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Re: do freezers have a thermostat
If the unit is a bit overcharged it will only go so low and then not cool any lower....you could try to remove a bit more charge and then see what happens... also check to see and make sure that the low press. switch is not cutting the compressor off...as the temp. drops so does the press. and if the switch setting is too high it will cutout to soon...
So... if the compressot runs continuously then drop charge...if it is cycling then sheck the switch...
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Ice cream needs to be at 10 degrees or colder to stay hard. Check your thermostat and move it colder if you need but give it 24 hours to stabilize to the new setting. Another thing you might check are the coils on the outside of your freezer. They will be on the back or underneath your freezer. What you need to look for is to see if there is any lint or dirt that might be built up on the coils. If they are real dirty they need to be cleaned off with a vacuum or an air hose if you have one. The dirt build up keeps the freezer from cooling efficiently and causes it to run warmer than normal. If all of that is clean and boosting the thermostat to a colder setting does not take care of it you might need to call a service tech. Hope this helps.
Do you know what design temperature is for that freezer? Some are meant for 0 degrees others for -10 or 15. I would say you are trying to maintain -10 for a food freezer and trying to keep ice cream frozen. Ice cream freezers need to be colder than food freezers. I know it sounds dumb but look it up. Check the door gaskets to see that there is no leakage and the surrounding area should be no higher than 75 degrees, (otherwise it\'ll run all the time). Hope this helps and good luck.
Try doing a defrost. If the freezer works after defrost, then it was the defrost system. If the freezer has auto defrost (evaporator comprising thermostat, timer, fan and heater), then the problem may restart after few days. In that case the problem is one of the parts comprised in the evaporator.
If the freezer does not cool after defrost, then temperature control (depending on model) may be responsible. Compressor and gas leak usually result in no cooling at all.
I would start there. If the thermostat has an off setting, turn it there and see if it goes off. If not, try turning it to it's warmest setting while the box is cold to see if it turns off. To test to see if the relay/ contactor is stuck/bad, kill power to the unit (Unplug or turn off breaker). Disconnect one wire to the thermostat. Restore power. If unit runs, bad relay/contactor. If unit does not run, I'd replace the thermostat. Make sure the sensing bulb of the thermostat is in the conditioned space of the box or in the return air (intake) side of the evap so it can sense the box temp.
Good day, Manufacturers of freezers do not give the option of running the machine much above that temperature. Normal operating temperature for a freezer is about -2 to about 8 above F. Otherwise people could accidentally set the temp too warm and cause a loss of food. Some appliance parts houses carry universal thermostats that could possibly cover the temperature range your looking for, but 30 degrees is far to warm to preserve frozen food safely.
The only thing that will make it cool to low is a thermostat. They wear out and get out of calibration. Check to be sure the temp sensor from the thermostat is tight on the mount. Its the little tube that connects to the evaporator that makes the thermostat work.
The freezer should stay within 5 degrees of 0 while in operation. While in defrost the freezer may reach as high as 20 to 25 degrees. If any higher temperatures are reached your food will spoil as they are defrosted and refroze everyday. If you find that the temperature is allowing your food to defrost you may want to replace your defrost thermostat. This device is located on top of the evaperator coil inside the back of the freezer. It is made to turn the heater off when a temperature of 55 degrees is reached. One other possible problem could be your defrost timer is taking to long to restart the cooling cycle after defrosting. I hope this will help you and please send any other questions you may have, I am happy to help. and dont forget to rate me.