My fridge started to have the frequent click-buzz-click noise about 2 months ago. Finally I got a chance to replace the relay and capacitor this weekend and the click-buzz-click noise went away.

However, now my fridge has another problem - I can hear loud buzzing noise (but no clicks) intermittently throughout the day. It's about 10-20 seconds each time, minutes apart between each episode, however, once it stops, the fridge stays quiet for hours and then it happens again. I am not sure what's going on.

What should I do?