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Freezer not freezing

Defrosted coils, replaced defrost thermostat, still doesn't work properly.
Refrigerator does not seem to be cooling very well either. Also notice
frost buildup around coils 24 hours or so after initial defrosting. Purchased unit new in 2003

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  • eburggraf May 25, 2009

    Re; Maytag MTB2156GEQ refrigerator-Freezer not freezing. I have since replaced the defrost timer, which didn't seem to help, and finally, this past weekend, I tried a continuity check on the defrost heater element. You've probably guessed; It's gone bad. Of
    course, the part is unavailable here in Milwaukee, has to be special ordered, and this is Memorial day weekend, so I'll have to wait another couple of days to see if that does the trick. Thank you!


  • Ken Bledsoe May 11, 2010

    Is the fan working inside the freezer? And also down by the compressor?

  • Bruce Volkers
    Bruce Volkers May 11, 2010

    How long since you de-iced the coils? did it freeze well for a couple of days?

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Your defrost timer or defrost heater could be bad,

Posted on May 21, 2009

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I have an MTB2156 that is not defrosting. Found this Serice Manual: http://www.servicematters.com/maytag_library/docs/16008248.pdf

Applies to:
Models MTB1542 MTB1553 MTB1742 MTB1753 MTB1943 MTB1953 MTB1954 MTB1955 MTB1956 MTB2153 MTB2154 MTB2155 MTB2156 MTB2454 MTB2456 MTB2656

Posted on Jan 24, 2010

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1 Answer

Evap coil freezes at top next to defrost thermostat


You will need to replace the defrost thermostat located on the coils. Here is the part to order.

Dec 03, 2012 | Amana DRS2663B Side by Side Refrigerator

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The cooling coil in the back of the freezer frosts up and needs to be manually defrosted nearly ever 2 weeks. The timer seems to cycle properly and the compressor cycles properly but the defrost cycle...


The ohms of the defrost heaters vary, but all you really need to do is check it for continuity. If its open, its bad. The defrost thermostat must be closed for defrost to happen,it is in series with the heater the defrost thermostat opens to terminate defrost, then the timer puts the unit back in run mode.
To check the defrost thermostat you have to put in in a freezer for a while then check for continuity . The actual open and close temps are usually stamped right on the defrost thermostat Its considered good practice to replace both the heater and the defrost thermostat while you are in there

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I have a model gss25lgmb bb. Im having issues with (couple of months) my fridge randomly stop cooling. Causing everything to defrost. My fan still seems to be on but not cooling or freezing. PLEASE HELP


If its not cooling or freezing then the compressor has to be checked.The compressor is the part which controls the cooling and freezing in the refrigerator.If the gas / refrigerant in the compressor gets low/ less then compressor will run more but it will not cool due to less refrigerant in compressor.In that case the compressor needs to be replaced. -------------- Also it can be faulty defrost assembly parts causing this issue.The thermostat is got faulty or the heater is not turning off.This also causes every thing to get defrosted.

The defrost assembly consists of three main parts. The defrost thermostat, the defrost heater and defrost board. Any of the one is not functioning. When thermostat sense the maximum cooling, it triggers the defrost heater to start heating and this defrosts the ice collected on the coils and the system works. Both thermostat and heater are controlled by defrost board. First the thermostat and defrost heater to be checked, if both check ok by meter and visually, then its defrost board causing the problem. You can get required parts from online sites like: --- www.repairclinic.com or from searspartsdirect online site.------------

Before that you can try manual defrost reset procedure. The manual defrost reset procedure is as follows : ----First unplug the unit from main power outlet. Then empty whole unit completely. Then keep both the doors open. Wait for 24 hours. All the ice collected on the coils and in the freezer section will get melted. Clean the water from the sections. Then Connect the power cord of the unit to main power outlet after 24 hours/.Then set the temperature to normal in both fridge and freezer section. It will take near to 4 hours to get run in its proper cooling cycle. Then check, if the problem returns again.Then go for replacing the parts.-------------------This should help.Thanks.Helpmech.



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1 Answer

Coils freeze up, replaced thermostat, defrost unit, mother board, only marginally works when set on 2-3


It is normal for the coils to frost evenly all over but if it's not defrosted it will build up preventing proper cooling. After replacing your defrost components make sure the frost is being melted. The motherboard determines when to defrost based you your use of the freezer/fridge. It should defrost from once a day to once every two or three days.
Is the fan in the freezer running? It won't cool right without it. It should run when the compressor runs.
Are the coils frosting evenly? Uneven frost means it is low on freon and requires a tech to repair.
Is the fan underneath the fridge near the compressor running when the compressor runs. If not It won't cool properly.
Does the compressor ever cut off as it should when it reaches the selected temp.

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1 Answer

1999 Frigidaire Refrigerator


Check rear wall of freezer by feel for frost. Heavy, even frost indicates likely problem in the defrost system. Unplug unit. Defrost heater (in freezer behind rear wall panel), defrost thermostat (same area-must be checked at freezer temperature) or Defrost timer-located lower back outside of unit. Near compressor. Do continuity test on heater and defrost thermostat and if they show continuity (good), replace defrost timer. If not, replace the one that tests bad.

Defrost coils fully. Reassemble.

Please let me know if I have helped with comments and rating.

Refrigerator will work about 7-10 days after being defrosted until thick frost builds up again cutting off air flow to both compartments

Sep 07, 2009 | Frigidaire Freezer 20.3 Cu. Ft. Frost Free...

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THIS IS A DEFROST PROBLEM EITHER THE THERMOSTAT OR DEFROST TIMER IS BAD! THE THERMOSTAT IS LOCATED BEHIND THE WALL IN THE FREEZER COMPARTMENT ATTACHED TO THE COILS TO KNOW IF ITS BAD IF WILL HAVE A RAISED SPOT ON THE BACK LIKE ITS BUSTING OPEN CHECK THAT

Apr 27, 2009 | Kenmore 55612 / 55614 / 5561 / 655619 Side...

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Coils freeze up,refridgerator and freezer stops working


The defrost cycle is not working properly, there are three things involved in system. #1 Defrost timer in refrigerator #2 Thermostat on coils to tell if unit is frozen #3 heater element located under coils thaws coils when frozen. the defrost timer if it is manual < located at the front of light assembly panel in top of refrigerator there will be a hole with a plastic piece that resembles a screw strait screw head> it turns and every 8hrs aprox. it stops operations and starts defrost cycle by allowing voltage to the thermostat and if thermostat is frozen it allows power to element for thawing coils. If defrost timer is manual look for direction it is facing and mark edge to see if timer is turning< very slow turning and is easiest way> if you can get an ohm meter ohm the element on high setting< if it has continuity element is operable> check wiring just to be sure not problem. If you find the timer does turn and doesn't stay in one position over 40 minutes then the thermostat is bad.If element fails tesing then the element is bad and if timer stays in one position then it is bad. If unit is equiped with electronic defrost timer and element is good in would replace timer and thermostat to guaranty that resolved problem

Apr 22, 2009 | Refrigerators

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Every 3 months we have to defrost the freezer


you have defrost problem when frost up turn timer if heater come on is the timer change timer and defrost thermostart also check to see if heater working

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GE refrigerator TBX25zpk coils Freezing


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Jul 21, 2008 | GE (PSS26MSRSS) Side by Side Refrigerator

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Freezing up


Check to see if there is any frost buildup in the back wall of the freezer. If so, it is not defrosting as it should.
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  2. bad defrost heater (in freezer)
  3. bad thermo switch in freezer
If you don’t know what these are then unplug the machine and let the ice melt in the freezer overnight with the door open. Then try it the next day, if is cooling fine then you need to have a service person replace one of the above items. 

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