Worcester Bosch EA Fault Code (Greenstar i ErP combi)

Safety disclaimer

Fault code summary

Manufacturer

Worcester Bosch

Fault code

EA

Fault type

Flame failure, Ignition, Gas supply, Condensate, Flue

Severity

high

Reset

Not specified

Applicable models

ErP Greenstar 25i, ErP Greenstar 30i

Quick answer

Flame not detected; the official user guide lists no/low gas supply, blocked condensate outlet and blocked flue as possible causes for the displayed EA fault.

What does this fault code mean?

Flame not detected; the official user guide lists no/low gas supply, blocked condensate outlet and blocked flue as possible causes for the displayed EA fault.

Common causes

• No gas supply or low gas supply pressure.
• Condensate outlet blocked.
• Flue blocked.

Symptoms

• EA fault code flashes on the display.

What can the homeowner safely check?

• If safe to do so, check the gas supply, condensate outlet and flue outlet for an obvious blockage; do not dismantle the boiler.

Boiler reset information

Reset information was not provided in the verified manufacturer source. Do not repeatedly reset an unresolved fault.

When should I call an engineer?

Contact a suitably qualified heating engineer when the fault persists, the boiler locks out, or the manufacturer instructions do not resolve it. For gas appliance work in the UK, use a Gas Safe registered engineer.

Engineer diagnosis

• Investigate gas supply, flame detection, condensate discharge and flue termination.

Applicable boiler models

• ErP Greenstar 25i
• ErP Greenstar 30i

Related fault codes

No related verified fault codes are available for this range.

Manufacturer documentation

EA fault code flashing on display | No gas supply/low gas supply pressure; Condensate outlet blocked; Flue blocked

Last verified

2026-09-12

Frequently asked questions