- Boilers
- Gas boiler
EA
Worcester EA fault: flame not detected
Risk level
High
Professional inspection is recommended.
Urgency
High
Quick answer
On the documented Greenstar FS CDi and Highflow 440CDi scopes EA means the boiler did not detect a flame. Confirm the exact model because code systems vary across Worcester ranges.
Safety first
Stop and check this first
- If you smell gas or suspect a leak turn the appliance off do not touch it call 0800 111 999 open doors and windows and follow HSE emergency guidance.
- EA is documented here only for the named Greenstar scopes. Confirm the exact model manual and do not transfer this meaning to every Worcester boiler.
Safe checks you can perform
- Record the full Worcester model and the exact EA display
- Ask the gas supplier to confirm a supply problem
- Inspect only an accessible external condensate outlet
- Use only the reset described by the exact manual
Leave these tasks to a qualified professional
- Do not attempt this professional task: Inspect the gas valve flue and inaccessible condensate route
- Do not attempt this professional task: Check working gas pressure and the ignition sequence
What a technician must be able to justify
Technician visit
These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.
These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.
Inspect the gas valve flue and inaccessible condensate route
What they doA competent engineer should test gas-valve operation and inspect internal or inaccessible flue and condensate paths when the model-specific procedure requires it.
Check working gas pressure and the ignition sequence
What they doA Gas Safe registered engineer should confirm gas presence and working pressure then test the ignition and flame-sensing electrodes and their harnesses against the exact Worcester service instructions.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Follow these steps
Note: Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
Record the full Worcester model and the exact EA display
Photograph the display and identification label without removing the casing. Use the operating instructions for that exact Greenstar model before interpreting or resetting the code.
Worcester states that its instructions apply only to the models identified in that document.
Evidence: Worcester Greenstar FS CDi ErP user instructions · Worcester Greenstar Highflow 440CDi ErP installation and servicing instructions
Ask the gas supplier to confirm a supply problem
If there is no smell of gas and the appliance is not suspected unsafe contact the gas supplier when the household supply appears absent or low. Do not open the boiler or test gas pressure yourself.
A suspected leak is an emergency and must not be treated as an ordinary EA supply check.
Evidence: HSE gas safety for homeowners · Worcester Greenstar FS CDi ErP user instructions
Inspect only an accessible external condensate outlet
From ground level and only if safe look for visible ice or an external obstruction. Worcester permits warm water a hot-water bottle or a warm cloth for a frozen external pipe and says never to use boiling water.
Do not climb work at height open the boiler or attempt to clear an internal condensate route.
Evidence: Worcester Greenstar FS CDi ErP user instructions
Use only the reset described by the exact manual
After a safely accessible frozen condensate pipe has been thawed follow the model instructions for one restart. If EA returns stop and arrange qualified diagnosis.
A reset does not prove that gas pressure ignition sensing flue or valve conditions are safe.
Evidence: HSE gas safety for homeowners · Worcester Greenstar FS CDi ErP user instructions
Still not solved
If the error persists, stop here. See what the technician must do and show you.
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- Boilers
- Brand
- Worcester Bosch
- Product type
- Gas boiler
Known code variants
- Bosch EA caldera
- caldera Worcester EA
- Cerapur EA
- E A
- E-A
- EA 227
- Error EA Junkers
- error EA Worcester Bosch
- Junkers EA
- Worcester boiler EA fault
- Worcester Bosch EA
- Worcester EA
What it means
Worcester lists absent or low gas supply and accessible external condensate or flue obstruction in its homeowner checks. Internal gas pressure ignition flame-sensing and gas-valve tests require a Gas Safe registered engineer.
Warnings and stop conditions
- Criticalsource verified
If you smell gas or suspect a leak turn the appliance off do not touch it call 0800 111 999 open doors and windows and follow HSE emergency guidance.
Evidence: HSE gas safety for homeowners
- Highsource verified
EA is documented here only for the named Greenstar scopes. Confirm the exact model manual and do not transfer this meaning to every Worcester boiler.
Evidence: Worcester Greenstar FS CDi ErP user instructions · Worcester Greenstar Highflow 440CDi ErP installation and servicing instructions
Symptoms and causes
Probable causes · in order
- Flame not detected on the documented Greenstar scopeConfirmed
Worcester defines EA as flame not detected in the Greenstar FS CDi user instructions and the Greenstar Highflow 440CDi service instructions. The exact product manual still controls the meaning.
Evidence: Worcester Greenstar FS CDi ErP user instructions · Worcester Greenstar Highflow 440CDi ErP installation and servicing instructions
- No gas supply or gas pressure below the required levelPossible
The homeowner guide lists no gas supply or low gas-supply pressure while the service instructions require a competent person to check gas presence and working pressure.
Evidence: Worcester Greenstar FS CDi ErP user instructions · Worcester Greenstar Highflow 440CDi ErP installation and servicing instructions
- Accessible external condensate or flue obstructionPossible
For the Greenstar FS CDi scope Worcester lists a blocked condensate outlet or flue among the EA branches and restricts homeowner observation to conditions that are safe to access.
Evidence: Worcester Greenstar FS CDi ErP user instructions
- Ignition flame-sensing or gas-valve faultPossible
The service instructions list the ignition electrodes and harness flame-sense electrode and harness and gas-valve operation as professional diagnostic branches.
Evidence: Worcester Greenstar Highflow 440CDi ErP installation and servicing instructions
Virtual technician
Does EA still appear after these checks?
Answer a few questions to narrow down the likely cause and the safest next action. Guidance only - it never replaces a professional.
Sources and technical references
- 1
Health and Safety Executive · official_doc
- 2
Worcester Greenstar FS CDi ErP user instructions
Worcester Bosch · 2015 · manual
- 3
Worcester Greenstar Highflow 440CDi ErP installation and servicing instructions
Worcester Bosch · 2015 · manual
Was this entry useful?