Question about Amana Refrigerators

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Freezer not freezing

I have an Amana refrigerator model # ATB1935HR which is not cooling properly. The fan kicks on amd the compressor is running but the cold tube comming out of the compressor is only mildly cool. Things in the freezer are slowly thawing.
I would add a small detail. For a few weeks I have noticed a short buzzing noise that seems to be comming from the back of the machine. It is something clicking on, it makes a kind of 60 Hz buzz for maybe three seconds then snaps off, not loud, but noticable. I don't know if that is relavent. Could it be stuck in defrost mode? If so, What do I do? This frig is less than three years old and so far, has been flawless.

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  • jaxmaylbox Jun 21, 2009

    Hello,
    I have not heard the buzz for a while, the link you sent does not look like my refigerator. I don't know exactly how to check the starter or overload relay, but it does (or did) sound like a relay switch or overload. I don't know how to check the thermostat or the freon and all of the exposed wires look brand new. The thermostat link looked like a themostat from a car. I know it's hard to diagnose from afar but I do need some help. As far as I can tell, the buzz has gone, but the refigerator is just not getting cold, it's just getting cool.


  • jaxmaylbox Jun 21, 2009

    Nicolocarlo,
    Thanks by the way for your quick replies. I forgot to say that I did clean out the coils. I will check the things you recommended and get back I'm just not sure right now when I can. Is there any specific reason I would loose the coolant? If so, how do I replace it?

  • jaxmaylbox Jun 22, 2009

    VOTIT,
    Hey, and thanks for your suggestion. I have emptied the refigerator and taken the back out of the freezer compartment. The evapotrator fan is working just fine, the coils are free of ice and the drain tube is also clear. I did find however a component that was frozen over with about a four inch by two inch block of ice. I cannot tell what the component is but the ice is covering the in-bound and the out-bound tube for the coolant as well as what looks to be a bi-metal thermostat wire. Could this be the "termistor" you referred to? It is located near the evaporator fan and just behind the light fixture in the freezer (high and at the top right of the compartment). I'm going to thaw it out and restart the unit to see if the problem is solved. Thanks again. Jack.
    PS Could this situation have arisen if there were frozen items partially blocking the fan opening?


  • jaxmaylbox Jun 23, 2009

    m0bum,
    Thanks for the info. I have completely defrosted the refigierator and turned it back on. Everything seems to be working fine except the machine cooled down to 40 degrees F in the freezer compartment and it seems to be stuck at this temperature. Does this mean it is stuck in defrost mode? Or is it something else? Thanks


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I would recommend you stop waisting your money and give me a call 866-798-4375 Mark and i will assist you for free... whirlpoolpartssurplus.com

Posted on Jun 23, 2009

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Make sure the doors are closing properly and the gaskets are closing fully and not torn. Check to make sure the evaporator fan in the freezer is working, this fan blows the cold air around. If the fan is not working, possible bad fan motor - check for power to the fan motor and also check the fan switches around the door openings, ( if your fridge has these switches, not all do ). A common problem cropping up in the last several years has been the air damper not opening up and allowing the cold air from the freezer to be blown into the fresh food section ( mostly on SxS refrigerators ). For many years the air damper was manually operated and now we have motorized controlled or temperature controlled or thermister and electronic boards controlling air dampers, and if this device sticks closed the FF section will normally warm up. An example picture of "one" style and an air damper ( called a diffuser by Whirlpool ). Next would be to check the condenser tubing, a good place to start is to make sure the condenser coils are not built up with dust!! Make sure the condenser fan motor is also working properly. Check for any "clicking on and off" noises from the compressor, is the compressor running.

The most common fridge "not cooling" problem is a frost free failure. Remove the access panel in the freezer section to expose the evaporator coils. If the coils in the freezer section get plugged up with frost, this frost will block the evaporator fan motor from blowing the cold air around. The fan blade can also hit this frost and either become noisy or stop altogether. Locating the defrost timer can be tricky....they are often hidden behind the back bottom corners of the fridge at the bottom, in the last few years the timers have been located in the ceiling of the fresh food section, and some behind the cold control cover. Once you locate the defrost timer, slowly turn the screw like wheel in the middle of the defrost timer with a straight screwdriver until the fridge shuts off. You are now in defrost. If the defrost heater(s) comes on now, replace the defrost timer and defrost thermostat. If the heater(s) does not come on, you can ohm test the defrost heater for continuity or volt test for 120 volts to the heater(s). If you have no power to the defrost heater(s) you can also bypass the defrost thermostat to see if the defrost heater will come on, join the 2 wires together to bypass the defrost thermostat. If the heater now comes on, replace the defrost timer and defrost thermostat. If the heater itself is bad, defrost the fridge with a hair dryer, replace the defrost heater* and defrost thermostat. If the defrost timer seems "hot" to the touch or is noisy ( like a ticking or screeching noise )...replace it.

Posted on Jun 23, 2009

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Your freezer does not work properly it is often the thermostat starting the cooling process that is faulty.Try first to defrost completely, to see if this unjam the thermic sensor, if it does not work you will need to replace the thermistor.Check the evaporator fan , freezer must have a fan to avoid ice formation, if evaporator does not work, thermic sensor jams up and freezer stop working. The fan is located behind the panel in the freezer.Check the back of your freezer, If there is frost or ice, then the unit is not defrosting.This is often caused by problems with evaporator system.
Sometimes you also need to check the defrost timer, located at the top of the FFC on the Top freezer.Check also the defrost thermostat, which is on the evaporator inside the freezer.
If it isnt defrosting, change first thermostat , then check fan motor. Also check the water hole drainage for clogged up from the freezer down to motor where the water exit located.
Just click below;


It's not cool
Cooling is poor
It's noisy
The freezer compartment is icing


Hope it may helps:

Regards:
VOTIT

Posted on Jun 22, 2009

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The buzzing sound may or may not be related to the cooling power of your refrigerator. There are 2 things where the sound may originate from. One is the mechanical component, which is your compressor or the electrical components. You have to go back and listen to it carefully. For the electrical components it may probably be the starter or overload relay. Below is a link to show its location.
Relay
If they check out OK you may want to look at the wiring if there wires exposed. If the buzzing is fixed and the refrigerator still acts the same, you may want to check on the thermostat and the freon.

Posted on Jun 21, 2009

  • Nicolo Carlo Parazo Jun 21, 2009

    the refrigerator may be different but from the back all of them has almost the same components. The box that contain relays may look different and located differently.


    You can also try to clan out the coils at the back see if it will help. The defrost switch/timer/thermostat may have gone bad. In you manual it may refer to it as either of the 3. It should be the only electrical component linked to the inside aside from the light and the switch. It is usually located where you have the fans. I am having a hard time getting a picture of the unit I have from the web but the link below should be close.


    Defrost/Thermostat


    Below is a link on how to test it.


    Defrost Timer





    I hope it works. If it all checks out after cleaning the coils and the above steps, you will have to check the freon if you have the correct amount. You will have to need a special to measure this one.

  • Nicolo Carlo Parazo Jun 22, 2009

    Hello,

    I would suggest to start first with checking with the thermostat before the coolant/freon in the post before this, since this is most common with all refrigerators. Normally if there are leaks or loose linkages in your pipes, this may happen. If all check out OK have the compressor checked out if it has weakened.

    Thank you


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