should all be covered. If its 2-5th year just the compressor is covered on some manufacturers others its the sealed system meaning leaks also).

And as far as $400.00? That's not out of line from my experience (limited by 30 years of doing this) I believe from what you have said about this fellow he knows his stuff and what it costs him to do business and that he will be around to perform your next service you need also. A rare thing to see these days. Even with hard times everywhere a business still has to make a profit and cover over head. Unless your AIG, GM, or Chrysler.

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You may have a low freon condition in the fridge section. Look to see if you have an ice block building up on the rear wall towards the lower left side. If so, you are low on freon and the ost likely culprit is a leaking evaporater. The best way to tell if you are low on freon for sure is to take out all the shelves, remove the light cover, then the 2 screws holding the fan cover, and then remove the back wall. You wont be able to pull it all the way out cause the cold control is attached to it for the freezer and fridge so be careful. Turn the fridge control all the way up to 10 and wait till the compressor is running. you can tell if the compressor is running by pushing in the little switch on the top of the door frame and seeing if the fan runs(one switch is for lights, the other for fan) if it runs the compressor is on. anyway watch the coils and see if they develop frost all the way from top to bottom. If they dont you are low on freon and are ooking at about a $600 repair. if it does frost all the way you may have a bad cold control or a stalling fan motor up by the condensor on top. The best way to tell this is the next time the fridge feels warm, sheck the frame around the door seal and see if it is hot to the touch. If it is you almost surley have a bad condensor fan motor. Hope you can wade through all tis to find the answers. Good Luck!

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