Worcester Bosch · Greenstar CDi Classic ErP Combi
C6 boiler fault code
Greenstar CDi Classic ErP Combi
Get a Gas Safe engineer
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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 C6 means
C6 indicates that the fan speed is too low.
Safe check
Do not try to rectify this fault yourself; arrange a Gas Safe registered engineer.
When to contact an engineer
Arrange a Gas Safe registered engineer to investigate this fan fault.
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 CDi Classic ErP Combi · 6 720 815 728 · C6, p. 16
user instructions
2015/05 · 6 720 815 728