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The evaporator is completely frozen up. I suspect defrost timer is the problem but I cannot locate it.

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Frozen evaporator coil

if the evaporator coil is frozen over,then most likely the defrost terminator is bad its located on the top of the evaporator coil and is about 1" round,to test it it needs to be below 15 degrees as this is a bi-metal switch operated by temperature,it will show close to zero ohms when its cold if its good,otherwise the defrost heating element can be open its located under the evaporator coil,but its a calrod element and they usually dont go bad,you can check this with an ohmmeter also and will have anywhere from 20 to 75 ohms,if these are both ok,then the defrost timer or ADC automatic defrost timer can be bad depending on which system your unit incorporatesl

Aug 25, 2012 | Amana 22.6 cu. ft. Side-By-Side...

1 Answer

Victory fs-2d-s7 Not defrosting properly suspect defrost heaters are bad where are the heaters located and are they easy to replace.

The heater is usually attached to the evaporator. I test it by disconnecting the ends and powering it with 110 volts using a cord with alligator clips on the end, or just using an ohmmeter and testing for continuity. If it is good test the limiter for continuity while it is frozen, it will be open when it is at room temp. the last culprit is the defrost timer.

Oct 19, 2011 | Freezers

1 Answer


The problem is most likely either the defrost timer, and/or the defrost heater element(s) are faulty. The problem is that the defrost heater elements are not functioning properly and the evaporator core is actually freezing up and blocking the air flow through the evaporator core and also freezing up the thermal sensor, and when that happens there is no longer enough cold air being circulated through the refrigerator (that is actually how the unit operates and air must be able to flow through the evaporator core and then be circulated throughout the refrigerator to properly function) and as a result the refrigerator stops functioning and food can even thaw out in the freezer although the freezer seems to be iced up. (Usually at the rear wall where the evaporator core is located)

(Air flow through the evaporator core and cold air circulation and re-circulation through the refrigerator is performed by the air circulation fan and it also must be functioning)

Be sure to only use a blow dryer (with a towel on the bottom of the freezer) to thaw out the evaporator core and do not use any hard or sharp objects or the evaporator core can be damaged. The defrost timer can be located inside of the refrigerator itself, (see lower image) or it can be mounted outside usually either behind the air intake cowl or kick panel at the front base of the refrigerator, or most likely located behind the service panel on the rear of the refrigerator, and usually if the defrost timer is turning then it is most likely working, however the defrost timer can move very slowly and you can place a mark on the timer and the housing to check after about fifteen minutes to see if the position on the defrost timer has changed. The deforst timer on newer digital models can be built into the circuit board and is not a seperate timer mechanism.

Here are some images that should be similar to your situation to help assist you, and let me know if you require any further assistance.



Oct 03, 2010 | Kitchen Ranges

1 Answer

The orange light is on which has not happened before. It has never being a noisy freezer so I can't tell if something is wrong or not. It is an old one (over 12years) i can't say if is defrosting as the...

the problem is over defrost in your unit and the orange light is the indication of that. there can be two possibilities for this problem i will explain 1) the evaporator coil in the unit is got blocked by the frost of ice.the ice cubes .so the coil is not getting heated and the fan of the evaporator is stopped functioning.the evaporator coil is located in the inner side of the freezer. 2) the another problem can be defrost timer. now i will explain what is defrost timer.the defrost timer is the part which controls the cooling and defrosting in actually spins as the coldness in the unit.after the temperature reaches to certain coolness it spins back wards and defrosts.if the defrost timer is faulty it will not spin properly and all cooling and defrosting system of the unit will misaligned.if the timer gets faulty the cooling will reach till over frost and then the fan the coils in the unit will get blocked due to built-up and over current will be excreted by the unit to melt that ice.and in this melting ice procedure without defrost timer working properly the unit stops completely .it can effect any section lower or upper or may be the defrost timer t needs replacement in this case.its like a mini plastic box .the color is mostly black or white or creamish.its located at the back of the unit in the lower side beside the compressor and compressor fan.and the cost of timer is near to $40.
so the first thing i want you to try is unplug the unit from main power outlet and remove all the stuff in the unit from both refrigerator and freezer section.then letting the unit to defrost for near to 24 hours.after all the ice gets melts in 24 hours.clean all the water spilled in the unit and in the bottom of the unit. then reconnect the power cord to main outlet. and check out.because evaporator coils don't get faulty they only gets stopped from functioning due to ice buildup in between the coils.if the unit works proper that means the problem was ice build-up.but if the same problem repeats then its faulty defrost timer.
its easy to replace and fitted with some screws

you can get it from
thanks.please do rate the solution.thank you for using fixya.keep updated.

Nov 30, 2009 | Refrigerators

1 Answer

We have a side by side refrigerator, model GSS20DBMB CC. The food started warming up yesterday and the frozen foods started to thaw. I removed the freezer cover and noticed that the coil is completely...

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.

If you need help finding your model number see here>

To locate your timer, motherboard, control or adaptive defrost control , enter your model number and search for the part or post back on Fixya.

Sep 19, 2009 | Refrigerators

1 Answer

The freezer is not keeping things frozen and it is turned up to highest level

I will need your Whirlpool model number to help you better. I do believe that if you look inside the rear of the freezer you may see frost forming on the rear panel of the freezer. If you see this you will need to unplug the refrigerator and remove and defrost and examine the evaporator for ice in the pan below or if the evaporator is just frozen over because the defrost circuit is having a problem somewhere. There are 3 most likely reasons for not defrosting. #1 Defrost Timer or Adaptive Defrost is defective or #2 the defrost heater is burned out or # 3 the defrost thermostat is defective. I will show you my links and I need to get the model number in the locations most likely locations as pointed out in the photo. Please rate my solution and ask me questions as we go through with locating your refrigerators problem. Thanks, Sea Breeze


Aug 11, 2009 | Whirlpool Refrigerators

1 Answer

IMy freezer is not getting cold enough anymore

We need to check to see if your freezer is defrosting properly. I am pretty sure your refrigerator has a defrost timer located inside the fresh food compartment behind the control panel. Unplug the refrigerator and remove the rear panel inside the freezer to have a good look at the evaporator. If frozen over defrost with a hair dryer. Then let me know so we can test the defrost heater and thermostat. Your model shows a defrost timer and that is the most likely reason if you find the freezer evaporator coils frozen over. See if you can locate the timer first and turn the timer slowly clockwise until compressor stops. Wait 25 minutes and the timer should turn the compressor back on. If it does not the the timer will need replaced. Let me know what you find, Thanks, Sea Breeze

Jul 22, 2009 | Refrigerators

1 Answer

Frozen evaporator

If you can initiate the defrost cycle my manually turning the knob then your problem is with the defrost timer. $77 seems unusually high...try googling appliance parts, there are many online stores that offer discounted parts.

Jun 18, 2009 | Kenmore 57029 Side by Side Refrigerator

1 Answer

Amana side by freezer fan frozen will not run

Fan not operating could be caused by the excess frost buildup in the freezer coil. Defrost problems are related to a failure of the timer, heater, or defrost thermostat. Locate the timer and rotate the clutch head screw clockwise until you hear one audible click. That puts the system into defrost mode. If the system restarts after 18-22 minutes your problem is in the heater circuit. Heater and defrost thermostat is located behind the back wall of the freezer section.

Jun 29, 2008 | Amana ACD2232HR Side by Side Refrigerator

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