Worcester Bosch Greenstar 4000 Repair and Installation London — 25kW and 30kW

Worcester Bosch Greenstar 4000 — Repair and Servicing in London

The Worcester Bosch Greenstar 4000 is the mid range combi boiler in Worcester Bosch’s current residential lineup, sitting between the entry level Greenstar 2000 and the premium 8000 Style. It was introduced to replace the previous Greenstar i range and offers a good balance of reliability, efficiency and warranty at a mid market price point. Your local Worcester Bosch specialist at 247 Plumber London installs, repairs and services the Greenstar 4000 across the whole of London.

Greenstar 4000 Models

Model	Output	Best For	Warranty
Greenstar 4000 25	25 kW	Flat or 1 to 2 bed house, 1 bathroom	Up to 10 years
Greenstar 4000 30	30 kW	2 to 3 bed house, 1 to 2 bathrooms	Up to 10 years

The Greenstar 4000 offers up to ten years warranty when installed by a Worcester Bosch Accredited Installer. It is ErP A efficiency rated, compatible with Worcester Bosch Wave and other smart thermostats, and uses an aluminium heat exchanger that is well proven in normal water conditions. In London’s hard water areas, a scale reducer on the cold inlet is particularly recommended.

Common Greenstar 4000 Faults

As a relatively recent model, the Greenstar 4000 range is not yet old enough for widespread major component failures across London’s installed base. The most common callouts we attend on the 4000 are the winter condensate pipe freeze causing a lockout, the EA 227 ignition fault following extended periods without use, and low system pressure from a system leak elsewhere. These are all straightforward repairs on the first visit.