How Does a Freezer Work? — Appliance Repair Tips



although freezers vary from model to model they operate on similar principles in this video we will identify the four main factors of freezer operation as well as potential problems you may encounter freezers help preserve food by removing the heat from the inside of the appliance to accomplish this a freezer uses a sealed system that pumps refrigerant through a set of coils the system includes a compressor a pump which compresses the refrigerant in gas form into the condenser coils where the gas is condensed into a hot liquid the condenser coils dissipate the heat as the liquid travels through them once the refrigerant has passed through the condenser coils and the capillary tube it travels to the evaporator coils cooling compartment as the refrigerant liquid enters these coils it expands into a gas which makes the coils cold the gas flows through the coils to a suction line attached to the compressor the compressor converts the gas back into a liquid and the cooling cycle continues if the system is operating properly there should be a consistent frost pattern on all of the evaporator coils if only one or two rows contain frost and the rest do not it's likely that the sealed system has developed a restriction or a leak be aware that any repairs to the system must be performed by a licensed technician the temperature in the freezer should be zero degrees Fahrenheit or lower the temperature is regulated by the freezer control depending on the model the control may be a thermostat switch and sensing bulb assembly or an electronic control board that works with one or more sensors to cool the freezer the control allows voltage to travel to the start relay and compressor as well as to the condenser fan motor and evaporator fan motor if applicable once the proper temperature is reached the control shuts off the voltage to the cooling system keep in mind that it's normal for the temperature to vary throughout this cycle airflow is vital for freezers to operate efficiently to help the condenser coils to function properly some models have a condenser fan to draw in air from the front or rear of the appliance sending it through the condenser itself and then circulating the air back into the room at the same time the evaporator fan draws air through the evaporator coils which remove the heat from the air the air then recirculates back into the cooling compartment if an upright freezer will not cool properly the condenser coils may have collected too much dust dirt or hair and need to be cleaned if the coils are free of debris or are inaccessible due to being contained within the walls of the appliance the cooling problem could be caused by a failed evaporator or condenser fan motor as we mentioned earlier the evaporator coils collect Frost as the air passes through them since frost build-up can cause airflow problems most evaporator coils require periodic defrosting chess freezers need to be defrosted manually every 6 to 12 months depending on the location many upright freezers will defrost automatically the basic components in an automatic defrost system are the defrost heater the defrost thermostat and the defrost control depending on the model the control may be part of the freezer control board or it may be a defrost timer the control turns the heater on periodically throughout the day if the control thermostat or heater fail the evaporator coils will likely frost over causing poor cooling in the freezer you can test both the thermostat and heater for continuity to determine if a continuous electrical path is present if both the thermostat and heater tests positive for continuity it's likely that the control is defective and will need to be replaced repair clinic has a solution for many of the problems you may be experiencing with your freezer enter the appliances full model number in our website search engine for a complete list of compatible parts our site also has an extensive selection of instructional videos to assist you covering topics like part testing disassembly and part replacement at repair clinic we make fixing things easy

46 Comments

  • yaboy gizzleyuppy

    April 15, 2019

    What if the defrost control is also good, yet a frost free freezer still builds frost…?

    Reply
  • G2C Lover

    April 15, 2019

    I have the stand up model with the electronic control on the front. I have searched high and low, and can not find a filter. I have pulled the cover off the front, and looked in the back. I can not find dust on any sort of coil? I am 54 and remember the old days of vacuum attachments on the front of your refrigerator. I know mine has to suck air in somewhere. It just eludes me where it is.

    Reply
  • HVAC/R KNOXVILLE

    April 15, 2019

    can u tell me how to initiate defrost on electronic control board

    Reply
  • jondoego1975

    April 15, 2019

    Very good job! I had my guy from work who does the industrial rack at big stores. He was blown away. Said this was very good and I now know allot more.

    Reply
  • Jay Priday

    April 15, 2019

    My upright freezer's evaporator coils are not cooling/frosting. The copper tube that leads up to them, has frost on it. It's just not getting to the coils. The freezer had been unplugged for a year, but was working fine at the time. Just didn't need it. The compressor is working and the fan by the coils is working. The cold, just isn't making it to the coils. I'm wondering if it might be the thermistor, the temperature sensor or the control panel. I've been told each of the 3. Also, I've seen a video, where it's suggested that the system may have developed a leak. Any suggestions?

    Reply
  • Police of ROBLOX Gaming

    April 15, 2019

    There are 3 types of freezer

    Fridge/freezer

    Upright freezer

    Chest freezer

    Reply
  • Pablo Oller

    April 15, 2019

    Why is the liquid hot when it flows through the freezer, shouldn't it be cold?

    Reply
  • Josue Renteria

    April 15, 2019

    why does my suction line gets frozen?

    Reply
  • Amanda Parkinson's

    April 15, 2019

    I have a small chest freezer it has stopped working iput a new amp in it.i had it a few years now. Is the anyway I could fix it

    Reply
  • Yekutiel ben Heshel

    April 15, 2019

    Excellent! Thank you! Videos like this are doing to textbook publishers what Wikipedia did to encyclopedia publishers.

    Reply
  • Paul seth

    April 15, 2019

    quite amazing

    Reply
  • Joshua Kirk

    April 15, 2019

    Thank you for creating this video. Thanks to you I can develop a simple yet genius idea that could possibly save millions of lives if developed properly and invested in fully

    Reply
  • Rudy Rempel

    April 15, 2019

    How do to in stall new Freon Gas in to my Freezer please help [email protected] 1+519635440 Thank-you

    Reply
  • Marvin Hartog

    April 15, 2019

    kenmore frost free freezer gets cold but won't shut off.

    Reply
  • xd janbigmoma

    April 15, 2019

    I have this for homework

    Reply
  • MihalisNavara

    April 15, 2019

    Our freezer doesn't have a condenser. I removed the side cover and saw just a compressor and a fan. Nothing else. The fan and the compressor always start and stop simultaneously. Could the compressor work as a condenser too, or the condenser is located somewhere else? Nice and simple video…

    Reply
  • Ahmad Shaheen

    April 15, 2019

    hi dear I have GE upright freezer model FUF21SVARWW suddenly after electrical shut down in my home the freezer not functioning at all no compressor sound and no fan only control panel is working without effect and interior light can you help me ?>

    Reply
  • Elroy Koch

    April 15, 2019

    I have a Frigidaire chest freezer. The temp Alarm is going off continually since a power outage. I have tried unplugging the unit to reset to no avail. The lights and alarm reset on the lid not working now. What to do ?

    Reply
  • Lisa

    April 15, 2019

    I have an older Kenmore chest freezer (1988165382) that works fine but needs a new gasket, but the parts for this model are no longer available. Is there no way to determine the current model that would be the same size and use a gasket for that model?

    Reply
  • Holly Toolson

    April 15, 2019

    I have a frigidaire upright freezer that worked perfectly until we moved it to our new house. Now it doesn't even turn on. We have checked the outlet for power and it is fine.

    Reply
  • Danny Calk

    April 15, 2019

    I have a Kenmore freezer that just quit working all together, what could be the problem, does the unit have a capacitor, that could have malfunctioned?

    Reply
  • Todd White

    April 15, 2019

    This is a great overall catch all video. Good job.

    Reply
  • Alberto Medina

    April 15, 2019

    +RepairClinic.com what is the number part of the defrost control? i cant finf it. the evaporator are full on ice. i don´t have a freon leak because it was allready check.

    Reply
  • Donald Barnes

    April 15, 2019

    What creates the suction noise when I close my Whirlpool upright freezer door ?  Is there a pump that sucks out some air to help seal ?  Your video's are a great help.

    Reply
  • Alvis Jenkins

    April 15, 2019

    I have a Amana side by side refrigerator. The defrost coil with defroster failed to work and I cut some wires and the frig continues to this day (6 years) to work properly without any frosting. Explain how this can be? Freezer side is zero and frig side about 50.

    Reply
  • Dale Kessler

    April 15, 2019

    mY REFRIGERATOR   WILL NOT CRUSH THE ICE, BUT
     DISPENSES ONLY CUBES.

    Reply
  • rahmat suwitono

    April 15, 2019

    Can you make a video how split air conditioners work?

    Reply
  • 771blahblah

    April 15, 2019

    Thanks. I think there is another problem besides the gasket too…..it's cold in there, but I don't heard any motor,fan etc working. ..

    Reply
  • 771blahblah

    April 15, 2019

    My 20 yr old Whirlpool upright freezer is working ok but, there is water frozen at bottom and the door no longer has that vacuum pressure when closing or opening. In fact, the door opens too easily. I noticed a gap at lower gasket. I cleaned the gasket but didn't help. What do u think could be wrong? Thanks for any help u can provide.

    Reply
  • Danny Bottoms

    April 15, 2019

    This video was very helpful .

    Reply
  • louis tournas

    April 15, 2019

    The video shows that there is actually 1 coil. That doesn't make sense. There should be 1 for compression and one for expansion, no?

    Reply
  • Kara Metzger

    April 15, 2019

    I have an upright freezer that freezes on the bottom but not the top…the evaporator coils are full of ice…evaporator fan?

    Reply
  • 875billiondude

    April 15, 2019

    R-134 refrigerant. I think

    Reply
  • RepairClinic.com

    April 15, 2019

    If the evaporator is froze up you may have a defrost problem, or if the shelves are the evaporator and are completely covered with frost they will not be as efficient and will need to be defrosted before the freezer will work properly. Another thing that will make the unit run a lot is if you have a Freon leak and only part of the evaporator coil is getting frost. If all of the components of the freezer are working you may have a Freon leak and the unit may not be worth repairing.

    Reply
  • RepairClinic.com

    April 15, 2019

    The compressor should cycle off at some point. The normal recommended freezer temperature is around 0 degrees f. If the freezer is at or around 0 you can try and turn down the thermostat to see if it will shut off. The thermostat contacts may be stuck or it may just be out of calibration. It is possible to be cold enough to freeze the food but not cold enough to cycle off the thermostat.

    Reply
  • Hvactech

    April 15, 2019

    I have an upright freezer with the condenser coil on the top and sides of the appliance, and the compressor runs all the time, It freezes just fine but is this normal or does the compressor need to cycle off ?

    Reply
  • RepairClinic.com

    April 15, 2019

    The condenser coils are important for dissipating the heat.

    Reply
  • John Smith

    April 15, 2019

    are the condenser coils important for the freezer to work or could the freezer work with only the compressor and evaporator coils?

    Reply
  • RepairClinic.com

    April 15, 2019

    Correct. Freon is used as a coolant. There are different blends according to the application.

    Reply
  • Indra Ida Bagus

    April 15, 2019

    Yes, but how it works is same right? I've saw all your video about AC and refrigerators. And what material is it use for cooling, freon?

    Reply
  • RepairClinic.com

    April 15, 2019

    No, we have a separate video for refrigerators.

    Reply
  • Indra Ida Bagus

    April 15, 2019

    It's same with the refrigerator?

    Reply
  • hamsterats1223

    April 15, 2019

    i just notice that freezers are A/C they work the same :I

    Reply
  • RepairClinic.com

    April 15, 2019

    Thanks!

    Reply
  • OnlyRelaxingMusic

    April 15, 2019

    Educational, very nice 😉

    Reply
  • RepairClinic.com

    April 15, 2019

    Thanks for the comment!

    Reply

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