My shop does the same thing. They charge a diagnostic fee that's equivalent of 1 hour's labor and give me an estimate to fix the issue. The diagnostic fee cou

My shop does the same thing. They charge a diagnostic fee that's equivalent of 1 hour's labor and give me an estimate to fix the issue. The diagnostic fee counts toward the repair. Sometimes they find other things when doing the work, but I can relate: who hasn't gotten into fixing a bug and found out it's more complicated than they thought at first?