Worcester Bosch Greenstar CDi Classic System ErP fault EA
Flame not detected/ignition lockout
Gas boilerWhat it means
The appliance has failed to detect a flame during ignition, resulting in an ignition lockout.
Likely causes
- Gas cock turned off
- Incorrect gas supply pressure
- Power supply issue
- Faulty igniter electrode and lead
- Faulty ionisation sensing electrode and lead
- Incorrect CO2 level
- Blocked flue
- Blocked or frozen condensate pipe
Where to start
- Check gas supply pressure
- Check power supply
- Check igniter electrode and lead
The full answer, free
- 4 more checks in order
- How to put it right, step by step
- The manual page for this fault (page 52), right under the answer
Safety: Isolate gas and power before you open the case. If you have been into the gas side, do a tightness test, and a combustion and flue check before you hand back. Gas Safe (UK) or RGI (Ireland) work only.
From the Worcester Bosch manual for the Greenstar CDi Classic System ErP. Check the model on the data plate before you order parts.