Maureen NJ

I have a Bernina 830 and when I use the embroidery module, it keeps showing I have a problem with the bobbin. Actually, the bobbin is fine as is the embroidery work. No thread buildup. I push the button and resume stitching until the next time. It happened about 40-50 times in a 4x4 embroidery piece. It is so frustrating. I have had the Bernina 830 for almost 5 years and the first year or so, I had constant thread breakage. I must have taken it into the dealer 10 times. Finally, they changed the hook and that resolved, for the most part, the thread breakage but this problem with the bobbin has never been resolved. It happens sometimes when quilting but not often. I clean the bobbin area frequently so it is not that. Any help would be appreciated. I am taking it soon to my dealer. Cost for servicing is $175! I keep wondering if it should be sent back to Bernina for their servicing. I did not use the machine much in the past as it was so frustrating but now I am retired and sewing and quilting a lot. I would like to use the embroidery part of the machine as I have a lot invested in it to have it just sit. Please offer any suggestions. I would really appreciate it!