Bob receives a call from the dispatcher that a customer has a system that is not heating. The customer explained that nothing on the system was working this morning when she was getting the family started on the day. The system is a heat pump with an electric furnace.
Bob arrives and talks to the customer to see what he could learn. She says that when she got up, the house was cold and she went to the thermostat and pushed the lever up for heat and the furnace didn't start as it usually did. They go to the thermostat and Bob pushes the lever to "fan-on" and the fan doesn't start up. Bob tells the customer that he will get started on the job and find the problem.