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Fridge Above Freezer Was Not Working

10/14/2014 12:01 AM

I noticed a puddle of water under my Amana refrigerator a few weeks ago. I couldn't find a drip pan. All seemed OK, then a couple weeks ago the freezer section which is under the fridge section was full of frost. This is a frost free unit, and has been frost free for about 20 years. After a week, more frost around the door. Yesterday I discovered that the fridge section on top was nearly room temperature. I put in a thermometer made for that purpose and found it to be 60+ deg F.

The freezer part has a thermostat, but the fridge part has only a knob that seems to control the amount of air coming up from the freezer in a rectangular pipe about 1" by 4". Very little air seemed to be coming up. The schematic on the back of the unit seemed to show 2 fans. The one at the bottom that blows across the compressor was changed about 5 years ago and is still working. I didn't know the location of the other fan. I turned off the unit, unloaded the freezer section into coolers and cardboard boxes and went looking at new fridges. Yikes, $1150 for the cheapest in my size.

Coming back home in 2-3 hours, I found a small amount of water on the floor as I expected, but the air flow had not improved. There is a panel on the back of the freezer with an air outlet at the top. Plenty of cool air coming out there. I removed the panel to discover that the second fan is there, and it also blows up into the rectangular pipe. A small block of ice was on the left side, behind the panel. Nothing seemed to be blocking the rectangular pipe, so why no air flow? I found the answer when I removed the left crisper. A box 4" by 4" by 1/2" had slipped down behind the left crisper and blocked the only air return "duct".

After an hour running with the freezer air outlet taped up, the fridge was down to 50 deg. After 3 hours it was 35 deg (the middle of the "normal" range). This was with the air knob all the way cold.

Question 1: Would you consider drilling holes on the right side to make a matching air return there?

Question 2: Do you think there is still something wrong that needs to be addressed?

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#1

Re: Fridge above freezer was not working

10/14/2014 12:47 AM

1. no

2. no ...other than the air adjustment should be returned to midway or your milk might start to freeze....

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#2
In reply to #1

Re: Fridge above freezer was not working

10/14/2014 6:28 PM

Thanks for your reply. Yes I had to turn down the adjustment, otherwise, it seems fixed for now. Time will tell about the frost, but I seem to have saved $1150 for now. Now if the stock market would treat me so kind!

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#3

Re: Fridge Above Freezer Was Not Working

10/14/2014 10:42 PM

If you have a lot of frost in the freezer, it is possible that the heater on the evaporator coils is not working either due to a bad timer, open element or other similar problem that prevents the resistive heater from melting the frost off of the coils when the compressor isn't running. Hopefully you will find a paper schematic tucked away behind a grill or access panel in your fridge. That should give you some ideas of where to look.

Good luck with your quest !

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#4

Re: Fridge Above Freezer Was Not Working

10/14/2014 10:56 PM

Robin has a good point about the heating element.

Personally I have experienced a plugged drain line, that causes water to back up and freeze, increasing the ice in the machine. Now the defrost cycle is too short to melt all the ice, and the problem keeps compounding until the freezer is chock full of ice, and air flow stops.

I solved the problem by unplugging and defrosting the whole thing. I took the covers off the "cold" coils and waited until they had totally defrosted - (water everywhere, and that pinpointed the blocked drain. I use compressed air and blew out the plugged drain line (pees and corn).

It has been working fine since.

Another (the garage fridge) had the wires on the defrost timer burn off the spade connector to the defrost coil - it loaded full of ice also and stopped working.

We also have a small "beer" fridge - manual defrost - and when it is past due for a defrost and plugged full of ice - doesn't get cool very well - warm white wine.

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#5

Re: Fridge Above Freezer Was Not Working

10/15/2014 2:52 PM

The coils on the back of the machine need to be cleared of dust and debris with a shop vac to help transfer heat out of the interior as well.

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#6

Re: Fridge Above Freezer Was Not Working

10/15/2014 8:50 PM

There could be a couple of problems you should look at.

If the condenser coils under the freezer or up the back are clogged with dirt, pet hair or dust the refrigerator will not cool. Clean anyway since this is a periodic maintenance thing. You should be hearing the condenser fan running under the refrigerator if the condenser is under the refrigerator. If the condenser runs hot due to the condenser coil being dirty or fan not turning the unit will not cool. Since you are reporting frost in the freezer this most likely is not the main problem.

Do you hear the air circulating fan running inside the refrigerator section, you should hear it running since the refrigerator is not cooling.

Most likely the defrost timer that periodically defrosts the evaporator coils or a plugged drain under the evaporator. The only way to know is to remove the freezer drawer, then remove the back cover panel over the evaporator. If the evaporator is mostly clear of frost and ice than it will most likely not be your defrost circuit. There is a schematic in an envelope someplace under the freezer most likely on the side wall if you need it to debug the defrost circuit. If you are experiencing low or no air flow in the refrigerator section then the evaporator is plugged with ice and frost or the air circulating fan is not working, you should hear it running since the refrigerator is not cooling.

If you see ice under the evaporator and across the freezer floor then your defrost drain is plugged with ice. Defrost with hot (near boiling) water with a turkey baster or something similar. Do not chip ice from the coils with any sharp object like a screw driver or you will damage the coil and wreck the refrigerator. Use only hot water and do your best to contain the mess.

Hope this helps and good luck.

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