When the heat bed moves forward or backward slowly there is a clicking sound. I have taken cover off to inspect if any debris was in the track area however I did not see anything other than some oil from oiling the track and bearings. If I look with a flashlight down the slit, I can see a bearing on the right side however, I am unable to see a bearing on the left side.
I just purchased this wonderful printer 2 -3 weeks ago and it’s been running everyday. Before the recall I was going to purchase the A1 but I procrastinated, so I waited until the A1 come back and purchased it and love it!