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Maytag msd2456 Icing up in freezer, How can I check the Adaptive defrost timer if it is working properly? Thanks Martin

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Check defrost heater with ohm meter. if it is good then adaptive board is probably bad.

Posted on Jul 26, 2009

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I don't have an owners manual and want to know where I should set the freezer to avoid unnecessary ice build-up. Also is there a setting for defrost?


Click Here for your user manual=> MQU1556AEW.pdf The settings for defrost should come automatically every 12 hours. You may test the defrost timer that appears to be behind the kick plate at base and front bottom of refrigerator by removing the kick plate first and using a flathead screwdriver turn slowly clockwise until compressor stops. After a few minutes you should be able to hear a crackling noise or sizzle by opening the door and listening. Leave the timer like that for up to 35 minutes and if the freezer does not start on its own the the timer is not working properly and will need replaced. Click Here=> MQU1556AEW Unit parts number 15 in photo is defrost timer. The defrost timer is part number=> 4357124 Defrost Timer Check for air leaks around door seal as this will cause the same symptoms. If by chance the defrost timer works and the defrost does not then let me know here or here=> Appliance 911 The only other parts are the defrost heater number 16 in photo MQU1556AEW Unit Parts and part number for defrost heater is Click Here=> 8201749 If you change the defrost heater it is always good to replace the defrost thermostat number 18 in MQU1556AEW Unit Parts The defrost thermostat is part number=> 1-81801-001 The most likely problem is the defrost timer but I needed to cover every possibility. If you have questions please feel free to ask, Thanks, Sea Breeze

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Oct 10, 2010 | Maytag 15 cu. ft. / 425 liter Upright...

1 Answer

Freezer won't freeze



If the evaporator coils behind the back panel of the freezer are icing up because of auto defrost failure that will stop the circulation of cold air and eventually affect the freezer too.
The evaporator coil behind the cover on the back wall inside the freezer will ice up under normal conditions. Every 8 to 10 hours for around 20 minutes the defrost timer (or in most newer models the electronic adaptive defrost control) will turn the defrost heater on to melt the built up ice. There is a defrost thermostat which prevents the heater from overheating the freezer by breaking the heater circuit when the temp reaches close to 32 degrees F. The entire cooling system shuts off during the defrost cycle and starts back when the timer advances through the cycle.

If this ice is not melted it will continue to build up until the air can’t flow over the coil to circulate the cold air through the freezer and into the fridge. The temperature change in the fridge is usually noticed first followed by the freezer.

If the defrost thermostat is bad it can prevent the heater from coming on OR it won’t turn the heater off when it gets too warm. It is clamped to the evaporator coil at the top to sense the temp. If it appears to be misshapen it is bad.
With an ohm meter it should show continuity when cold and none when warm.
You can also bypass the thermostat to see if the heater comes on then. If it does then you know the thermostat is bad and needs replaced.

The defrost heater is located on the evaporator. It is in a tube which is at the bottom and can also go up the sides of the evaporator. On some types you can see a burnt spot if it’s bad. With an ohm meter it should show continuity from end to end when disconnected from the wiring in the freezer. You can also test the wiring for voltage when it’s in the defrost mode.

If you have a defrost timer you can test it. It can be located under the fridge behind the kick panel on the front. Some are in the fridge with the controls at the top. You can turn the defrost timer till it clicks and everything shuts down. The heater should now come on. If it does, replace the timer because that means the timer is not running. If it doesn't, check the heater and defrost thermostat. Turn the timer again till everything starts back up to end the defrost cycle.

If you have an adaptive defrost control instead of a timer, replace it if the heater and thermostat test good. It is located in the fridge with the controls in some models and on the back in others.

Nov 08, 2009 | Frigidaire Freezers

1 Answer

My admiral fridge/freezer runs a lot but does not get down to temperature


If the evaporator coils behind the back panel of the freezer are icing up because of auto defrost failure that will stop the circulation of cold air and eventually affect the freezer too.

check defrost timer, defrost heater, defrost thermostat. In most newer models the timer has been replaced by an electronic control board. If the heater and thermostat are ok it’ll be the control.

You can turn the defrost timer till it clicks and everything shuts down. The heater should now come on. If it does, replace the timer. If it doesn't, check the heater and defrost thermostat. Turn the timer again till everything starts back up to end the defrost cycle.

Sep 14, 2009 | Freezers

1 Answer

Not recovering


Make sure the fan in the freezer is running circulating the air.
How to check everything
http://www.acmehowto.com/howto/appliance/refrigerator/refrigerator.php

If the evaporator coils behind the back panel of the freezer are icing up because of auto defrost failure that will stop the circulation of cold air and eventually affect the freezer too.

check defrost timer, defrost heater, defrost thermostat. In most newer models the timer has been replaced by an electronic control board. If the heater and thermostat are ok it’ll be the control.

You can turn the defrost timer till it clicks and everything shuts down. The heater should now come on. If it does, replace the timer. If it doesn't, check the heater and defrost thermostat. Turn the timer again till everything starts back up to end the defrost cycle.

Sep 03, 2009 | Freezers

1 Answer

Food thawed, freezer running. I moved packages from in front of air ways and turned thermostat to coldest setting & it didn't change anything, freezer still at 32-33 degrees. help


If the evaporator coils behind the back panel of the freezer are icing up because of auto defrost failure that will stop the circulation of cold air
check defrost timer, defrost heater, defrost thermostat. In most newer models the timer has been replaced by an electronic control board. If the heater and thermostat are ok it’ll be the control.

You can turn the defrost timer till it clicks and everything shuts down. The heater should now come on. If it does, replace the timer. If it doesn't, check the heater and defrost thermostat. Turn the timer again till everything starts back up to end the defrost cycle.

How to check everything
http://www.acmehowto.com/howto/appliance/refrigerator/refrigerator.php

Aug 30, 2009 | Freezers

1 Answer

Hi,i would like to know how to set the traulsen intela-tarul digital thermostat and how to put it in defrost mode


How to check everything
http://www.acmehowto.com/howto/appliance/refrigerator/refrigerator.php

If the evaporator coils behind the back panel of the freezer are icing up because of auto defrost failure that will stop the circulation of cold air and eventually affect the freezer too.

check defrost timer, defrost heater, defrost thermostat.
You can turn the defrost timer till it clicks and everything shuts down. The heater should now come on. If it does, replace the timer. If it doesn't, check the heater and defrost thermostat. Turn the timer again till everything starts back up to end the defrost cycle.



Part 257 on this diagram is your defrost timer http://www.searspartsdirect.com/partsdirect/getSubComp.pd?modelNumber=TFX22JABAAA&productCategoryId=0165000&brandId=0432&modelName=REFRIGERATOR-B-SERIES&diagramPageId=00005&componentDescription=FRESH%20FOOD%20SECTION&documentId=E2134230&backToLink=Return%20to%20Sub%20Components%20list

Aug 19, 2009 | Traulsen 24.2 cu. ft. / 685 liter...

1 Answer

Freezer doesnt freeze and red light at top came on


If freezer is icing up, you might have a defrost problem. Frost free models have a heating element that is controlled by a timer to automatically defrost ice, defrost timer turns on defrost heating element every 12 hours to melt ice in freezer and allow good air flow.
You can test defrost element with an ohm meter(located inside freezer coils-will have two wires going to a plug connection), if OK replace defrost timer (located in various places depending on make and model
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Aug 17, 2009 | Freezers

1 Answer

DOES NOT MAKE ICE


If freezer is icing up, you might have a defrost problem. Frost free models have a heating element that is controlled by a timer to automatically defrost ice, defrost timer turns on defrost heating element every 12 hours to melt ice in freezer and allow good air flow.
You can test defrost element with an ohm meter(located inside freezer coils-will have two wires going to a plug connection), if OK replace defrost timer (located in various places depending on make and model

Aug 13, 2009 | Freezers

1 Answer

Defrost timer locationon maytag plus side by side


You probably have an adaptive timer . The timer is located in the far top right corner in the fresh food section ( refrig ) . A "finger hole" on both sides of the control cover are slightly pulled down then foreward to remove the cover . two 1/4" screws hold the temp indicator on ( 1 on each side ) , then 2 phillip head screws about 3" behind them are to be removed . Lastly , one 1/4" screw straight back ( usually painted white ) has to be removed , and the whole panel drops . There are 2 screws holding the adaptive timer on which you will be able to distinguish , to be removed . Installation is in reverse .

Jul 10, 2009 | Freezers

1 Answer

Maytag side by side freezer leaking water and icing in bottom


Defrost drain system is plugged and not draining out the back and into the drain collector. There is normally an air trap in this drain line under the back and behind a fiber removable panel. Check this trap and make sure it is clear of any blockage. You will then have to defrost the freezer and clear out the ice. Don't forget to replace the back fiber panel.

May 17, 2008 | Freezers

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