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The evaporator coil keeps freezing up on a back counter duke ruf-48 refrigerator...changed out thermostat any suggestions?

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  • Expert
  • 210 Answers

Ohm out the defrost heater , if continuity, replace defrost timer or defrost control. always defrost all ice on evap. coil before returning to service.

Posted on Oct 15, 2013

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6ya6ya
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Posted on Jan 02, 2017

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catriver
  • 878 Answers

SOURCE: SubZero 550 Refrigerator Coils Freezing

donna, the model posted probably has a adaptive defrost board. You definitely have a defrost problem. I hate changing these out. They can be a challenge. It's located on the right side in back on the refer controls. You have to remove the control panel. There are 2 slots in back where you can get a finger in. Pull down on these tabs and pull out at the same time. The control panel housing will pull off. This can be a real bear to do as I always fight with them. Next you would remove the light fixture screw on the right side. A little farther back will be another screw holding the right side of the upper panel. Then there will be one on the back wall next to the filter holding the upper panel there. Now the right side of the upper panel will drop down enough to get at the adaptive defrost board. You should do a test on it by shorting between L1 and test that are marked on the board. When you do this the refer will go into defrost for approx 23 minutes. If you short between the 2 and it jumps right back out of defrost, then you can assume the board is bad. I really believe that this is your problem as I have had many of them in the past. The heater and bi-metal on the evaporator usually never fail. But to be sure, you can do the test I described above. Now some models do have a mechanical defrost timer, but on the msd2758gew it should be adaptive. You can get an idea of how this board looks by going to repairclinic.com, entering your model number and following the links to get the part you need. Catriver

Posted on Aug 25, 2008

Sea Breeze
  • 4654 Answers

SOURCE: evaporator coil freezing, replaced main control

It is possible you have a defective fan motor in the condenser area or evaporator area. Sometimes when they become defective they will run for a while and just warm up and stop while the compressor continues to run. I learned that one on four costly returns to the home. The cost was to me not the customer. Thanks, Sea Breeze

Posted on Aug 05, 2009

heatman101
  • 43501 Answers

SOURCE: 48" ge monogram refrigerator not staying cold

Hi,

Many times a freezer and/or refrigeratordo not work right because of a dirty condenser coil...there are also many otherthings that can go wrong. If you are hearing a clicking or buzzing then check out thelast two tips.

If your refrigerator is running but warm, then...

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

Refrigerator Condenser Coil Cleaning Refrigerator Repair

Refrigerator Troubleshooting Refrigerator Compressor

Refrigerator Compressor Start Capacitor and Start Relay
Refrigerator or Freezer not Cooling or Getting Cold

heatman101

sfjfg

Posted on Sep 29, 2010

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1 Answer

Evap coil freezes at top next to defrost thermostat


You will need to replace the defrost thermostat located on the coils. Here is the part to order.

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when you had the back wall off how did the evaporator coil look?was the frost pattern even all over the coil or just on the top or bottom,if it didn't have an even frost pattern covering the whole coil you have a freon leak and will have to replace the machine.it will just keep getting warmer

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Model GSS25SGMCBS coil freezes.heater checkedout ok service man changed the circuit board for $312.After 3 days, same problem again. Freeze temp ok but refrigirator sectio quit working after coil freezes....


Hello,
Control board is new, heaters ok, Check defrost thermostat and thermisters located on evaporator.
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Also check the fill tube at ice maker . Iv'e seen these get loose and fill evaporator with water causing ice block

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I have a samsung side by side refrigerator da99-00494v the tempreture keeps going up and down in the fridge it keeps freezing up at the bottomof the fridge the freezer compartment is fine working ok...


Normally one of three things. Defrost timer, defrost heaters or defrost thermostat. This allows ice buildup in the evaporator coils and prevents air flow through the fresh food area. You can go to many parts websites on Internet and see videos on how to diagnose and repair.

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Water is leaking from under the fridge


Hello,

If your chest refrigerator is showing signs of age, it may begin leaking. There are a few methods for troubleshooting faulty refrigerator but knowing some of the obvious signs of why it might leak can be very useful if you need to fix it yourself. Leaking is not limited to older models so be aware that certain maintenance procedures can help prevent leaks in newer models.

Understanding Changeable Parts Prior to Troubleshooting
There are not that many serviceable or changeable parts inside a refrigerator. A refrigerator works on a very simple basis. It contains evaporator coils, condenser coils, a compressor, a compressor overload, a relay and a thermostat. These are the basic moving parts of a refrigerator but some of them are not serviceable.

The condenser coils condense the water and the evaporator coils disperse excess water caused by the freezing process. The compressor is a heating component which compresses excess water and recycles it through the system.

Defrosting
Remove the contents of your refrigerator and place them in an alternative area to keep them frozen. Unplug and defrost your chest refrigerator before you do any troubleshooting or maintenance. Wipe and clean the inside of the refrigerator so that when you plug it back in it, will free of any grime or loose bits of debris. A clean refrigerator will also help to promote visibility when it comes to fixing leaks.

Where is the Leak?
Once you have defrosted your refrigerator, you need to establish which part of the refrigerator the leak is coming from. It could be coming from the inside of the refrigerator and this would indicate a thermostat issue. Alternatively, it could be coming from the freezing unit at the back of the refrigerator. Water always finds a way to escape so your leak could be restricted to one place but the actual cause could be elsewhere. Locate the drain tube which is normally found at the back of the refrigerator. You will probably have to unscrew or un clip the backing panel.

Check the Drain Hole
If the drain hole on your refrigerator has become blocked for any reason, you will need to clear it thoroughly to continue getting the best performance from your chest refrigerator. The drain hole is a component within the lower works of the refrigerator through which excess water runs to be recycled.

Compressor Issues
Your refrigerator contains a compressor which evaporates the excess water from the refrigerator. The refrigerator will defrost excess ice and the water flows down the drain tube to a pan where the heat of the compressor evaporates the water. If your compressor has failed, the leak will be caused by the water failing to evaporate. Have a repair contractor replace your compressor or, if this is not cost-effective, you may need to buy a new refrigerator.

Thermostat
If your refrigerator is not freezing at all and is dispersing water in several places, you may well have a thermostat failure. Check that your refrigerator is cycling correctly prior to making changes or altering the thermostat. Only if the refrigerator is not cycling are you likely to need to change the thermostat. If you have checked all the parts of your refrigerator and you still cannot locate the leak, calling in a service technician might be the best answer.


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There are four things that will cause this problem and they are the defrost thermostat, defrost heater, evaporator thermistor and the main board. This page will help http://appliance-repair-it.com/GE-refrigerator-repair.html

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MSD2656GEQ The coils on the freezer side ices up, then does not cool the refridgerator side


Hi, It's a common problem with no-frost refrigerators, you have a defrost problems, two scenarios. (1) hot air entering freezer/refrigerator, examples. hot summer days, regular openings, high room temperatures, hot foods and broken door gasket, leaving freezer/refrigerator doors slightly open overnight, could cause your evaporator (coils) to freeze/ice up. cases like this, unplug/disconnect your refrigerator, remove produce, clean and let it defrost, for an hour, make sure all ice melted. plug or reconnect your refrigerator let it work/ run empty for another hour, then put back your produce. sure it will work perfect for the next 3-4 days. (2) next type of defrost problem could be faulty defrost heater, defrost thermostat, you will have to open back panel on freezer side to check. check your defrost heaters, defrost thermostat and defrost timer, it's better to change defrost timer and defrost thermostat together, or change faulty ones independently. but before you change any parts, clean and defrost refrigerator first, could just be regular openings, hot days, etc. if after 3-4 days it started to ice up, then check following parts. defrost heater. defrost thermostat and defrost timer, let me know if icing occurs after 3-4 days then we can check those parts i suggested. remember to always disconnect/unplug your refrigerator, before attempting any repairs. good luck

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1 Answer

Evaporator coil freezing, replaced main control


It is possible you have a defective fan motor in the condenser area or evaporator area. Sometimes when they become defective they will run for a while and just warm up and stop while the compressor continues to run. I learned that one on four costly returns to the home. The cost was to me not the customer. Thanks, Sea Breeze

Aug 05, 2009 | GE GSS25SGPSS Side by Side Refrigerator

1 Answer

The coils keep freezing up.


If the evaporator coils behind the back panel of the freezer are icing up because of auto defrost failure that will stop the circulation of cold air and eventually affect the freezer too.

check defrost timer, defrost heater, defrost thermostat. In most newer models the timer has been replaced by an electronic control board. If the heater and thermostat are ok it’ll be the control.

How to check stuff>
http://www.acmehowto.com/howto/appliance/refrigerator/refrigerator.php

Jul 13, 2009 | Refrigerators

1 Answer

Frige light on not cooling,freezer fan working but not freezing


Hello there. Let me see if I can assist you.

A refrigerator or freezer that is cooling, but cooling poorly, may have a problem in one of several areas:

Evaporator coils
Condenser
Poor cooling is often the result of a heavy frost build-up on the evaporator coils or a condenser that is clogged with dust, lint, and dirt.

Evaporator coils Poor cooling is often the result of a heavy frost build-up on the evaporator coils. You can't see these coils without removing a panel on the inside of your freezer. A sure sign that there is a build-up is the presence of any frost or ice build-up on the inside walls, floor, or ceiling of the freezer. Such a frost build-up usually indicates a problem in the self-defrosting system or damaged door gaskets.

The refrigerator is supposed to self-defrost approximately four times in every 24 hour period. If one of the components in the self-defrosting system fails, the refrigerator continues to try to cool. Eventually, though, so much frost builds up on the evaporator coils that the circulating fan can't draw air over the coils. There may still be a small amount of cooling because the coils are icy, but with no air flow over the coils, cooling in the refrigerator compartment is quite limited.

Here's an inexpensive, though inconvenient, way to determine if the problem is with the self-defrosting system. Remove all of the perishable food from the refrigerator and freezer, turn the thermostat in the refrigerator to Off, and leave the doors open for 24 to 48 hours. (Be sure to have several towels ready in case the melting frost and ice causes the drip pan to overflow). This allows the refrigerator to defrost "manually." When the frost and ice build-up has completely melted away, turn the thermostat back to a normal setting. If the refrigerator then cools properly, it indicates a problem with one of three components in the self-defrosting system:

  • The defrost timer

  • The defrost thermostat (also called the bi-metal switch)

  • The defrost heater

If it still does not cool properly, there may be a problem with the refrigerant level or the compressor. You may need to consult with a qualified appliance repair technician to further diagnose the problem

Condenser Self-defrosting refrigerators all have a set of coils and a cooling fan, usually under the refrigerator, that need to be cleaned regularly. If these coils get coated with dust, dirt or lint, the refrigerator may not cool properly. The coils may appear to be a thin, black, wide radiator-like device behind the lower kick-panel. To clean them, disconnect the refrigerator from the power source, use a refrigerator condenser brush (see the Appliance Accessories section) and your vacuum cleaner to clean the coils of any lint, pet hair, etc. You may not be able to get to all of the condenser from the front, it may be necessary to clean the remainder of the condenser from the rear of the refrigerator.

May 27, 2009 | Refrigerators

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