Question about Refrigerators

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Hello, I have a Amana drb1901cc bottom freezer refrigerator. Last week the refrigerator stopped being cold. The coils in the freezer were a block of ice. After melting it, we let the fridge run for a few days before we made it colder again and started putting food in again. Now the coils are starting to frost again. I have read things about the defrost timer or heater or thermostat. What is the best part to start with? Also is there a way to check the part before replacing it to see if it is faulty? Thanks for the help!

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Hi, With the information you supplied ice build up at the rear of the freezer. Your problem is going to be with your defrost system. I will also assume you have the ability to repair this yourself.
This is going to be one of three problems with your refrigerator, 1st thing to do is remove shelf’s and panel in the back of the Freezer. You may see ice build up on the evaporator, don't worry get a hair dryer and melt the ice.
Next locate the wires for the defrost heater and using a multi-meter/ohms meter test the heater for continuity (it should read infinite) if the defrost heater is bad replace it.
This is what a typical defrost heater looks like:
Hello,
I have a Amana drb1901cc - 6ddaaf7.jpg  
If the heater is good test the defrost thermostat2.gif. This should normally be done when the evaporator is still covered with ice since it will only activate at 40f - 50f depending on the . When tested with the ohms meter at below 40f it will read infinite. It is normally clipped to the upper right of the evaHello, I have a Amana drb1901cc - 4462625.jpg look something like this:
4462625.jpg The next possible problem could be the defrost timer. If you have tested the heater and thermostat and they have tested good next find the defrost timer, If your refrigerator has a mechanical one it will either be located inside the control panel in the fridge2.gif or behind the panel below the doors. Once you have located it advance the dial until you hear a click. This will initiate the defrost cycle. If your heater begins to get hot this willHello, I have a Amana drb1901cc - f218caf.jpghat your timer has stalled and needs to be replaced. A typical mechanical timer looks like this:
f218caf.jpg If your refrigerator has a digital defrost timer you should locate the tech sheet. Normally you can find this behind the panel under the doors. It will tell you how to initiate a manual defrost cycle.Hello, I have a Amana drb1901cc - 2.gifefore if the heater gets hot you will have to replace the mother board2.gif normally located behind a panel at the rear of your refrigerator.
If your fridge2.gif is warm and there is no build up of frost/ice on the back panel inside the freezer then you problem is most likely going to be the evaporator fan, have you heard the fan running in the past few hours? if you are noHello, I have a Amana drb1901cc - a4183d8.png the panel out to where you can see fan and watch it over the space of an hour to see if it turns. If you don’t see it turning replace the motor. This is what a typical evaporator fan looks like:
a4183d8.png Hope this helps. If you have any other questions please feel free to comment again. If you decide to get a repair guy in should not cost you any more then $120 - $200 depending on make/model/problem Good luck & thanks for using Fixya! Mike

Posted on Nov 13, 2009

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Hello dunc444444
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You said, Bottom freezer works fine, but upper refrigerator has no cold air

Is your freezer so full that it is packed to the top especially in the rear?
Refrigerators and freezers share the air from the compressor and travel through vents in the rear of the freezer and fridge.
Sometimes it can effect the cooling in the fridge if the freezer articles block the vents!


The water overfilling in the ice maker is an ice maker problem only.
When we install an ice maker there is a short white plastic tube that we push through the rear
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Also you need periodically to remove the front grill down in front of the fridge and gently run a refrigerator brush under the coils to clean out the dust that may block air flow over the coils.(the coils are metal black tubes that run back and forth along the bottom of your fridge.
The vacuum will not reach in to that tight space. That's why they make a special brush for this chore.
Let me know how you do?
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Bottom freezer works fine, but upper refrigerator has no cold a

Let me know.
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