BAXI Duo-tec Combi 33 HE A Boiler Fault Codes

Error Codes

1. If a fault occurs on the boiler an error code may be shown by the facia display.

2. The codes are either two or three digit, preceded by the letter 'E'. For example, code E133 will be displayed by 'E1' alternating with '33'. E50 is shown as 'E' then '50'

- E20, E28 & E50 indicate faulty components.

- E110 shows overheat of the primary water and E130 overheat of the flue system.

- E119 is displayed when the primary water pressure is less than 0.5 bar.

- E133 indicates that the gas supply has been interrupted, ignition has failed or the flame has not been detected.

- E125 is displayed in either of two situations:-

i) If within 15 seconds of the burner lighting the boiler temperature has not changed by 1°.

ii) If within 10 minutes of the burner lighting the boiler temperature twice exceeds the selected temperature by 30°. In these instances poor primary circulation is indicated.

3. By turning the selector switch to the 'Reset' position for a minimum of 5 seconds when E110, E130 & E133 are displayed it is possible to relight the boiler.

4. If this does not have any effect, or the codes are displayed regularly further investigation is required.

Code	Fault
E20	Central Heating NTC Fault
E28	Flue NTC Fault
E50	Hot Water NTC Fault
E110	Safety Thermostat Operated
E119	Water Pressure Switch Not Operated
E125	Circulation Fault (Primary Circuit)
E130	Flue NTC Operated
E133	Interruption Of Gas Supply or Flame Failure
E160	Fan or Fan Wiring Fault
E193	Pre-Circulation Fault