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MSD2758GEB Freezer and Fridge not cooling properly

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Hi, I have a Maytag MSD2758GEB side by side refrigerator that has stopped cooling. I tried reading through the forum

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Old 03-15-2012, 09:50 PM
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Unhappy MSD2758GEB Freezer and Fridge not cooling properly
Model Number: MSD2758GEB   Brand: Maytag   Age: 5 - 10 years   

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Hi,

I have a Maytag MSD2758GEB side by side refrigerator that has stopped cooling. I tried reading through the forum before posting, but haven't been able to narrow my problem yet. My problem is that both the Freezer and Fridge is not cooling. But upon reading this forum, I discovered that the bottom portion of the freezer and fridge is slightly cooler than the top portion. The ice and food in the top portion of the freezer have all melted, while the bottom half is still frozen. Also, the top most drawer on the fridge side is registering 10 degrees higher than the drawer right below it(56 vs 46). I have also noticed frost build up in the back bottom half on the freezer side.

I've pushed the refrigerator out and cleaned the condenser coils. I've also verified the resistance between the three pins on the compressor. If I remember correctly, they were in the range of 5-10 ohms. The condenser fan is running and the compressor is very warm, almost hot, to the touch. I can feel it vibrating softly(not sure if it's working). I can also hear another fan in the back middle area of the freezer side running(a little too loud in my opinion).

Could it be the starter piece attached to the compressor or is it something inside in the back of the freezer side? Any help would be greatly appreciated.

BTW, I've already replaced a water valve in the back, ice maker, and the housing assembly for the ice tray a couple of months back because I had water leaking all over the icemaker and freezing all over inside the top portion. I'm not sure if this is related, but you can't have too much information when it comes to this kind of things.


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  #2 (permalink)  
Old 03-16-2012, 02:37 AM
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Here are your parts
Replacement parts for Maytag MSD2758GEB REF - SXS/I&W | AppliancePartsPros.com

I doubt it is a compressor problem. It sounds like the compressor is running correctly. It runs constantly as it is trying to get the temperature down to set point.

Remove the cover inside the freezer so that you can inspect the evaporator coils.

Check that the evaporator/freezer fan is running. It is required to pull air through the evaporator coils to cool it. It also circulates the cold air in the unit.

If thecoils are heavily iced/frosted over you have a defrost problem.

If there is just frost in one area (usually where the freon enters the coils, you have a sealed system problem. This will be an expensive repair as you need a pro. Often it makes sense to put the dollars towards a new unit.
I would check the warranty, sealed systems often have a longer warranty.

Here ios a good link with some troubleshooting info.
See #20 in the Repair Aid Rooms.
http://www.applianceaid.com/frig.html
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Old 03-16-2012, 04:55 PM
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Thanks Denman for the reply. The coils ARE frosted all over. How do I check to see what part of the defrosting system is not working properly?
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Old 03-16-2012, 05:48 PM
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Hi.

To check the defrost heater and defrost thermostat run the continuity test. The thermostat must be ice cold.

The heater should show resistance and thermostat- continuity. If any of them open - replace the heater assembly.

The heater assembly Part number: AP4069923

Part number: AP4069923


If heater assembly checks out OK - then you have a bad
adaptive defrost control, located in the refrigerator top right
rear under the cover. It's marked #13 on the diagram #2.

The adaptive defrost control Part number: AP4070403

Part number: AP4070403


Here are the breakdown diagram and Replacement parts for Maytag MSD2758GEB REF - SXS/I&W | AppliancePartsPros.com

Please, post the results.

PS. Use the blow dryer to melt the frost, but it would be the best if you can just unplug the refrigerator for 24 hrs to avoid risk of melting plastic lining.
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Old 03-16-2012, 07:15 PM
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Hi Simon, thank you for the quick reply.

I ran the continuity tests. The heater element is about 22ohms, and the defrost thermostat(little round thing in the first picture above) is open. I don't know if it's ice cold though because I had just manually defrost the whole thing with a hair dryer and plugged it in about 20 minutes ago. I noticed the evaporator coils are beginning to have some frost starting near the inlet hose. Is that normal? I also noticed that the frost is starting to move through the length of the coil. I guess it's the refrigerant cooling it down right?

What's strange is that before you replied. I had measure the resistance of the defrost thermostat(while warm) and it was about 188kohms while the heater element is also about 22ohms. I also measured the fan motor resistance after defrosted it and it was about 3.0ohms. Thanks for the help.
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Old 03-17-2012, 03:56 AM
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I noticed the evaporator coils are beginning to have some frost starting near the inlet hose. Is that normal?
Yes. After a couple hours the frost should cover the evaporator coils as long as the unit does not go through a defrost cycle.

I also noticed that the frost is starting to move through the length of the coil. I guess it's the refrigerant cooling it down right?

Correct.

The parts listing includes a wiring diagram. If you look at the defrost thermostat you will see it has a zigzag in it. This denotes a resistor so your 188 kohms is probably normal when the thermostat is open.
When closed (frozen) it should read 0 ohms.

It is probably frozen by now so check it again.
Holding it onto an ice cube should also freeze it.

If it is deformed (bulged) replace it even if it does measure OK.
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Old 03-18-2012, 09:10 AM
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I measured it again today and it is still zero. The evaporator coils and fins are all covered in frost again(i think more than normal). I already ordered the new defrost heater and temperature sensor. How can i verify that my adaptive defrost control is working properly without waiting to install the new parts? Thanks for all your help.
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Old 03-19-2012, 10:53 AM
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Hello.

Below, please, find the info you've requested.
Attached Images
File Type: pdf MSA - Initiating defrost on ADC.pdf (73.1 KB, 13 views)
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Old 03-20-2012, 01:04 PM
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I got the part today and decided to test the defrost thermostat one more time and it has continuity this time. So, I think that is not my problem now, but it is the ADC. I pulled the ADC out and could not find the Test pin. I have L1, Door, Stat, L2, Comp, and HTR in that order. I guess I'll return the heating element and order the ADC. =/
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Old 03-20-2012, 01:56 PM
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Hi.

I think, you are on the right track.

Post the results.
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