In this installment of the Btu Buddy series, Bob gets a service call from the dispatcher who says that a residence with a very sick lady is getting very hot. The homeowner needs to get his air conditioning system working again right away. It is 96 degrees F and the lady's bedroom is upstairs, where the heat has a tendency to migrate.
Bob arrives at the job and asks the owner what the “sequence of events” was. He says that the unit was cooling yesterday, but is not doing well today.