Question about Amana ABB1921DE Bottom Freezer Refrigerator

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My Amana refrigerator defrost timer is supposed to cycle every eight hours. Instead it takes about 14 hours to cycle around back to the defrost mode. The defrost mode does last for the proper 20 minutes. This is a brand new defrost timer which I bought to replace the old one, which was only three years old. The old one did the same thing which made me believe it was broken.

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  • Robert Moller
    Robert Moller May 15, 2010

    You actually sat and timed it for 14 hours ?

  • jarbad May 15, 2010

    I wasn't sitting in front of the fridge for 14 hours if that's what your implying. There is a small dial on the timer that I'm assuming is supposed to turn and complete a cycle every eight hours. I clicked the dial on the defrost mode and calculated when it should come on again. I came back and checked it after about eight hours and it did not cycle around. I came back and checked the timer dial a couple more times and noticed it finally reached the defrost mode after about 14 hours.

  • jarbad May 15, 2010

    I wasn't sitting in front of the fridge for 14 hours if that's what your implying. There is a small dial on the timer that I'm assuming is supposed to turn and complete a cycle every eight hours. I clicked the dial on the defrost mode and calculated when it should come on again. I came back and checked it after about eight hours and it did not cycle around. I came back and checked the timer dial a couple more times and noticed it finally reached the defrost mode after about 14 hours.

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My Amana bottom freezer keeps buliding ice and not defrosting at all I have to manually defrost about every 4 to 6 weeks.

Posted on Jul 25, 2010

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Relax, some people exagerate was all I was saying.
Anyhow, go to a good parts store and ask for a Supco EDT (Electronic Defrost Timer) replacement as they are more reliable and not much difference in price.

Posted on May 15, 2010

  • Michael Ruse Jan 25, 2014

    you mean the UT120? all these things do is time the defrost cycle? do they need to be a particular voltage or resistance or can you use them in place of any defrost timer? (except the automatic ones on a circuit board?)

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My amana fridge model number Arb1914cw isn't cooling but the freezer is working


ur defrost terminator is bad and is not going into defrost cycle? and this will stop the fan from circulating the cold air. the heat is only suppose to last up to 20-30 minutes then back into defrost mode? if the defrost timer is bad heres a trick u can use that may get u back into defrost mode, locate the defrost timer in ur fridge usually at top center. then under the timer u will see a tiny slot or hole. if u stick a small screw driver into that hole and turn slowly clockwise till u hear it click? i, it will now go into defrost and u should hear the fan and the compressor go off , hope this helps let me knoiw if u have any more questions, lastly I suspect its not ur timer but ur defrost terminator> meaning is will not allow it to go into heat defrost. its easy and relatively inexpensive.

Mar 16, 2015 | Amana Refrigerators

1 Answer

Frost build up in coils in my freezer it is supposed to be froze free


Frost free Refrigerators go into defrost cycle every 6-12 hours depending on model.
If frost become visible, on of the defrost system (Defrost timer,Defrost heater, Defrost thermostat) components has failed. The most common failure is the defrost time. If you can locate the time, try to advance it (rotating) into defrost and if you see water coming into the drain-pan within a couple of minutes, than the Heater and thermostat are OK and you need to replace the timer (relatively easy job). If no defrost occur , you better call a tech and avoid replacing unnecessary parts. Caution - Some defrost timer are incorporated into the Ice Maker mechanism are hard to test and must replace the entrie Ice Maker

Aug 18, 2014 | Amana ABB1927DE Bottom Freezer...

1 Answer

I have an Amana 25 Side by Side Refrigerator, approximately 20 + years old. The freezer side doesn't seem to maintain the cold for freezing. I have vacummed and cleaned around the coil, in...


DEFROST PROBLEM
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(disconnect the two wires plugged into it and twist them together) 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.

Jun 20, 2011 | Amana Refrigerators

1 Answer

Hey there, I have a Westpoint NOFROST De Luxe Tropical frige, model # WRK 297.1. The freezer section is forming ice and the circulation fan is making alot of noise due to ice being formed behind the back...


I believe your problem is the defroster circuit . There are only three components on most refrigerators unless you have something real special . Kidding . They are as follows : defrost timer , heating element , and defrost cut out switch . The defrost timer cycles the refrigerator out of normal operation and into defrost mode once every six to eight hours depending on the unit . When in this mode everything shuts off , compressor , circulation fan , and condenser fan is so equipped . To eliminate the circulation fan , you'll have to keep an eye on your refrigerator checking in every half hour or so for six hours to eight hours and see if it stops working . If it does , then we know the timer is working correctly and the problem will be the heating element or cutout switch . The heating element is checked with an ohm meter. Usually they burn out when they go bad and you will read infinite resistance. The defrost cutout switch should read 0-1 ohms when the freezer temperature is 40° F or lower. If the heating element checks good , in other words it shows to have resistance usually between 30 and 100 ohms, replace the cutout switch . If the circulation fan never shuts off and the unit continues to run without shutting down after a six or eight hour Time cycle , replace the defrost timer . Good luck

Feb 22, 2011 | Refrigerators

1 Answer

Ice build up in the bottom of a woods upright freezer. have romvoed ice and taken hair blower to the tube and water drains. Does not solve problem ice continues to build up


ic Defrost Thermostat
This is the component that controls how long the heater stays on when the machine is in defrost mode. Say the defrost cycle is thirty minutes, the heater may only be on for ten of those thirty minutes on the timer controls. On Adaptive Defrost Controls, when the heater shuts off, shortly after the machine exits defrost mode. Basically if the heater only stays on for ten minutes, the whole defrost cycle will only be about 12 or 13 minutes longe is continueing to build up due to one of the defrost cycle parts not fucntioning properly this is the most likely piece to be causing your ice up issue do a continuity test on the thermostat to assure that it is working properly
Basically when the heater comes on, it starts to melt the frost on the evaporator. Once all the ice and frost is gone, the temperature behind the panel will start to rise. Once the temperature behind the panel rises to a certain temperature, the thermostat will break the current of electricity going to the heater. Bam, it shuts off and prevents your freezer from becoming a sauna, or an oven. I'm sure you get the drift. The heater is on the bottom of the evaporator coils and the defrost thermostat sits on top of the evaporator coils.
Defrost Heater
This is the last component in the defrost system. This one should be pretty simple. By now if you have read this far you should already know what this does and how important is it. Some defrost heaters are a coil of wire in a glass tube under the evaporator coils. Works like a light bulb basically. The other style looks like the bake element in your stove. They both get red hot either way and melt the frost
Defrost control or timer.refrigerator-defrost-timers.jpg Some refrigerators have a defrost timer. This type works like a clock. Every eight hours or so the machine hits the defrost spot and that's when defrost occurs

Some refrigerators have an Adaptive Defrost Control. This is what makes a refrigerator energy efficient. It varys the length of time it takes the machine to go into defrost. So instead of the energy hogging heater 240545401adc-board.jpgcoming on every eight hours, it may be 24 hours, 18 hours, 10.5 hours, who knows. It depends on how many times you have opened the doors, how long the compressor has run. This is good because the refrigerator may not need to go into defrost every eight hours. Now you are saving energy.

and lastly there is the fan also if it is not working will not allow the flow of air to leave the inside of the freezer. Continuity test can also be done on the heater as well and the least likely would be the timer to go bad in some models they have a board on the back of the machine instead of a defrost timer if you have any further questions please message me back and please remember to rank how this opinion has helped as well Thanks again Rick

Jan 15, 2011 | Kenmore 16.7 cu. ft. / 473 liter Upright...

1 Answer

Build up ice on the evaporator


heres why it builds up ice Here is what's happening when you have a malfunction in the defrost system.
  • Air cannot circulate from the freezer(where the cold happens basically) to the fresh food section.
  • Your refrigerator will run constantly to try to cool the fresh food section. This will develop a new set of problems with your refrigerator. More on that later....
  • Excess frost builds up within the coils inside the freezer. This is what is blocking the air flow to the fresh food section
  • Usually you will notice the icemaker will stop making ice. Poor air flow and not quite cold enough temperatures in the freezer cause this
  • Water will not come through the dispenser on the door. Cold air settles, the water resovoir will freeze.
  • Compressor may overheat and shut off. This is when you hear, click, click, click. Not good
  • Ice Cream in the Freezer will start to get soft. That's really not that bad. lol
What can you do about this. Let me explain the defrost system in general so you get an understanding of what is going on.
The coils inside the freezer are the only part inside the whole refrigerator that "get cold". They need to stay free from excess frost build up so that air can pass through the coils and reach the refrigerator section of your refrigerator. Every eight hours or so, depending on the type of defrost timer or control you have, the compressor and fans will shut off and the machine will go into defrost mode. When the refrigerator is in defrost there is a heater that is tied into the evaporator coils inside the freezer that comes on. This heater is behind the rear panel inside the freezer where the evaporator coils are located. It melts the frost that has accumulated over the course of time. After about thirty minutes the machine comes out of defrost and goes back to normal operation.
Now the air can continue to pass through the coils and keep the freezer frozen and the refrigerator cool and everybody is happy.
What components make up the defrost system? Defrost control or timer.refrigerator-defrost-timers.jpg Some refrigerators have a defrost timer. This type works like a clock. Every eight hours or so the machine hits the defrost spot and that's when defrost occurs

Some refrigerators have an Adaptive Defrost Control. This is what makes a refrigerator energy efficient. It varys the length of time it takes the machine to go into defrost. So instead of the energy hogging heater 240545401adc-board.jpgcoming on every eight hours, it may be 24 hours, 18 hours, 10.5 hours, who knows. It depends on how many times you have opened the doors, how long the compressor has run. This is good because the refrigerator may not need to go into defrost every eight hours. Now you are saving energy.
Defrost Thermostat
This is the component that controls how long the heater stays on when the machine is in defrost mode. Say the defrost cycle is thirty minutes, the heater may only be on for ten of those thirty minutes on the timer controls. On Adaptive Defrost Controls, when the heater shuts off, shortly after the machine exits defrost mode. Basically if the heater only stays on for ten minutes, the whole defrost cycle will only be about 12 or 13 minutes long
Basically when the heater comes on, it starts to melt the frost on the evaporator. Once all the ice and frost is gone, the temperature behind the panel will start to rise. Once the temperature behind the panel rises to a certain temperature, the thermostat will break the current of electricity going to the heater. Bam, it shuts off and prevents your freezer from becoming a sauna, or an oven. I'm sure you get the drift. The heater is on the bottom of the evaporator coils and the defrost thermostat sits on top of the evaporator coils.
Defrost Heater
This is the last component in the defrost system. This one should be pretty simple. By now if you have read this far you should already know what this does and how important is it. Some defrost heaters are a coil of wire in a glass tube under the evaporator coils. Works like a light bulb basically. The other style looks like the bake element in your stove. They both get red hot either way and melt the frost.basicly what you have to do is do a continuity test on both the defrost thermostat and the heater with the power unplugged if these are both functioning properly then you would assure that the fan is blowing like its supposed to and lastly you would look at the defrost timer or the rear controlboard in some models note if you do have the timer you wont have the board if you ahve any further questions message me back and please remember to rank this chat when it is concluded Thanks again
Rick

Jan 06, 2011 | Frigidaire FRS26R4A Side by Side...

1 Answer

It seams to automaticly self defrost, draining into the trat below.


your refrigerator is supposed to defrost automatically, usually every six to eight hours depending on the type of defrost relay timer you have. Most timers are either six or eight hour. this is a normal condition.

Mar 17, 2010 | KitchenAid KSCS25FKSS Side by Side...

1 Answer

Amana fridge has been turned off to be moved and was laid on its side and now will not start


Give it 30 minutes it may have been in defrost when you moved it,it runs on a timer that has no idea it's not cold it only knows to turn it off every eight hours for 30 minutes if you are in the middle of that cycle it will come back on.

Sep 16, 2009 | Refrigerators

1 Answer

My refrigerator is 4.5 years old and the problem is that the freezer has ice build up in a matter of days, so much that it prevents air flow from the freezer below to the fridge above. I have defrosted it...


Your evaporator coils frost up in normal use and every eight hours or so the entire unit shuts down and the defrost heater comes on to melt the frost. This cycle last about 20 minutes.
If the evaporator coils behind the back panel of the freezer are icing up because of auto defrost failure
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.

Jul 01, 2009 | Amana 19 cu ft Bottom Mount Refrigerator,...

1 Answer

Stuck in defrost mode after changing timer and thermostat


Amana adaptive defrost:

Press refrigerator light switch five times in six seconds to initiate defrost cycle. Pressing five more times within six seconds will cancel defrost and go straight into the run mode. Similar operation on both bottom mount and SxS refrigerators. After the defrost terminator/thermostat opens, six minutes of dwell time occurs before the compressor and condenser fan motor will operate. After defrost terminator/thermostat open, 10 minutes of dwell time occurs before the evaporator fan motor will operate.

May 05, 2009 | Amana 25.8 cu. ft. Side-by-Side...

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