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What is the purpose of two temperature control nobs when there is a single compressor in my samsung 280 lts fridge

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1.If this is only a fridge the one knob will be for the min and the other for the max.
max. : As soon as you switch the fridge on it will cool down the fridge to max cool down temp. example -2deg.
min. : As soon as the fridge reaches the max cool down temp and it had switch the compressor off, the fridge will start to warm up slowly, by the time it reaches the min allowed warming up temp, it will switch the compressor back on and do the cycle all over again.
2. If it is a fridge/freezer setup, the one knob will be for the fidge and the other for the freezer. If the temp in the freezer is fine a fan is activated and blows all the cool air to the fridge and controls the temp. by activating the fan.

Posted on Sep 06, 2009

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What is the ideal setting for fridge on Bosch KGN34VW20G


Hello John;

My name is Peter. I am a retired Sears service technician. The freezer temperature should be between -2 & + 2 degrees F. The fresh food section should be between 35-40 degree F.
Pick up a inexpensive temperature gauge with a steel shank. Place the temperature gauge in the freezer center. Do not make contact with any food product. Allow 20 minutes and read the gauge. Be quick the temperature on the gauge will drop quickly when you remove. Adjust the temperature control knob according until you reach the desired setting. Repeat this process as necessary. Do the same for the fresh food section.
You only have one source of cooling; the evaporator coil and fan in the freezer. The freezer will meet it's temperature setting first before it opens the fresh food section damper.
A balanced system will save on your electrical bills. The compressor will kick in only when demand is met. Your compressor should not be running continuously.

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i guess there is some problem with the thermostat

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Try defrosting the fridge. Check the cold plate at the back of the food compartment once the fridge has been defrosted and turned back on again. The cold plate in the freezer (around the walls) will be cold to touch as will the cold plate at the back of the fridge,

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1 Answer

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Many residential refrigerator / freezers are designed to work at temperature considerably above above freezing. Most modern refrigerator / freezer have a single electric thermostat - located in the fresh food compartment. This lone thermostat will control the compressor to keep the fridge (fresh food) section at the desired temperature (usually between 34 - 38 degrees F). The freezer will get colder regardless of how cold it is already whenever the fridge thermostat turns the compressor on.

Now that you see how the thermostat works, let's look at what happens when the fridge is placed in an unheated space - like a garage. In winter time, the temperature can drop considerably below 38 degrees. If the outdoor temperature remains cold enough, for long enough - it will affect the thermostat in the fridge. The temperature inside the fridge could drop below 38 degrees, preventing the thermostat from telling the compressor to turn on. Meanwhile, the temperature in the freezer compartment slowly rises from the normal -10 to 0 F degrees. It will continue to rise until it is the same temperature as the fresh food compartment or until the thermostat in the fresh food compartment tells the compressor to turn on again. This means the freezer contents will thaw.

If the temperature in the garage is even in the 40 to 50 degree range, the loss of cold in the fridge may not happen often enough to keep the compressor coming on often enough to keep some freezer items frozen solid - such as ice cream. Remember, water freezes at 32 degrees F, other products may require lower temperatures to remain frozen, and could thaw at 28 or other temperature.

Good luck!

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1 Answer

The freezer works just fine, but the fridge will not cool. I turned the unit off for about three hours. When I plugged the fridge back in, the freezer control clicked when I turned it past 3, and then...


If you have a setting that influences both chamber's temperatures, you do not have a separate temperature control for each; this would require two compressors. The common single temperature control actually sets the temp, of the freezer, and another control diverts some of the air into the refrigerator cabinet with a concealed fan.
The symptom you have is a common one and indicates that the fan that distributes cooled air has failed.
Since you didn't include the make and model of your unit, I can't give you a direct link or check for you so if you have the model number available, go to the link below and enter it there:

Sears parts dept.


Sears carries or will procure parts for many different brands of appliances and has illustrated parts breakdowns for thousands of them.

These can be a valuable guide to servicing your appliance.

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The problem is with the garage temperature. The temperature sensor for the refrigerator is in the fridge compartment, but the evap coils are in the freezer. Refrigerators were designed to work in an air conditioned space. When they are put into unheated spaces, it does not work well. The fridge thermostat typically is set to 40 deg F. If the outside temperature is close to that, then it does not turn on the compressor as much so the freezer will have a hard time staying below freezing.

There are garage refrigerator kits for people who put fridges in un heated garages in the winter. They just simple electric heaters that warm the fridge's thermostat to cause the compressor to run more often. This helps the fridge to maintain temperatures better in the freezer compartment. The same thing can be accomplished by putting a small wattage bulb in the refrigerator compartment. Just remember to remove it during the warm weather otherwise you will pay a large electricity bill in the summer months.

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turn the temperature nob all the way to full then all the way to minimum. (the red button you press to defrost the fridge probably needs to be reset...)

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1 Answer

I moved our 18 month old samsung fridge freezer Model SR281NW and one week later it has stopped working. The freezer fully defrosted and the fridge, even though it has the light on, is not cold


Is the compressor trying to run at all. Are any sounds coming from the area of the compressor? Like a hum and a click sound in that order? If the compressor is cold to the touch it could be a control problem. If the compressor is cold there are two things that shut its power off. The thermostat which controls the temperature or the defrost system. If the compressor is hot the problem is compressor related.

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