Worcester Bosch · Greenstar Highflow CDi ErP
F0 boiler fault code
Greenstar Highflow 440CDi ErP & 550CDi ErP
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What F0 means
Internal error.
Gas Safe engineer: Contact a Gas Safe registered engineer for diagnosis.
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 shown on the display. Do not open, adjust or repeatedly reset the boiler. Contact a Gas Safe registered engineer.
When to contact an engineer
Contact a Gas Safe registered engineer for diagnosis.
Source and provenance
- Greenstar Highflow CDi ErP User Instructions 6 720 818 076 (2015/12) · §7.1 Error codes, printed p. 14
user instructions
2015/12
- Greenstar Highflow 440CDi ErP & 550CDi ErP Installation, commissioning and servicing instructions 6 720 818 077 (2016/04) · §7.5 Fault finding Table 17, printed p. 46
installation, commissioning and servicing instructions
2016/04