Handsworth: Greenstar 30i ErP with an H09 fault
Diagnosed as a faulty circuit board. New board from van stock, back up and running in one visit.
Read the case studyIndependent Gas Safe engineers who fix Worcester Greenstar boilers every week: EA faults, ignition lockouts, leaks and pressure loss, with the common parts on the van.
We repair Worcester Bosch boilers across Birmingham and the Black Country, from the Greenstar i and Si ranges to the CDi and the older Ri and Junior. In office hours (Mon–Fri 8am–5.30pm) the callout is £99, which covers a full diagnosis and the first hour of labour, and you get the total price before we fit anything. Common Worcester service parts such as electrodes, burner gaskets and hinge clips are on the van; gas valves and manifolds we source the same day where a local supplier has them. We are independent, not tied to Worcester, and we will tell you straight when a repair is the right call and when it is not.

Four details and we will get back to you to arrange a time. Prefer to talk? Call 07413 385767.
£99 in office hours (Mon–Fri, 8am–5.30pm) covers attendance, diagnosis and the first hour. Parts and any further work are quoted and agreed before we carry on. Out of hours, the price is quoted by phone before we set off.
No travel charge within 10 miles of B20 2JS. Further out, £2 per mile may apply — always agreed before anything is booked. Full price list
Smell gas now? Do not use this form or wait for a reply. Call the National Gas Emergency Service free on 0800 111 999 (24 hours). If you are using a mobile, make the call from outside. Open doors and windows, do not switch electrics on or off, do not smoke or use naked flames, and turn the gas off at the meter if it is safe to do so, unless the meter is in a cellar or basement. Once the supply has been made safe, we can trace and repair the fault.
Worcester Bosch is the most common boiler in Birmingham homes, so most weeks we have one open. The faults repeat, and so do the fixes. These are the ones we see most, each linked to a real job with photos.
| Code | What it means | Usual causes |
|---|---|---|
| EA | Flame not detected | Electrode, gas supply or valve, fan, control board |
| E9 | Overheat | Pump, circulation, blockage, safety thermostat |
| C6 | Fan speed wrong | Fan, fan wiring, air pressure switch |
| A1 | Pump running dry | Low pressure, air in the system, pump |
Press reset once. If the code comes back, stop resetting and ring us with the code and the model, which is on the label behind the drop-down flap. The code tells us where to start looking, not which part has failed: EA can be a £15 electrode or a gas valve, and only the diagnosis on site settles it, which is what the £99 covers. Our guide to boiler fault codes covers Worcester alongside ten other makes.
Two of the five Worcester jobs on this page were boilers other engineers had written off. One turned out to be a gasket and an electrode. One was two plastic clips. Worcester boilers are well supported, spare parts are easy to get, and a Greenstar that is properly maintained runs for a long time.
There is a point at which a boiler is not worth repairing: past twelve years old, on its second or third major part, with a corroding heat exchanger. If yours is there, we will say so and put the repair price and the replacement price side by side. If it is not, a £99 diagnosis is a small price against a new boiler.
The van carries the Worcester parts that fail most often: electrodes, burner gaskets and seals, hinge clips, sensors and common valves. That is why most of our Worcester repairs are finished on the first visit. Gas valves, manifolds and condensate collectors are specific to the model, so we do not carry every one, but where a trade supplier within reach has the part in stock we collect it the same day rather than leave you waiting on an order.
We are independent engineers, not a Worcester-accredited installer, and we say so. What you get is a Gas Safe registered engineer who works on these boilers every week, tests before replacing anything, and finishes every repair with a flue gas analyser reading.
Worcester's guarantee depends on an annual service, documented, and so does the boiler's life. A basic service is £95 and includes a combustion check on the analyser. Every five to eight years a full strip-down, £185 with gaskets and inhibitor included, cleans the heat exchanger and burner and replaces the seals that cause most of the faults above before they start.
Seven Worcester jobs written up with the photos our engineers took. More are added as we do them.
Diagnosed as a faulty circuit board. New board from van stock, back up and running in one visit.
Read the case studyOn site within 30 minutes after a 10pm call. Flow adapter on the right-hand manifold replaced from van stock the same night.
Read the case studySafety checks traced it to a faulty gas valve, ordered and fitted on the return visit. Returning customer.
Read the case studyPrevious engineers said new boiler. Perished burner gasket and a damaged electrode, both from van stock.
Read the case studyDiagnosed, part sourced locally, collected and fitted the same day. No return visit.
Read the case studyCombustion box stripped out, collector and seals replaced, analyser 79 ppm CO afterwards.
Read the case studyA snapped hinge clip, a common fault we carry the part for. Both clips replaced, no new boiler.
Read the case studyWe also repair Vaillant, Baxi, Ideal, Glow-worm, Viessmann, Potterton and Ferroli boilers. Every other make is covered on our main boiler repair page.
| Job | Price |
|---|---|
| Worcester fault diagnosis + first hour of repair (Mon–Fri 8am–5.30pm) | £99 |
| Outside office hours | Quoted by phone before we set off |
| Parts | Quoted before we fit |
| Parts-only warranty on repairs | 12 months |
| Basic boiler service (combustion check included) | £95 |
| Full strip-down service (gaskets and inhibitor included) | £185 |
| Like-for-like Worcester combi swap, fitted | from £1,999 |
The £99 is a fixed charge for attendance, diagnosis and the first hour in office hours (Mon–Fri 8am–5.30pm); it is not the price of every repair, and parts and further work are quoted and agreed before we carry on. Service prices are the price for the job as described, the "from" installation price is confirmed in writing after a free survey, and out-of-hours work is quoted by phone before we set off. No travel charge within 10 miles of B20 2JS; further out, £2 per mile may apply, agreed before booking. How our prices work.
£99 diagnosis + first hour
£99 in office hours (Mon–Fri, 8am–5.30pm) covers attendance, diagnosis and the first hour. Parts and any further work are quoted and agreed before we carry on. Out of hours, the price is quoted by phone before we set off.
No travel charge within 10 miles of B20 2JS. Further out, £2 per mile may apply — always agreed before anything is booked.
In office hours, £99 covers the callout, a full diagnosis and the first hour of labour. Once we know the fault you get the total price, including any part, before we carry on. Common parts like electrodes and gaskets are inexpensive and on the van; a gas valve or manifold is quoted before we order it.
EA is Worcester's code for a flame that could not be established or proved. It is one of the most common codes and it has several possible causes, from the electrode to the gas valve, so it needs testing rather than a guess. Press reset once; if it returns, ring us with the code and the model.
No, and we would rather tell you than let you assume. We are independent Gas Safe registered engineers who repair Worcester boilers every week and carry their common parts. We belong to the Vaillant and Baxi installer schemes, which are loyalty schemes and not approvals either. For a repair, what matters is a proper diagnosis and the right part, and that is what you get.
Usually. Most Worcester faults come down to parts we carry, so the repair is done on the first visit. Where a model-specific part is needed we source it locally the same day if a supplier has it, as we did with a manifold in Solihull, and order it only when there is no other way.
Repair it unless it is past about twelve years old, on its second or third major part, or its heat exchanger is corroding. We check first and show you what we find. If it is time, a like-for-like Worcester swap starts at £1,999 fitted; if it is not, most repairs are far less than that.
We cover Birmingham and the surrounding towns. Pick your area for local detail.
From £1,999 fitted
From £95
£90 (boiler + cooker)
£99 (Mon–Fri 8am–5.30pm)
From £99 in office hours
From £550, up to 10 radiators
£99 in office hours covers diagnosis and the first hour. Common Worcester parts are on the van.