1017Worcester Bosch
Worcester Bosch 1017: water pressure too low
Checked against Worcester Bosch's own documentation: Worcester Greenstar 8000 Life installation and maintenance instructions: fault code table and 2 more sources. Last reviewed October 2026. How we check
You can usually fix this
Worcester Bosch describes 1017 on Greenstar 8000 Life boilers as: water pressure too low.
Recommended pressure when cold for Worcester Bosch boilers: 1.0 to 1.5 bar.
What you can safely do
- Let the heating cool down, then read the pressure gauge.
- Worcester Bosch says to re-charge the system if it reads less than 1 bar. Top up through the filling loop until it reads 1 to 1.5 bar, following your user manual.
- Close the filling loop fully.
Call a Gas Safe engineer if
- You need to top up more than once or twice a year. Worcester says to contact your installer.
- You can see water leaking.
Find a Gas Safe engineer near you
Opens the official Gas Safe Register search.
Applies to Greenstar 8000 Life. Codes can differ between models, so check your manual.