A unit fails, a contractor attends, a part goes in, an invoice is paid. It fails again the following week and the club books it as a new job, because the person raising it is not the person who paid the last invoice. The contractor arrives without knowing what was done six days ago, and the diagnosis starts from the beginning on a unit that has already had its igniter replaced. In the twin, the unit holds its own callouts, its own parts and its own invoices, in order.
The heat is not working properly. Before anyone books a technician, the record says this unit was attended six days ago: igniter replaced, invoice raised, job closed. Same symptom, same unit, inside the week — that is a callback, not a new job. The copilot adds that an igniter which holds for six days usually points at the flame sensor or the gas valve, and puts the original job number and the dispatch reference on the work order before it goes out.
