I carried a chiller for diagnosing and repair. I did not get a call with the problem. When I called or went by several days later, I was told it needed a board and somebody was going to check on part availability. In the meantime, I carried a second unit out and again no call. When I called, I was told it had a lose wire and could be picked up. In the meantime, they would continue to work on getting a part for the other unit. I didn't hear anymore until I got a call about a past due invoice. It was then that I was told they could not find the part for the second unit but my bill was >$450 for the diagnosis and repairing the wire on the unit with the lose wire.