Buzzing every three minutes from freezer and it

Compressor won't start. Either a problem with start device or a stuck compressor. Expect the fridge side to get warm soon also.
For compressor replacement you definitely need a professional to do the job. The start device is not too hard to replace by yourself.

Start device part number is either 12002784 (if first two digits of fridge serial number are 10 to 27) or 12002794 (for series 28 and above, including letters). Instructions are enclosed with both parts.
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Good luck!