My refrigerator/freezer is making a sharp buzzing noise followed by a loud click. Its been doing this every few minutes for a while, and now today, everything in my freezer appears to be defrosting.

Put off it's power supply then switch it on after somtimes

Is the compressor (underneath the refrigerator) not running?

If so, the buzzing sounds like the compressor is trying to come on, and it won't for some reason. That's major repairs.

Compressor start relay - white plastic part - sitting right on the compressor, disconnect it shake it - u'll here it if it's damaged. :)

Verify the defrost timer

You need to clean your coils under the 'fridge,' and wait 24 hours, if it is not not getting cold, perhaps replace the freon. If that does not work, you need to call a repairman.

I bet the Iemaker arm has been turned on allowing th eicemaker to cycle every 10-15 mins when the icemaker calls for water it causes the water valve to open. with no water connected to the unit the valve buzzes loudly causing your noise. make sure the icemaker arm is in the up position thus turning the i/m off thanks peyton

from your description it sounds as if the compressor is not starting up. the buzzing noise usually occurs approx. ever 3-5 minutes and is followed by a click. this indicates either a bad start relay or a stuck compressor. and from the model you listed it is most likely the compressor. if the unit is under 5 yrs old it should still be in warranty thru sears.
Thanks for using FixYa Peyton

refrigerator and freezer not getting cold

hello sbarrry2 it sound like the motor that is running continously is the condenseer fan and the buzzing and then the click would be the compressor trying to start up and going off on overlaod. shut the unit off at the swiutch, let it cool down (3) hours possibly and then try to turn it back on. this should work. Thanks for using FixYA

I had the same problem. I found the buzzing noise was caused by ice build up around the fan motor inside the freezer. I believe water must have leaked down around the fan during a defrost cycle. I removed the ice maker, the ice cube bin and ice dispenser auger motor. It sounds complicated, but it isn't too bad. The ice maker and auger are connected with quick connect plugs. So just unplug, remove the screws and remove them from the freezer. You will need to remove several other screws as well, I believe 11 in total as well as the top freezer rack. This will give you access to the white aluminum panel that runs from the top of the freezer to about halfway down the back of the freezer. After you remove the aluminum panel you will see the fan about half way down the freezer. I found a lot of ice around my fan. The fan blades were hitting the ice causing the buzz. Remove the ice and the buzzing is gone. It took me an hour to complete this repair. I hope this helps.