Tech arrived on time and after listening to my explanation of events quickly diagnosed the problem with the AC quickly as a dirty condensate pump. He cleaned the pump and blew out the discharge. Problem fixed. However I was surprised that my 10 year guarantee did not cover the service or the pump. I also learned that my son and two of my friends had the same problem and that the seasonal service does not include a pump clean out or service or even a warning that the pump should be cleaned. Live And learn I guess.