BoilerFaultCodesZanussi C2 Fault Code
The Zanussi C2 fault code means: your boiler has lost communication with its internal computer chip, meaning the main control board no longer recognizes the specific model it is supposed to be operating.. It appears on 3 Zanussi models in our database.
Technical description: BCC Fault
What causes the Zanussi C2 fault?
This fault occurs when the boiler's main control board loses the vital data connection to its identity chip, effectively 'forgetting' which model it is. The most common reason is a loose or failing Boiler Chip Card (BCC) that has vibrated out of place or suffered a small electrical surge that corrupted its memory.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Avoid the next call-out bill
A cover plan would handle faults like C2: no call-out fees, no surprise bills.
Affiliate links. We may earn a commission at no extra cost to you.
Zanussi models that show the C2 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Zanussi C2 fault code information on this page is sourced and cross-checked against the official Zanussi service / installation manuals for each affected model.
- Zanussi Ultra Combi manual (PDF)
- Zanussi Ultra Plus Combi manual (PDF)
- Zanussi Ultra System manual (PDF)
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026