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Frost in rear of sub-zero refrigerator above vegetable bins

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This is a very common problem. In most cases, it is due to a faulty refrigerator thermostat. I have seen balls of ice as large as a gallon of water on back walls of sub-z refrigerators due to this.

Posted on Oct 18, 2008

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Frost developing inside the refrigerator on the bottom two shelves


Lets go over the way a sealed system works. There is a highj side and a low side. The low side is the side that passes through the evaporator coils inside the machine. Most times on the freezer side only, but sub zero has independent sealed systems for each side. Once it goes throug the evaporator its then condensed into a liquid state, the high side. This is also the hot side. Well, lower pressures in the low side would logically mean lower temperatures. So for the refridgerator not to freeze more freon is used on it to keep the low side pressure higher than normal, giving the cooling effect verses freezing. So, and here is the bad part, if you are seeing ice build up in the refridgerator side you have a freon leak some where allowing the pressure to be less than required to keep it above freezing. Call a service technician and depending on how the model, sub zero warranty is parts and labor covered for the first 6, and only parts from the 6-12 year.

Apr 29, 2012 | Sub-Zero Refrigerators

2 Answers

We have a 5 year old side by side sub zero fridge/freezer (largest size)


check whether the temprature is set properly in the freezer on proper level.

Sep 27, 2008 | Sub-Zero 685/S Stainless Steel Side by...

2 Answers

Sub-zero 550 refrigerator is too cold--icing at boottom near vegetable bins. Temperature is eratic--a lot of variation between top shelf and bottom and frequently shifting and changing.


It is very common for this refrigerator to have a freon leak in the evaporator.
Since you need a EPA license, This is usually beyond the scope for the home owner to repair.
http://www.on-timeappliance.com/subzero.html

Mar 28, 2012 | Sub-Zero Refrigerators

1 Answer

What causes ice buildup behind the vegetable bin? The drain tube is open but freezes shut.


Hi,

Check out these tips...they can help you figure out what is going wrong withyour refrigerator

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Jul 07, 2011 | Sub-Zero 650 / O Bottom Freezer...

1 Answer

Frost accumulating on back of fridge - service light blinking


YOUR EVAPORATOR IN THE FRESH FOOD SECTION IS LEAKING FREON. THIS IS COMMON WITH EVAPORATORS IN THIS AREA. 12 PART WARRANY OR 6 YEAR FULL ON THIS. SUB ZERO HAS SUPERIOR CUSTOMEER SERVICE AND MAY COVER FULLY IF OUT OF THE 6TH YEAR. 1-800-222-7820 CALL THEM AND ASK.

Apr 23, 2010 | Sub-Zero 650 / O Bottom Freezer...

1 Answer

Inside the refrigerator underneath the vegetable bins we are getting ice build up. We have defrosted twice but the build up reoccurrs. Where exactly is the drain opening? and How do I clean it? How do I...


The drain opening is inside the freezer compartment (in the rear) so you need toremove the back and maybe bottom panels (inside the freezer), or you mey be able to access this hole from the back of frig if the drain tube is located outside the unit (in the rear). The best way is with pressurized air ( not a coat hanger wire). The drain heater (if so equiped) can only be accessed from the freezer by removing the panel(S). Good luck, macgivor

Dec 27, 2009 | Sub-Zero Bottom Freezer Refrigerator

1 Answer

Inside the refrigerator, the back of it ices up, the back of the top shelf and the coils behind the vegetable bins.


Make sure the vent from the freezer is set to a warmer temperature. You can also check the freezer to see if you see heavy frost. If no frost then try to adjust the vent

Aug 31, 2009 | Kenmore Elite 22.4 cu. ft. Bottom Freezer...

2 Answers

Refrig section frosting up


repairing Sub Zero under warranty Sealed System. Evaporator Change Out HD video

Jul 02, 2008 | Sub-Zero 650 / O Bottom Freezer...

3 Answers

Sub-Zero 550


You probably have a freon leak in the evaporator coil.

Nov 01, 2007 | Sub-Zero 650 / O Bottom Freezer...

1 Answer

SubZero 550 not cooling, ice film


1. check the comp. working touch the top of the comp. 2.if the motor comp. working touch the high side tube of the motor comp. if to hot the freon is ok. 3. check the cooling fan inside.

Sep 23, 2007 | Sub-Zero 650 / O Bottom Freezer...

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