Error code
Worcester Bosch Boiler Fault Code EA
The boiler failed to establish a flame The most likely cause is gas supply interruption or prepaid meter issue. Check first: check the boiler display, programmer, thermostat, and any obvious user controls.
Quick answer
EA: what does it mean and how to fix
What does it mean?
The boiler failed to establish a flame
How to fix first
Check whether other gas appliances have a working supply, without dismantling the boiler.
Why is this happening?
Gas supply interruption or prepaid meter issue
Fix time
One safe reset, then engineer
Difficulty
Engineer only if persistent
Homeowner checks should stay limited to supply, controls, condensate guidance where suitable, and one permitted reset.
Expected outcome: A supply interruption may clear once; repeat EA means ignition or flame proving needs Gas Safe diagnosis.
When should I call an engineer?
Call a Gas Safe registered engineer if EA returns after one reset, other gas appliances work normally, the condensate pipe is not the issue, or the boiler repeatedly clicks or locks out.
What does this error code mean?
Worcester Bosch boiler fault code EA usually means the boiler tried to start but did not prove a stable flame. It is an ignition lockout, so safe user checks are limited to supply and controls rather than anything inside the boiler.
If the display points more toward fan or flue operation, compare it with Worcester Bosch C6; repeated ignition lockouts should be treated cautiously.
This code sits in the ignition and flame proving path, including gas supply, condensate conditions, electrodes, flame sensing, fan, gas valve, flue, and controls.
Symptoms users may notice
- The boiler may click or try to fire before locking out.
- Heating and hot water may both be unavailable.
- The fault may appear after a gas supply interruption or during very cold weather.
What users often notice
- The boiler may sound as though it is trying to start, but the burner does not stay lit.
Why is this happening?
- Gas supply interruption or prepaid meter issue
- Condensate pipe frozen or blocked on suitable models and weather conditions
- Ignition lead, electrode, or flame sensing problem
- Gas valve, fan, flue, or control fault requiring professional diagnosis
What this usually points to
This code sits in the ignition and flame proving path, including gas supply, condensate conditions, electrodes, flame sensing, fan, gas valve, flue, and controls.
How to fix this safely
- Check whether other gas appliances have a working supply, without dismantling the boiler.
- Check the boiler display, programmer, thermostat, and any obvious user controls.
- If the manual allows it, try one standard reset.
- In freezing weather, follow Worcester Bosch user guidance for a frozen condensate pipe only if it is externally accessible and safe.
What not to do
- Do not keep resetting the boiler repeatedly.
- Do not remove the casing or adjust gas components.
Common misdiagnoses
- EA is sometimes blamed on the thermostat, but the code usually means the boiler itself did not prove ignition.
Reset steps
- Follow the reset instructions shown on the boiler control panel or in the Worcester Bosch manual.
- Wait for the boiler to attempt ignition once.
- If EA reappears after one reset, book a Gas Safe registered engineer.
Intermittent vs persistent faults
A one-off EA after a supply interruption may clear with one permitted reset; repeated EA needs professional diagnosis.
When to call an engineer
Call a Gas Safe registered engineer if EA returns after one reset, other gas appliances work normally, the condensate pipe is not the issue, or the boiler repeatedly clicks or locks out.
Safety warning
Do not remove the boiler casing or try to work on gas, ignition, or combustion components yourself.
Useful hub links
Related ignition fault codes
Worcester Bosch Boiler Fault Code A1
The boiler is detecting poor water circulation
Worcester Bosch Boiler Fault Code C6
Fan, flue, or air pressure sensing problem
Worcester Bosch Boiler Fault Code D1
Control board or internal communication fault
Worcester Bosch Boiler Fault Code 229
The boiler has overheated or hit a high temperature limit
Relevant guide
Frequently asked questions
Can I keep resetting a Worcester Bosch boiler with EA?+
No. One permitted reset is enough. If EA returns, continuing to reset can mask an ignition or flame-sensing fault.
Can I still use a Worcester Bosch boiler with EA showing?+
No. If EA remains after one permitted reset, leave the boiler off and arrange qualified help rather than forcing repeated starts.
Can a frozen condensate pipe cause Worcester Bosch EA?+
On some installations in cold weather, yes. Only follow the manual's external condensate guidance if the pipe is safely accessible.
Does EA mean my gas is off?+
It can, but not always. If other gas appliances work normally, the fault is more likely within the boiler ignition or flame proving system.
Should I open the boiler casing for EA?+
No. Ignition, gas, combustion, and flame-sensing checks must be left to a Gas Safe registered engineer.