Fault Codes

Listed below are the common Intergas fault codes as described by the boiler manufacturer along with a possible cause.

Intergas Boiler Error Codes

Fault CodeSystem Behaviour
10, 11, 12, 13, 14 Sensor fault S1
20, 21, 22, 23, 24 Sensor fault S2
0.0 Low system pressure
0 Sensor fault after self check
1 Temperature too high
2 S1 and S2 interchanged
4 No flame signal
5 Poor flame signal
6 Flame detection fault
8 Incorrect fan speed
27 Shortcut outside sensor temperature
29, 30 Gas valve relay faulty

Intergas Xtreme and Xclusive Boiler Error Codes

Fault CodeSystem BehaviourPossible solution / cause
F000 Sensor defect Heat exchanger sensor needs replacing.
F001 Temperature too high during central heating demand Air could be in system, central heating system needs bleeding. There could be an error with the pump & it could need replacing.
F002 Temperature too high during domestic hot water (DHW) demand The wiring of DHW sensor needs checking, possible breakage.
F003 Flue gas temperature too high Heat exchanger needs checking for contamination.
F004 No flame during startup Gas valve is closed. Condensation drain is blocked and ignition needs checking.
F005 Flame disappears during operation Condensation drain could be blocked, the air supply duct and flue needs checking for possible recirculation or blockage of flue gases.
F006 Flame simulation error Gas valve could need replacing or burner controller could need replacing.
F007 No or insufficient ionisation flow Wiring of ionisation/ignition pin could have a breakage shut down and could need replacing.
F008 Fan speed incorrect Fan cable needs checking, fan or burner controller could need replacing.
F009 Bunner controller has internal fault Burner controller needs replacing.
F010, F011 Sensor fault Possible issue with heat exchanger sensor, breakage or not connected properly.
F012 Sensor 5 fault Wiring for flue gas sensor needs checking, possible breakage.
F014 Mounting fault sensor Heat exchanger sensor is not mounted correctly and needs to be mounted properly.
F015 Mounting fault sensor S1 Central heating flow sensor is not mounted correctly and needs mounting properly.
F016 Mounting fault S3 Domestic hot water sensor is not mounted correctly and needs mounting properly.
F018 Flue and / or air supply duct is blocked The flue and/or air supply duct could need cleaning.
F019 BMM error Check the BMM wiring for breakages / BMM wiring could need replacing.
F027 Short circuit of outdoor sensor Outdoor sensor could have a wiring issue, check and replace the outdoor sensor.
F028 Reset error The reset button needs checking for unintentional operation e.g. cleaning of control panel. Burner controller might need replacing.
F029 Gas valve error Gas valve needs checking for leakage / burner controller could need replacing
FO30 Sensor S3 fault Check wiring of domestic hot water sensor for breakage or shutdown domestic hot water sensor – it could need replacing.
F031 Sensor fault S1 Check wiring of central heating flow sensor for breakage and shutdown. Check that weather central heating flow sensor is connected correctly.