Refrigerator quit running

I located the part that was the culprit as it had buzzed very much before quitting. This is an easy removal as the part is in a two prong jack and just needs to be carefully removed with the new part inserted back in the jack provided. The refrigerator works fine now, but the run capacitor will still buzz on start up of the compressor. I do hope this is normal in this model? anyway it runs fine mow. Thank you.