Worcester Bosch is one of the most common boiler brands in UK homes, and the Greenstar range covers everything from compact combis to higher-output models for larger households. We regularly work on Worcester boilers of all ages, from recent Greenstar 4000/8000 installs to older models that are well past their original warranty.
Common Worcester faults
- Ignition failures (often showing as an EA code)
- Fault lockouts after a failed ignition attempt (F28 / F29)
- Low pressure warnings (A1 / A6)
- No hot water from a blocked or failing plate heat exchanger — see our no hot water page for more detail on this fault
For a fuller list of codes, see our error codes page.
Recent Worcester work
We recently replaced an end-of-life boiler in Sutton Coldfield with a new, energy-efficient Worcester LPG combi, backed by a 10-year manufacturer guarantee — see the full case study.
New Worcester installation pricing
| Model | Warranty | Combi swap |
|---|---|---|
| Greenstar 1000 | 5 yr | £1,999 |
| Greenstar 4000 | 10 yr | £2,699 |
| Greenstar 8000 | 10 yr | £2,899 |
Combi swap pricing includes horizontal flue, wireless thermostat, magnetic filter, and system cleanse — same-position installs. Estimates only, confirmed after a site inspection.