Buzzing and Clicking noise. refrigerator stopped working

My refrigerator worked great for about 4 years then last Tuesday it just started making a buzzing and then a clicking sound from the compressor area about every 15 to 20 seconds and it is not cooling at all now. Is this the compressor or is it the capacitor and starter and do you have to buy both the starter with the capacitor and the run capacitor as well.
Thanks
David

I had same problem w/my 6 year old amana. Replaced start capacitor etc
worked a week or so then reoccured. You probably need a new
compressor. this a common problem with Amana from that era, and tecumsah compressor from that era. Junk