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My 16-year old refrig makes a single knocking noise when it starts to cool. It sometimes makes that noise if it's just sitting there. Just replaced the fan assembly behind the freezer wall. It wasn't blowing any cold air into the freezer or refrig.

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Just a thought..fan motors usually have some front to back play (looseness). When the fan first turns on ..it may make contact with something, however after a few blade revolutions, the air pressure will push the fan one way, and allow it to be quieter. If not the fan, the compressor will also have some starting torque possibly causing a knock.

Posted on Apr 21, 2008

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My KSRP25FNSS makes a strange knocking noise at each compressor shut down and sometimes during running. The noise is always a series of 5 knocks, very loud, in quick succession that telegraphs though


Hi,

By you discription above it sounds like one of the three spring the supports the compressor pump has failed or broke. Now the only fix is to have the compressor replaced, but if the unit is still cooling, currently its a noise problem only. I hope this helps you. If this is still under a warranty, ask for it to be checked as if in warranty it needs to be replaced. Good Luck

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My refrigerator is about 15 years old and has made a clunking noise when it shuts off since I moved into my home many years ago, but has always kept food cold/frozen. Recently, the clunk noise is getting a...


The compressor is sitting on springs inside a metal case. When it stops, the centrifical force is absorbed by these springs. If one or more springs become weak or break, the compressor hits against the outer case a time or two. (CLUNK CLUNK clunk) There is really nothing you can do about it, short of replacing the compressor. (read big bucks) NOTE: If you take a new compressor and give it a shake, you will hear the same clunk. If the noise is really bothering you, I'd say after 15 years, it's time to move that refrig to the basement and get a new energy star model for your kitchen. (the old one most likely has several more years worth of clunking before it truely dies)

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sounds like the compressor vibration dampers are wearing out. the dampers are the rubber washers that seperate the compressor from the chassis of the fridge. when they start to deteriorate, and the compressor kicks on, it will bounce against something in the chassis, causing a knocking noise.

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1 Answer

Everytime the compressor stops there is a loud 'bang' sound.


When the compressor stops, the movements of the internal components are normally absorbed by the internal spring supports. If a spring breaks, etc., the inner moving part will contact the outer case and give a knocking noise or two when it stops. You can make the compressor (even a new one) do this by giving it a shake. The compressor will most likely run for years this way with no performance problems. It is rather expensive to replace a compressor, (especially for only a noise issue) so most people just live with it or get a new refrig and use their old one as a second refrig in a basement or where ever. Please don't bother to rate this, as anything but a Fix-Ya drops my score.

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When the compressor stops, the movements of the internal components are normally absorbed by the internal spring supports. If a spring breaks, etc., the inner moving part will contact the outer case and give a knocking noise or two when it stops. You can make the compressor (even a new one) do this by giving it a shake. The compressor will most likely run for years this way with no performance problems. It is rather expensive to replace a compressor, (especially for only a noise issue) so most people just live with it or get a new refrig and use their old one as a second refrig in a basement or where ever. Please don't bother to rate this, as anything but a Fix-Ya drops my score.

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Does the sound occur when the compressor is starting or shutting down? and only lasts for a couple of seconds? I had one do the exact same thing. Sometimes it would also wake me up at night. If so, I'm afraid he is right. On the bright side, it worked fine for years. I gave it to a girlfriend when I purchased a bigger one and it is still working today. The only thing you can do is change the compressor, which is probably not $$ practical.

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