During our visit, a tankless diagnosis was completed on the customers Rinnai water heater. After speaking with the manufacturer regarding the code 10, they recommended that we take the unit apart, and clean the fan and burners. Both the fan and burner tray were removed and cleaned free of any bugs or debris. After this repair was complete, the unit was put back together and tested for operation. The code 10 was no longer an issue after the repair was complete.