I have a "Commercial Chef" portable ice maker by Haier, and it is making a horrible noise. It ran fine and then made a loud almost "garbage disposal" type of noise, I turned it off, added water to the "fill line" , to see if that would help, and turned it on again. It sounded fine for a few seconds, then the terrible noise again! I bought this second hand and do not have an owner's manual, so I appreciate any help with troubleshooting this! Thanks!