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Frigidaire Freezer Model FFU20F9FW1 defrost problems

Frigidaire Freezer Model FFU20F9FW1 defrost problems

Recently had a total defrost of all items in freezer. Replaced defrost timer and cleaned everything plugged in and the unit ran for a little over 2 weeks no problems. Today went out to put something in the freezer and found it 40 degrees inside once again. Called local parts place and was told that a limiter - thermostat could be the problem. Any help or suggestions? Some what mechanically inclined but instructions a six year old could follow would be a help. Thank you

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  • jberd Mar 05, 2008

    Nothing is frozen. Since the unit had been acting up. I was slow at re-filling it. I only had a few meat packages in it and several non- spoilable items . They meat was frozen till yeaterday

    If You turn the timer the freezer will re- freeze. No frost showing anywhere . I can hear the fan running and the compressor running. We turned the freezer off . For fear of burning up the compressor . The unit is doing exactly what it did before we replaced the timer. So we thought defective timer or some other reason that the freezer will not come out of defrost mode. Any help would be appreciated. Thank you

  • Ron Coons
    Ron Coons May 11, 2010

    is anything frozen??? frost collecting in front of lower back wall?? hear fan turning???the deforst thermo might be an issue if there excessive ice/frost on lower panel, can be the evap fan not circulating air around cabinet as well.

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  • Freezers Master
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You say when you advance the defrost timer , id assume turn it ever so slightly the machine kicks on ad begins to freeze again?? then prior to advancing timer i would expect the unit to be totally dead(stuck in defrost mode).no fans,compressor or anything. that suonds like a bad timer or chck the wires going into the timer

Posted on Mar 05, 2008

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Your Frigidaire freezer (MFU17F3GW6) has a total capacity of 17.0 cubic foot. I do hope this information proves to be helpful. Should you need any further assistance please feel free to respond.

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http://manuals.frigidaire.com/prodinfo_pdf/StCloud/216802800en.pdf
Your unit is not self defrosting so I would suggest you do a manual defrost and see if it corrects the problem.
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Hi,
This is a common defrost problem, The ice
is not being melted by the defrost system. he fan can't blow into ref.
Take out back panel of freezer to check for icw build up. The coils should be clean.
There are three components to a defrost system- a heater,heater thermostat, and a timer unless you have a defrost electronic card.
Its best handled by a Technician but you could possibly do it by taking your model number to the nearest appliance parts store and asking for the parts. They are mostly located in freezer ,behind back panel on freezer coils.except the card which is usually located in ref The parts store will have info
Also check evaporator fan in freezer
Also check fan undernearh Ref in the rear
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I have a frigidaire freezer that decides to defrost itself once a year. We never know when it happens until it's to late.


There are usually a few things that can cause this.
1. The controller sticks or has a defective terminal, Item 30 this link: http://www.appliancepartspros.com/partsearch/model.aspx?model_id=5158184&diagram_id=893080#d893080
2. The termp control hangs intermittently Item F21 this link: http://www.appliancepartspros.com/partsearch/model.aspx?model_id=5158184&diagram_id=887262#d887262
3. The run capacitor is intermittent. Item 55 this link:
http://www.appliancepartspros.com/partsearch/model.aspx?model_id=5158184&diagram_id=893080#d893080
I do not think at this time you have a run capacitor problem as the symptom repeats over the course of a year.
Here is the problem with me troubleshooting from the computer... I can not read voltages when the unit has defrosted itself to find out whether the controller or the temp control has failed. If you really want to isolate it.. you must leave it in the stuck in the defrosted condition and read voltages to find out which of the 2 has terminated compressor power.

Just one more thing to keep in mind... this unit does not have a defrost control so if there is a brief power outtage what can be happening is.. the coolant system pressures are too high to restart the compressor. It only takes a little over 15 minutes of off timer for the system to cool and stabilize. The next time it happens.. just unplug the freezer for a bit over 15 minutes and see if it restarts right away. If it does... then you had a power outtage that lasted for under 10 minutes.
Seeing a PF code or flashing clock on any other household appliance should be your in home NOTICE to go check the freezer to see if the compressor is running.

There are things like appliance start delay timer that you can puurchase but they are quite expensive. Making the decision to have an appliance start delay timer boils down to the question: Are the contents of the freezer worth the cost of the roughtly $150.00 timer?"

Just so you know there is one more digit afther the last W in the model number; that number being anywhere from a 0 to 9.

Thanks for choosing FixYa,
Kelly

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