DB2017

Hello, I also had a random noise coming from the A/C unit (after changing the cabin air filter) It is best described as a low tone rumbling sound. I pulled the A/C motor out and sure enough, a nut (from a tree) had slipped down into the fan. It was tumbling around when the fan was running. Now looking at it, it is the exact sound you would hear if a tree nut shell was tumbling around a plastic fan. Anyway, an hour later she is back together and working great. Saved my self a large amount of money so...thank you everyone.