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Re: fridge compartment too cold.
Most bottom mount freezer units work by diverting some of the cold freezer air up to the refrigerator through a duct that vents to the top of the refrigerator A thermostat in the refrigerator closes a flap in the duct when the refrigerator is cold enough.
It seems like the thermostat or flap is not working in your refrigerator. You can troubleshoot this by turning the refrigerator to the full warm setting and turning the freezer knob in the cold direction until you hear the refrigerator turn on. Place your hand near the vent at the top of the refrigerator, if cold air comes out that means the flap is not closing like it should.
If the flap is not closing, it might be frosted open. Pop the plastic vent off (they are usually held in with snaps) and inspect the flap. It should open when the fridge knob is turned in the cold direction and close when it is turned in the warm direction. If there is no frost jamming the flap, and the flap is not moving, the thermostat is likely defective. See the pictures below, one is flap open and the other is flap closed.
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A good setting is in the middle of the thermostat range. For example, if you have numbers from 1 to 9, 5 would be a good number. If this setting continues to freeze, look for a bad thermostat or temperature thermistor.
Not on regular models. Most models have a water tank in the fridge compartment which makes the water temperature to stay just above freezing temperature.
Wanna a play with your unit. Then remove the tank and just add two pipe ends together. Eliminating the tank. Then you should get room temperature water after about 5 seconds of cold water. Be careful just connecting the two ends of pipe after removing tank might lead to freezing pipes if your fridge temperature is close to freezing temp.
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.
The settings are "relative". Someone with this fridge in Montana may need to run the same fridge with different settings than someone in Texas to get the same temperatures.
Many manufacturers recommend that the fresh food compartment should be 34 degrees F, and the freezer -10 to 0 degrees F. To set this properly, place a thermometer in the freezer (that can display temperatures as low as the desired temperature). Adjust the thermometer for the correct freezer temperature before going on to the fridge. A fully stocked freezer could take 12 hours or more for temperatures to stabilize after making changes to the thermostat. Once the -10 to 0 degree temperature has been achieved, set the fresh food compartment temperature.
Place a thermometer (that can display below freezing) in a 6 (or so) oz flexible plastic cup of water and place on a shelf in the fridge. A glass of water could break if the temperature gets below 32 degrees if the water turns to ice. The water acts as a buffer to rapidly changing temperatures when the door is opened to read the thermometer. If the fridge is "full", allow 24 hours for the temperature to stabilize before making changes.
If the fridge and freezer are empty, changes may be seen in just a few hours or less. Otherwise, wait the 12 / 24 hours for the freezer / fridge compartments.
Many times a freezer and/or refrigerator do not work right because of a dirty condenser coil...there are also many other things that can go wrong.
If you are hearing a clicking or buzzing then check out the last two tips.
If your refrigerator is running but warm, then...
Check out these tips that I wrote about that... it is a great place to start trouble shooting your unit...and something that you can do rather then calling a repair person to do a simple thing for you...
Make sure the damper at the bottom of the refrigerator compartment is close. If not, close it but not all the way. A small flow of cold air from freezer will be necessary to maintain a temperature of at least 40 degrees in the refrigerator compartment.Adjust damper as needed and use a thermometer to measure temperature over a period of time.
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.
The compressor is cycled on/off by the fresh food temperature setting. The freezer setting controls a panel, or door if you will, that allows cold air to be blown into the freezer.
Since both compartments are getting too cold, the most likely culprit is the fresh food thermostat control, since it controls the compressor cycle. Try setting it to a higher setting, even if it's above normal. Use a manual thermometer to check the temperature of the fresh food compartment and compare it to the control setting. The readings should be the same or very nearly the same.
I assume your refrigerator is controlled by a solid state controller (i.e. a printed circuit board). Some of these allow for calibration of the thermostat to coincide with the actual temperature of the fresh food compartment. That would most likely have to be done by a service technician unless you have expertise in the field.
If calibration is not an option, if you can live with the thermostat setting not reflecting the actual temperature, a free fix is to simply set it higher than you actually want it to be, recognizing that the actual temperature is 'X' degrees lower than the thermostat setting.
The freezer compartment temperature will be similarly affected, and can be controlled by the freezer temp setting, which is actually nothing more than setting the position of the panel which allows or restricts air from being blown into the fresh food compartment from the freezer. Again, the compressor is cycled on and off by the thermostat in the FRESH FOOD compartment which gets its cold air from the freezer compartment.