Zanussi Boiler Fault Codes

53 fault codes across 3 Zanussi boiler models — explained in plain English.

Appliance brand. Limited boiler range in the UK market.

53 fault codes
3 models documented
0 currently sold
3 legacy models
Just want the most common Zanussi problems?
The top 8 faults across the whole Zanussi range — causes, DIY checks, repair costs.
Most serious

High-severity Zanussi fault codes

L1
Your boiler has shut down because the water inside it has become too hot, usually due to a lack of circulation or a blockage in the system.
Ultra Combi
 uP
Your boiler is currently stuck in its startup or programming sequence and is not yet ready to provide heat or hot water.
Ultra Combi
 oF
Your boiler is in a standby or programming mode and thinks it has been told to stay switched off.
Ultra Combi
 C2
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.
Ultra Combi
 L1
Your boiler has shut down because the water inside it has become too hot, usually due to a lack of circulation or a blockage in the system.
Ultra System
All models

3 Zanussi boiler models

Ultra Combi
Combi Discontinued
7 fault codes · 2005-2017
Ultra System
System Discontinued
8 fault codes · 2005-2017
Ultra Plus Combi
Combi Discontinued
38 fault codes · 2014-2017
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