Question about Sub-Zero 650 / O Bottom Freezer Refrigerator

6 Answers

Sub-zero 650 vacuum condenser light keeps comming on

Vacuum condenser light is on
turn unit off / unplug power... light resets
comes back on within 24 hrs

condenser is clean
condenser fan is running

freezer compressor is ok , runs very little to hold 0

frig compressor runs alot more than it used to to hold temp at 38

i've got a set of a/c gages, freon pressure at service port on compressor is 0 psi when unit is running. when unit is off pressure goes up to 35 psi

ive got some r134a freon i can add, what should pressures be ?

diag values

r - 38
re - 40


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  • Anonymous Aug 07, 2008

    My sub zero 642 "vacuum condenser" light is flashing.  I vacuum the unit regularly.  The condenser is clean but the refrigerator side was 52 on my thermometer.  What can I do?

  • fclaessens Sep 20, 2008

    We have exactly the same problems but our is a Model 690. How do we fix it?

  • edwardbloom
    edwardbloom Jan 15, 2013

    Sub Zero has a very big problem with junk evaporator coils or the fridge side. You need an evap coil most likely. SubZero= overpriced junk

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

Posted on Oct 24, 2008

  • edwardbloom
    edwardbloom Jan 15, 2013

    If the condensor is clean, and you did reset the board by turning off then on, then you have a bad evaportator coil. SubZero have junk evap coils

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Here's the answer, from an official Sub Zero repair company in NYC: Try this: either pull out the plug for the Sub Zero refrigerator or turn off the circuit breaker (or fuse) in your house that leads to it, wait for some minutes and then turn back on. It is NOT enough to turn off the unit using its own internal on-off switch - it has to be totally disconnected from the AC. I did so, waited 15 minutes, turned back on, and it worked!! I had vacuumed the condenser grill twice but the "vacuum condenser" light kept flashing AND the refrig would go bonkers if set below 38. Now the flashing warning is off and it's down to 35. Great !!!

Posted on Oct 30, 2011

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1st is the Condensrer clean?? if so has the light been reset ??? need to know how ask... the pressures will vary depending on the coil temps if you reset the light and it comes back within a day or two and the coil is clean.. It is a long run time error given from the compressor

Posted on Jan 29, 2008

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I have a 650..

Had the vacuum condenser error flashing for a few days:
1)cleaned condenser
2)unplugged unit for 20+ mins

Both did not correct the issue. Noticed that we had to replace 2 out of the 4 light bulbs at the top of the fridge. I replaced the bulbs and left the cover off for a bit. After opening the fridge about an hour later and grabbing food near the top, I noticed the bulbs were still really hot. Weird because the bulbs should have been off when fridge was closed and cooled by the cold air. Just for the hell of it I removed all of the bulbs and let the fridge go for a few hours. Wouldn't you know it, the error went away! We had a bad light switch that caused the lights to continuously stay on even when the door was closed. This raised the temps enough to keep the condenser going continuously. $20 part and problem solved!! Hope this helps somebody

Posted on May 30, 2017

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Pressure is 0 on running refrigerator compressor ? Well that means you have a leak, most likely from the evaporator coil. You can try to add Freon to fix it temporary, but in a future you'll need to replace evaporator coil. We charge 900$ for that. Good luck!

Posted on Oct 17, 2018

How do you reset vacume cond. light on the model 650?

Posted on Feb 06, 2008

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2 Answers

How do i shut off and reset sub=zero 690 fridge?
Its not necessary when "Vacuum Condenser" light is blinking means That condenser is dirty. That light will come on if compressor running too long. Most common problem is that Evaporator coil in fresh food section is leaking freon. It still might keep temps ok, but compressor need to run much more to keep temperature you set. check back wall in fresh food section on left side at the middle, behind drawers. if you see moisture in one spot or a little bit of ice build up, then You will need to call people who can replace evaporator. It is pretty expensive fix. I made video how it looks to repair this problem. Thanks.

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How do I turn off and reset side-by-side Subzero fridge, to vacuum condenser?
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My 650 sub zero keeps alerting me to vacuum condenser even after I do so. What should I do?? My condenser is at the top of the frig.
I have found the users manual for this unit, and that my give you more information. Click HERE
Hope this gives you some relief
Joe

Aug 30, 2011 | Sub-Zero 650 / O Bottom Freezer...

1 Answer

VACUUM CONDENSER MESSAGE KEEPS COMING ON subzero 650. I vaccumed it several times! The temp gauge is showing 48, yet the tem is set on 38
you need to turn off main power to frig...wait 5 mins..plug back in...if does it again replace sensor by condnser coil you cleaned..please ,on the side you cleaned flash a bright light thur it if you see no light, its plugged...then take compressed air an blow thur it...will be a little dust...vaccum up...hope it will help...michael,doctor airr appl.repair..843-384-8474...call if need more assistance..good luck...

Mar 26, 2010 | Sub-Zero 650 / O Bottom Freezer...

1 Answer

My light says "vacuum condenser". I cleaned coils and fan and turned unit back on. Light came back on in few days, also don't know where reset switch is. Thanks
Good day,
The power off/on switch is the reset proceedure on most Sub Zero's however, it initially comes on when the unit senses the temperatures are too high, leaving the compressor.
It also is a known fact that a Sub Zero condenser cannot be cleaned by vacuuming only.
Service techs use either compressed air or nitrogen with a hose to blow the condenser clean.
Lacking that, a good push -pull shop vac with a crevice tool makes a good substitute.
Remove top grille, and the cover plate for the compressors.
Aggressively blow the condenser out from both sides.
Make sure it is clean, by shining a light on the inlet side, and making sure you can see thru the fins.
It's ugly, dirty and makes a real mess,
But the option long term, is winding up replacing the compressor(s).

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3 Answers

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601R sub zero vacuum condenser notice
Your problem might be serious enough to warrant a repairman's visit. But this was my experience: An official Sub Zero repair company in NYC told me this: If the "vacumm condenser" light keeps flashing after you've opened and cleaned the condenser grill, then either pull out the plug for the Sub Zero refrigerator or turn off the circuit breaker (or fuse) in your house that leads to it, wait for some minutes and then turn back on. It is NOT enough to turn off the unit using its own internal on-off switch - it has to be totally disconnected from the AC. I did so, waited 15 minutes, turned back on, and it worked!! I had vacuumed the condenser grill twice but the "vacuum condenser" light kept flashing AND the refrig would go bonkers if set below 38. Now the flashing warning is off and it's down to 35. Great !!!

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