Dishwasher humming after start.

Our dishwasher started a loud (not crazy loud, but noticable) Humming noise a few min into the cycle and then two or three more times through out the wholl cycle. I went ahead and ran it for a ful cycle to test and evrything seems to be just fine other than this noise. Somethings i have read, have told me to look for fault indicator lights … i am not seeing those. Any help would be greatly appreciated … Thanks!!