Question about Refrigerators

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I have a DAEWOO FRSU20DCB fridge-freezer. It is just over two years old. Recently it started behaving erratically. Both the fridge and the freezer section don't now keep a constant low temperature. In the fridge it started by sometimes going up to 10 deg centigrade for days on end. Then it might come down a bit but still be too high. And then it might come into the right range of 2deg to 4deg for a while before again becoming too warm. Now it is constantly at 10 degrees centigrade and virtually unusable. The freezer does a similar thing and has defrosted the food by becoming too warm. I had a repair man look at it. He said that the fan that internally circulates the air in the fridge and freezer was not operating. It did not look as if there was anything wrong with the fan itself but it did not have any power going into it. He said he thought that the fan was not being actuated. He checked the sensors near it and they appeared to be OK. So finally he said the circuit board of the fridge/freezer was not working properly. This is an expensive repair for a relatively young machine. I'm not convinced the repair man knew what he was really talking about. Does this all make sense? Is there anything I can do to test/check this please?

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  • davidnunn2 Apr 07, 2011

    The advice given is based on there being temperature regulating knobs but this machine in controlled electronically by buttons on a control panel. I don't think the expert paid any attention to the nature of this model or the description given of the problem.

  • davidnunn2 Apr 09, 2011

    The solution confirmed what I thought. Daewoo shouldn't be proud of the fact tthat their circuit boards break down after a couple of years of use.

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The circuit does control the fan and the defrost cycle. During defrost the cooling system is shut down so the heater can melt the ice on the evaporator coils behind the freezer where the fan also is.
You can check the fan by putting voltage to it from an outside source if you know how but is is likely that the board is the problem. Sometimes on a bad board you can see corrosion on the soldered connections but it would take a service man to test it.

Posted on Apr 07, 2011

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Hi


It is mainly the problem with the refrigerator's temperature controls. You may need to replace it but before replacing the refrigerator's temperature controls, you should do some basic troubleshooting to make sure the problem stems from a defective control and not some other problem. The most obvious thing to check is that the refrigerator is plugged in and receiving power from the outlet. If it is running, but not cooling, it could be due to dirty condenser coils or a defective door seal. Once the coils are clean and the door seal has been checked, you can be pretty confident that the problem is the temperature controls.


There are usually two control knobs, one that controls the temperature of the freezer and one that controls the refrigerator. Although they appear to be independent controls, it is important to understand that the cold air comes solely from the freezer area into the refrigerator compartment. The freezer control determines how much cold air the condenser produces while the refrigerator control adjusts the flow of cold air from the freezer to the refrigerator compartment. If there is no cold air on either side, it is probably the freezer control that is at fault. The procedure to replace the control switch is the same for the refrigerator control and for the freezer control.

However before replacing you need to test the control mechanism before replacing it. You will need a multimeter and possibly needle-nose pliers and a screwdriver for the testing. First, unplug the refrigerator so you don't get shocked. Then, remove the temperature control's dial and/or housing. The dial will just pull straight off, but the housing may have screws holding it in place. After removing the housing, just let it hang by its wires. There should be two wires attached to the control. Label them before disconnecting so it is easier to put back together. Remove the wires by pulling on the slip-on connectors, not the wires themselves. Needle-nose pliers may be needed to remove these connectors from the terminals, especially if the refrigerator is old. Also check the thermostat - that part of your fridge that controls the temperature - may be one of the smallest parts, but of course it is also one of the most important. If you have a faulty thermostat you will almost certainly need to have it replaced.


Please get back to us if you have further query else please accept the suggestion.

Thank you for contacting fixya.com

Posted on Apr 06, 2011

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