Worcester Bosch · Greenstar Si Compact ErP

D3 boiler fault code

Greenstar Si Compact ErP

Get a Gas Safe engineer

Free. Enter your postcode.

What D3 means

External cut-off switch activated.

Gas Safe engineer: Contact a Gas Safe registered engineer.

If you smell gas, a CO alarm sounds, anyone feels unwell, or there is an unsafe flame, leave and call 0800 111 999 from outside.

Renting? Report it to your landlord or housing provider first. They are responsible for gas safety and boiler repairs, and the repair should not cost you.

Safe check

Note the code. Do not open or adjust the boiler, or repeatedly reset it. Contact a Gas Safe registered engineer.

When to contact an engineer

Contact a Gas Safe registered engineer.

Source and provenance

Greenstar Si Compact ErP Installation, Commissioning and Servicing Instructions 6 720 813 278 (2015/07) · §8.5 Information and service menus, Status codes, printed p. 63
installation and service instructions
2015/07 · 6 720 813 278