Service Call
A residential customer calls. There is no heat. The furnace is in the basement, and there is a sound like a clock ticking.
Making sure not to block the driveway, the service technician puts on protective shoe coverings, rings the doorbell, and then steps back to a
comfortable distance from the door. When the customer comes to the door, the technician politely introduces himself while handing out his business
card. Once invited in, the technician politely listens to the customer and asks where the furnace is located. The service technician then goes to the
basement, locates the furnace, and removes the furnace door. The technician hears the arcing sound. On removing the shield in front of the burner, the
technician sees the arc. He lights a match on an extender and places it near the pilot to see whether there is gas at the pilot and whether it will light. It
does. The arcing stops, as it should. The burner lights after the proper time delay.
