Arrive at the customer's house. The customer approved the diagnostic and trip fee. The customer said that in April or May a technician came to tune up and that after that day she was left with the problem. I asked him why he hadn't called the office at the time, and he said he was on vacation and hadn't noticed that. I explained to him that it is already a little late to make such a claim and he has to pay the diagnostic and trip fee. The customer's problem was that a flex was disconnected and we only proceeded to rejoin the flex to the pipeline. The customer was satisfied with our work and we recommend installing a media filter and a duct cleaning. Office (Frank B) approved the customer just pay for the trip fee.