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Noisy refrigerator evaporator fan motor

Samsung Refrigerator.
Model: RS277ACPN/XAA
Serial #: A93543CS400477 E

Symptoms: Evaporator fan in refrigerator sometimes makes excessive noise. Refrigerator still appears to be cooling OK.

What I've done: Removed fan from refrigerator. Taped refrigerator light switch in the closed position. Checked voltage at fan electrical plug. I get 12 volt reading that fluctuates between 12 and approximately 0 volts. When I plugged the fan back into the electrical plug, it ran fine, although it made a slight noise when I would move it around at different angles. I sprayed the motor shaft with silicone spray, and reinstalled the fan and motor assembly. Fan ran normally for about two weeks, and is now periodically making noise again. I'd like to make sure the fan motor is defective before replacing it

Please provide me the trouble shooting procedures for the evaporator fan motor. Questions I have: (1) What is the voltage of the fan motor? (2) What are the procedures for checking the voltage? (3) Where do I take the voltage reading? (4) Do I take the voltage reading with the fan connected? (5) Is there a test for amperage draw? (6) Is there a resistance check you can do on the motor windings? (7) Do you have to tape the refrigerator light switch closed to ensure power goes to the evaporator motor when doing voltage checks with refrigerator door open? (8) Do the refrigerator and freezer evaporator motors run independently of each other (i.e. will the freezer evaporator motor continue to run when the refrigerator door is opened?). (9) Are there other things that could cause a noisy evaporator motor (i.e. ice build up).

There is approximately ¼ inch movement (in and out) in the fan motor shaft, but it is “spring loaded” in the retracted position. Is this normal?

If available, please send me a maintenance manual/wiring diagram for this refrigerator. The wiring diagram on the rear of the refrigerator isn’t legible.

regards,

Dave

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Refrigerators , Samsung , Appliances
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4 Answers from these members:
Manage My Life
Ron, should the air flow from the freezer evaporator fan be the same as the air flow from the refrigerator evaporator fan? I'm getting noticeably stronger air flow from the freezer than I am from the refrigerator. If the air flow should be about the same, is it acceptable to swap the refrigerator motor with the freezer motor to ensure the refrigerator motor is the cause of low air flow? I confirmed both motors have the same part number. This would allow me to ensure the refrigerator evaporator motor is the culprit before dropping 50 bucks on a new motor. I believe I can rule out ice build up in the refrigerator evaporator coils as the cause of the reduced air flow (based on the information you provided previously), as the PCB would shut down the motor completely in this instance. In addition, when I had the evaporator coils exposed, and the fan removed, I noted the coils would frost up, and then the defrost element would heat up and thaw the coils. Also, the freezer is running 4 to 8 degrees cooler than the set temperature of 8 degrees (warmest setting). Is this anything to worry about? Please advise, Dave
by Manage My Life
September 8th, 2012
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Manage My Life
Thanks Ron. Update: evaporator fan has been running normally the past few days. I placed a thermometer in refrigerator though, and the coldest it gets is about 42 degrees. I have it set at the lowest setting (34 degrees). I did some checking and it seems to be a consensus that the refrigerator temp should be no higher than 40 degrees (for food safety). The refrigerator vents are not blocked, refrigerator is not over packed and there is room for air circulation, and rear coils and fan are clean. Any suggestions as to what to check next to try to get it to cool better? I'm thinking of replacing the evaporator fan motor because of the on again, off again trouble I have with it being noisy. Your thoughts?

Dave
by Manage My Life
September 7th, 2012
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Ron  Hawkins
Thanks for your question about the noise fan in your Samsung refrigerator.

Based on your description of noise it certainly sound like a worn bearing in the motor.( you serviced and was okay for two weeks) I have researched and find no reported problems with this motor. Being a DC motor and because of the way it is controlled there will be some noise during operation. (The amount of noise could only be determined by a technician familiar with your model.)I have attached images for testing the motor and a wiring diagram. I do not have a video to send, but there may some available on the web. I hope this helps determine the cause of the noise. With this model I do strongly recommend calling for a technician to come to your home.

If you get to the point where you need to have a service technician diagnose and repair this failure, you can schedule service through this link:

Sears Home Services

.

Thanks Ron H.
by Ron Hawkins Earned 2,051 community points in Appliances
September 7th, 2012
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Manage My Life
i understand how it can be frustrating when it comes to having a noisy refrigerator as well can be rather concerning. After researching the Manage My Life website and have located a link quite similar to your issue. While you are awaiting a response from an expert I have attached the link below. Hope this is helpful!
by Manage My Life
September 6th, 2012
Answered in 3 hours
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