Gas Safe Registered • London Engineers • Same-Day Availability
Flame not detected
The boiler has attempted ignition but has not detected the required flame signal.
Sometimes
Some Worcester models allow certain EA fault conditions to be reset, but the correct procedure depends on the appliance.
External checks only
You may be able to check basic things such as whether the property's gas supply is available and whether a condensate pipe is visibly frozen.
If EA persists or returns
A recurring EA fault can require professional diagnosis to establish why ignition or flame detection is failing.
EA → RESET → BOILER WORKS → EA RETURNS
If EA repeatedly returns, don't rely on continual resets. The reason the boiler is failing to establish or detect a flame needs to be identified.
Not always. Worcester Bosch fault codes can vary between models and generations.
Some boilers also show an additional cause code alongside EA.
Always check your exact boiler model before interpreting the fault.EA generally indicates that the boiler has attempted to ignite but has not successfully detected a flame. The exact meaning can depend on your Worcester Bosch model and any additional cause code shown.
On applicable Worcester Bosch boilers, EA together with cause code 227 relates to a flame not being detected after ignition. Check the instructions for your exact boiler model before interpreting the code.
Some Worcester Bosch boilers allow certain locking faults to be reset. Follow the reset procedure in your boiler's operating instructions. If EA returns, the underlying fault should be investigated.
A recurring EA code can indicate an ongoing ignition, gas supply, flame detection or related boiler fault. Repeatedly resetting the boiler will not repair the underlying problem.
On applicable boilers, a frozen or blocked condensate pipe can interfere with normal boiler operation. During freezing weather, check your boiler instructions for the manufacturer's recommended condensate checks.
No. An EA code does not automatically mean the boiler needs replacing. Many possible causes can be diagnosed and repaired by a qualified heating engineer.
You should limit DIY troubleshooting to safe external checks described in the manufacturer's instructions. Internal gas, combustion and electrical work should be carried out by a suitably qualified engineer.
An EA code does not automatically mean there is an emergency. What you should do next depends on whether the fault clears, keeps returning or appears alongside a possible safety warning.
If EA clears after following the correct instructions for your boiler model, continue to monitor the appliance for any further lockouts or loss of heating.
Professional diagnosis is recommended if EA returns after a reset, the boiler repeatedly locks out or your heating and hot water cannot be restored.
Stop checking or resetting the boiler if you smell gas, suspect a gas leak or your carbon monoxide alarm activates.
Do not use electrical switches, flames or anything that could create a spark.