| E01 |
Ignition failure – the boiler has attempted to light 5 times and not succeeded – check the gas supply is on |
| E02 |
False flame – possibly a problem with the power supply |
| E03 |
Boiler overheat – check that any valves to the heating circuit have not been shut down, no air in the system and that the water pressure is correct |
| E05 |
Fan failure – boiler cannot detect fan rotation – check fan operation and both connectors onto fan |
| E07 |
Flue overheat – check combustion and flue temperature vs. return temperature – the flue temperature should be no more than 10C above return temperature. Possible heat exchanger fault. |
| E08 |
Flame circuit error – possible control box fault |
| E09 |
Valve drive error – possible gas valve or control box fault |
| E10 |
Control box errors – possible faulty control box |
| E11 |
The automatic test for calibration of flow and return sensors has failed – check both flow and return sensors are located on the correct pipes and are producing the correct readings |
| E12 to E22 |
Control box errors – possible faulty control box |
| E23 |
Water filling error – check water pressure sensor |
| E24 |
Water pressure lost 4 times in 24 hours – possible leak, check system and boiler |
| E25 |
Control box errors – possible faulty control box |
| E26 |
Flame drop out – check for obstruction of the flue and/or air terminals, blockage/freezing of the drain pipe or a low gas supply (LPG). |
| E30 |
Flow sensor short circuit – check connections to flow sensor |
| E31 |
Flow sensor open circuit – check connections to flow sensor are in place |
| E32 |
DHW sensor short circuit – check connections to domestic hot water (DHW) sensor |
| E33 |
Domestic hot water (DHW) sensor short circuit – check connections to DHW sensor are in place |
| E34 |
Mains supply voltage < 180V – may be a problem with your power supply |
| E35 |
Mains supply frequency incorrect – may be a problem with the power supply |
| E37 |
Water pressure error – increase the system water pressure |
| E38 |
Reset key fault – replace fascia PCB |
| E40 |
Water pressure too high |
| E41 |
Communication error between fascia and control box – check cables |
| E43 |
Return sensor short circuit – check connections to return sensor |
| E44 |
Return sensor open circuit – check connections to return sensor are in place |
| E45 |
Flue sensor short circuit – check connections to flue sensor |
| E46 |
Communication error between fascia and control box – check cables |
| E99 |
Flue sensor short circuit – check connections to flue sensor are in place |