Worcester Bosch · Greenstar 4000 Combi
1017 boiler fault code
Greenstar 4000 Combi
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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.
What 1017 means
System pressure is too low.
Safe check
The Greenstar 4000 manual says to recharge the system when the pressure indicator reads below 0.8 bar. Use only the filling method explained by your installer.
When to contact an engineer
Contact your installer or maintenance engineer if the pressure repeatedly falls or rises.
Safety notice
A boiler fault code alone is not a gas or carbon-monoxide emergency. 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.
Source and provenance
- Greenstar 4000 Combi Installation Manual · 6 720 891 161 · §10.1.2 Operating/Fault code table, code 1017, printed p. 75
installation and maintenance instructions
2021/10 · listed for appliances manufactured from 01/10/2023 onwards
- Greenstar 4000 Combi Operating Manual · §3.1.2, p. 7
user instructions
2020/09 · 6 720 891 170