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I have a subzero 501r (refrigerator only no freezer) i am having ice build up on the back. i had a repair man come out yesturday and he said that i needed more freeon? the low psi was 5. so i paid him 200 to add it. before he left he scrached his head and now the low psi is 17 and the high is 200? i still have ice on the back of the frig.

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  • llazzaro Oct 01, 2008

    We have the same problem. I did notice with ours, the compressor runs constantly. A rebuilt compressor was just put in 2 years ago (by previous owner). I have found 2 possible fixes but haven't yet tried either. One is a new thermostat and the other is a new condenser fan blade. Evidently, sub zero came out with a new condenser fan blade due to the problems we're describing; however, I've not yet confirmed this information. The fan blade is only about $9 and the thermostat is approx $60. I plan to try the fan blade first and will post if it fixes the problem.

  • gauden Oct 14, 2008

    i have a same problem and called a sub zero tech to check he said i need to replace the condenser and the thermostat for $1,500.00.

  • Anonymous Nov 27, 2008

    My condensor runs all the time too. We haven't pulled out the refrigerator to see if ice is on the condensors.  Does anyone know the energy use of these 501R sub zero refrigerators.  I have a huge electrical bill. 



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6 Suggested Answers

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  • 175 Answers

SOURCE: Sub-Zero 550 with Bottom Freezer

The life expectancy of these is as long as you want to fix em. I stll work on plenty of them builty before 1980. You may have to pay $900 for a bad compressor, but the fridge replacment cost is around $600, so it's up to you. take the back wall off behind the shelves an look at the coils. If the coils are frosty on only part of the coils (less than 2/3 I would say) Then you have a freon leak. likely from the evaporater (this will need to be cut out and soldered in with aq torch) If you have all frost top to bottom, defrost it, turn down the setting, and check that your door seals well and the door doesnt bounce open when you swing it shut. If there is no frost at all, feel the frame around the door opening. If its warm, take of the upper grille and then the upper sheild on the left side (2 screws). Use a flashlight to shine trough the condenser (thing on the right, looks luike a radiator) if you shine a light throuhgh towards the fan, but cannot see the light come through on the fan side, you need to vacuum off the condenser and try again. If light still does not get through, go to your local auto parts store and buy 2 cans of NON FLAMMABLE brake cleaner. Unplug the unit and hose the condenser down with the stuff untuill you can see light through it from the flashlight. this will be messy, so have a spare rol of paper towels handy. The fumes will be bad too so open a window and put a fan in if you can. If the frame of the fridge is not warm, and there is no frst, discannect the cold controll and use a piece of wire to connect the two wires together after you disconnect them from the cold control. Do not connect the green wire, and be carefull as ther will be 110volts in one of those 2 wires if you didnt unplug the fridge. let the thing run with the control bypassed for 15 minute or so and watch the coils to see if they frost. If they frost all the way, top to bottom, replace the cold control (one for the fridge on the right, by the way)Hope you can get the info you need out of this. Good Luck!

Posted on Sep 07, 2007

SOURCE: subzero 532 ice buildup in frig

Not enough refrigerant in sealed system or/and restriction in capillary tube.








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Posted on Aug 19, 2008

  • 1 Answer

SOURCE: Maytag side by side freezer ice build up

I HAVE A MSD2454GRW, 23.5 CU, MAYTAG AND ICE BUILDS UP ON THE FLOOR OF THE FREEZER TO A POINT WHERE IT RUNS ON THE FLOOR. CAN CLEAN IT OUT AND 12-15 HOURS LATER, ITS BACK.

Posted on Sep 15, 2008

  • 102 Answers

SOURCE: Subzero model #561, freezer is warm, water leak

Check to see if the freezer fan is running. Push in the two switches at the top. The light should go out and if the freezer is powered on the fan should come on. The icemaker runs on temperature so no cold means no ice. Check for ice build up around the evaporator. Could be a defrost issue or a sealed system problem. As for the water, is it the floor of the unit or the floor of the house? Is the drippan in place or sitting on the floor? Also check the condenser fan motor. If this is all greek to you, you should probably call a factory authorized servicer.

Posted on Aug 05, 2009

  • 109 Answers

SOURCE: Subzero freezer has frost/ice build up on the

Check the fan and readjust temperature control to higher. Thanks.

Posted on Oct 22, 2009

  • 15 Answers

SOURCE: Freezer works, frig does not. Also ice build up in freezer coil

I just worked on a FF801W which is supposed to be very similar. The defrost heater in mine was of the glass tube type and located under the evaporator. There was a bimetal thermostat clipped to the top of the evaporator and a thermal fuse (sealed in a clear plastic tube) nearby. The connections were behind a little plastic cover (2 screws) in the back wall just above the evaporator.

Mine was iced up like yours and I had to defrost it with a hair dryer. All the defrosting parts in the freezer compartment turned out to work so I now suspect the defrost timer (down by the compressor). I've marked it and I'm waiting to see if it's turning.

Posted on Dec 15, 2009

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