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

Zanussi fault codes on this site

We document 53 fault codes across 3 Zanussi models, covering 39 distinct codes. Zanussi boilers use a mix of numbered codes and light or status indications. Codes for 3 of these models are taken directly from the manufacturer's own service or installation manual. Zanussi is a smaller name in the UK market, and if you own one this is likely one of the few places its fault codes are collected in one place.

Models covered: Ultra Combi, Ultra System, Ultra Plus Combi.

Codes that appear on the most Zanussi models:
L1 P1 SE uP oF C2
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
Boiler cover options

Avoid the next call-out bill

Monthly cover means no unexpected bills when your boiler breaks down.

Approved partner
Domestic Appliance Guard
Unlimited call-outs, 24/7 helpline, no price-hike promise
Get a quote →

Affiliate links. We may earn a commission at no extra cost to you.