Brand specialist
Worcester Bosch fault code diagnostics in Bath
Worcester codes are helpful but not always definitive. EA can be five different things. H07 is misleadingly named. As accredited Worcester installers we see these codes every week — the diagnosis is faster because we recognise the pattern.
For: Owners of a Worcester Bosch Greenstar with a fault code
How we read the code, not just the number
The code narrows it down; the accompanying sensor readings and combustion figures nail it. We pull live data via the display and back it up with a flue-gas analyser before committing to a part.
Codes we resolve most often
- EA — flame loss (ignition, gas valve or condensate)
- D5 — return sensor / heating flow issue
- H07 — low pressure sensor or top-up filling loop
- A281 — fan speed / flue sensor drift
- E9 — overheat / poor circulation
Frequently asked
- Can you fix on the first visit?
- For the codes above, in the vast majority of cases yes — we carry the common Worcester parts on the van.
- Does it affect my Worcester warranty?
- No — as accredited installers we can log the repair against your warranty record where appropriate.
- How much does diagnostics cost?
- A fixed call-out + first-hour diagnosis, credited against the repair if you go ahead. No surprises.
Book the visit
Send us the fault code and boiler model. We'll come with the right likely parts and diagnose against live data.
Related solutions
Core services
Where we cover
Worcester Bosch Accredited · 10 Year Guarantee*
New Worcester boiler with a 10 year guarantee*
Free no-obligation quotes for installation, servicing & repairs across BA & BS postcodes.