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I have a 27 yr old sub zero 501r i recently bought. It worked

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I have a 27 yr...
I have a 27 yr old sub zero 501r i recently bought. It worked well, then it heated up on the top shelf a bit. A technician came by and said replace the thermostat because the system didn't turn on when turned all the way up. He checked the freon and said it was okay. I replaced the thermostat. It worked for a while. Two days ago it started to heat up the top shelf again. I was gone all day yesterday. At night i put the gallon milk in the freezer. This morning it froze. I put it on the top shelf at 6 am and at 10 it was almost totally thawed. What could be my problem? Thank you.
Submitted: 2 years ago.Category: Appliance
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Answered in 16 minutes by:
7/31/2015
Appliance Technician: Appliance Medic, Home Appliance Technician replied 2 years ago
Appliance Medic
Appliance Medic, Home Appliance Technician
Category: Appliance
Satisfied Customers: 10,831
Experience: Factory Trained CFC Technician
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Hi, is the refrigerator compressor running?
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Customer reply replied 2 years ago
Yes.
Customer reply replied 2 years ago
(Posted by JustAnswer at customer's request) Hello. I would like to request the following Expert Service(s) from you: Live Phone Call. Let me know if you need more information, or send me the service offer(s) so we can proceed.
Customer reply replied 2 years ago
Sorry, this is my first time. I thought this would happen quicker. I need help now. What can i do?
Appliance Technician: Appliance Medic, Home Appliance Technician replied 2 years ago
Is the compressor and the fan next to it running?
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Customer reply replied 2 years ago
Not now.
Appliance Technician: Appliance Medic, Home Appliance Technician replied 2 years ago
The compressor and fan should be running if it's not cold. Have you double checked the wire connections on the thermostat? One may be loose. The thermostat is what tells the compressor to start and stop.
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Customer reply replied 2 years ago
The compressor and fan work sometimes and even blow down cool air. The top shelf is very warm and the others aren't.
Appliance Technician: Appliance Medic, Home Appliance Technician replied 2 years ago
Yes, the compressor should be running if the temp is not 38. You need to make sure the connections are good and the thermostat is good.
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Customer reply replied 2 years ago
Are you familiar specifically with the 501R?
Appliance Technician: Appliance Medic, Home Appliance Technician replied 2 years ago
Yes, single units. Compressor on bottom. I know them well.
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Customer reply replied 2 years ago
What would cause the top to heat up rapidly?
Appliance Technician: Appliance Medic, Home Appliance Technician replied 2 years ago
The fan not running, the light sticking on, low freon. Those are the things I would check.
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Customer reply replied 2 years ago
The top fan runs. The light turns off when i push the button. The technician checked the freon. I am going to empty the fridge and look behind the panel. Are these symptoms possible from a problem with the overload protector or compressor starting relay?
Appliance Technician: Appliance Medic, Home Appliance Technician replied 2 years ago
Is the fan by the compressor running? Is the compressor hot or cold? Is the compressor making any clicking or humming/buzzing type sounds? If so, the compressor may be locked up or the overload relay which is the start device could be bad.
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Customer reply replied 2 years ago
The compressor isn't doing anything. It is very hot. I don't know what "normal" is.
WE are emptying the fridge.
Appliance Technician: Appliance Medic, Home Appliance Technician replied 2 years ago
Is the fan next to the compressor running when the compressor runs?
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Customer reply replied 2 years ago
When it was last running this morning, the fan was running, but the compressor seemed "slow",
Customer reply replied 2 years ago
The compressor is now running normally. The fan on bottom and on top are both running.
Appliance Technician: Appliance Medic, Home Appliance Technician replied 2 years ago
Unplug it or flip the breaker. Let the compressor cool down for about 5-10 minutes. Plug it back in and see if the compressor tries to start.
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Customer reply replied 2 years ago
I opened the back. With the compressor running the coils had a little frost; what i would expect.When the door was open, the fridge tipped forward and water came out the bottom of the fridge (below the drawers). I turned off the fridge and waited 10 minutes. I turned the breaker back on and the compressor came right on.It is now blowing cool air down
Appliance Technician: Appliance Medic, Home Appliance Technician replied 2 years ago
When the compressor is running the coils should have 1/16 frost from top to bottom. Is the evaporator only partially covered in frost? The top left side? Thanks
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Customer reply replied 2 years ago
The evaporator is covered evenly in frost. The "curves" are covered the top 2/3s. The bottom 1/3 isn't.
Appliance Technician: Appliance Medic, Home Appliance Technician replied 2 years ago
Do you have a way to upload a picture of it?
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Customer reply replied 2 years ago
yes. I will take a picture and get it on this computer.
Appliance Technician: Appliance Medic, Home Appliance Technician replied 2 years ago
Thank you
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Appliance Technician: Appliance Medic, Home Appliance Technician replied 2 years ago
That actually looks decent. It should be all the way down. Once the panel was back in place and the door was shut it probably would be. So the issue has to be with the thermostat or possibly a bad start device or compressor. How long does the compressor run for before it kicks off?
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Customer reply replied 2 years ago
I think the compressor has been running since i turned it on 35-40 minutes ago. The thermostat came from sub zero but was exactly like the one i took out. About three weeks ago.
Appliance Technician: Appliance Medic, Home Appliance Technician replied 2 years ago
So it hasn't cooled properly since you replaced the thermostat?
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Customer reply replied 2 years ago
I would say it has cooled properly.. Before we replaced the thermostat the problem was the top shelf would occasionally get very warm. The tech said replace the thermostat. I did. It worked and the top shelf got warm once and was fine for a few weeks. Then Wednesday the top shelf gets warm again. If i remember right, i had the thermo on 10 and pushed the fan button and it didn't come on. (i didn't check to see if the compressor was running.) I was gone all day Thursday/yesterday and it was warm when i got home. It was warm this morning when i contacted you. What is strange is the lower shelves stay cool.
Appliance Technician: Appliance Medic, Home Appliance Technician replied 2 years ago
Yes, it sounds like an air flow issue for sure. Maybe the door is not shutting properly or a fan switch not working correctly every time. To me I would suspect the fan motor, the fan switch, door not shutting correctly. It has to be one of those. This is not an easy one I wish it was. We work on the honor system here at Just Answers. Were not credited for our work until you rate our answers positively. After you rate our answers positively the question does not close. You can come back and ask follow up questions for no additional charge. Thank you
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Customer reply replied 2 years ago
Does an air flow issue make the fridge ceiling warm?
Appliance Technician: Appliance Medic, Home Appliance Technician replied 2 years ago
Yes, it would. You either have a fan that's not coming on or the lights are coming on. Take the lights out run it for a couple days and eliminate the lights. We work on the honor system here at Just Answers. Were not credited for our work until you rate our answers positively. After you rate our answers positively the question does not close. You can come back and ask follow up questions for no additional charge. Thank you
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