I ran into the same problem yesterday. I wish I'd seen this post sooner. They are now offering me a bill of about $ 600, which I do not intend to pay. It seems that there is the same problem with compressors(I am poorly versed in the technical component). Now I'm thinking of changing the service to aircon servicing, which has a good review from my neighbor. He was just shocked when I told him about my bill, which I received from the current service.I ran into the same problem yesterday. I wish I'd seen this post sooner.