Question about Sub-Zero Bottom Freezer Refrigerator
550 sub zero fridge compartment stopped working but freezer works fine what are possible causes?
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Posted on Jan 02, 2017
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!
Posted on Feb 24, 2007
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
Sounds like your freezer drain is blocked up. You will require a freezer drain heater kit for this repair. It was a common problem for this unit and can be a easy fix. However it does take some patience to fish the heater down into the drain pan.
Posted on Mar 31, 2008
SOURCE: installing cams to sub zero 550
http://www.subzero.com/locator/locator.aspx?type=0&zip=Zip%20Code is the locator area parts distributors. Once you get the parts in, remove everything from the door, food, shelves.... Then with the door closed remove the upper hinge. If you have a left hinge unit you can bend the shroud out of the way and bend it back when you are done. The door can be quite heavy if you have wood panels on it so you may need help. Open the door 90 degrees and lift up and over the bottom hinge. Remove the cam from the door using a phillips head screw. Then replace the hinge cam that is on the hinge that is still attached to the body. Now you will need help, lift the door up and have some one set it into the lower hinge pin. Close the door and have some one hold it closed while you climb up and reinstall the hinge. You may have to adjust the door by sliding it forward and back left and right until you get your sight line just right.
Posted on Dec 16, 2008
The drain line has been clogged. There is actually a defrost heater kit for that problem if you can get the obstruction out. Did you call factory at 800-222-7820 or a local factory authorized servicer? The drain is accessed by removing the fan shroud and evaporator cover. There are a number of of phillips head screws that hold this in place. Once you have removed the two cover you will see the drain tube on the left side of the unit. I use a hair dryer to start defrosting the tube. If you have another freezer in the house it is easier just to turn the freeezer section off for a day or so. I use nitrogen to blow the line out from the bottom once everything has defrosted. Test for water flow, then put unit back together. Call the factory at the number above for the heater kit part number and they will also give you the local authorized parts supplier. The locator web address is http://subzero.com/locator/locator.aspx?type=0&zip=Zip%20Code
Posted on Feb 22, 2009
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