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Updated: April 27, 2024

Zanussi Boiler Error Codes

History of Zanussi.

To begin with, Zanussi was established in 1916. The Electrolux Group owns the company. What is more, Zanussi is the second-largest appliance maker in the world. They are well known for producing both home appliances as well as boilers.

According to the company, they are globally recognised for the quality of their products as well as their innovative approach. They are also known for their modern designs which can be quite distinctive.

Their boiler brand mainly includes two models of boilers:

  • The Zanussi Ultra Combi which has an output of 30kW and 35kW.
  • The Zanussi Ultra System with an output of 15kW to 30kW.

What are some of the features of Zanussi boilers?

What distinguishes Sanussi boilers is that they are compact in design and lightweight. These features will allow them to be neatly installed inside the standard kitchen cupboard. They also have the following features:

  • A simply and easy-to-read display screen.
  • Simple diagnostics for control of your boiler.
  • Compatibility with several controls.
Error Codes

What are the benefits of Zanussi boilers?

  • A vast range of additional flueing options
  • Preformed copper tails
  • Pipe connections which are concealed
  • Mains lead which are pre-wired
  • Stand-off kit and pre-pipe options
  • An easy-to-read digital display and simple diagnostics
  • Easy access to both PRV and AAV
  • Universal condensate connection

What are the error codes of Zanussi boilers?

On this page, we will list all the possible error codes as well as the faulty codes you can experience with Zanussi boiler. Knowledge of these codes can help you understand what is going on in your boiler and will enable you to inform your Gas Safe engineer of the specific issue.

If your boiler warranty is still valid, you can call the Zanussi and they should fix it for you. However, to get this service, you have to meet the conditions of your warranty, such as getting your boiler serviced annually and so on.

On the other hand, if the warranty of your boiler is no longer valid and your boiler is costly to fix, then we recommend getting a new boiler replacement from Let’s Heat. We have an excellent staff of Gas Safe engineer which will do their best to carry out the job to the highest standards.

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Zanussi Boiler Error Codes


A C0 error code would usually indicate a boiler chip card (BCC) activation fault.


This error code can mean that there is Boiler chip card (BCC) fault.


This can simply refer to a low water pressure.


An F2 error code can simply mean flame loss.


F3 can indicate to a fan fault.


This error code can mean that there is an issue with the flow thermistor.


An F5 error code would usually indicate a problem with the return thermistor.


This can simply refer to an outside sensor failure.


F7 can indicate to a low mains voltage.


An unconfigured printed circuit board (PCB) is the issue in this case.


An L1 error code refers to flow temperature overheat or that there is no water flow.


This error code can also refer to flame loss.


This means 5 boiler resets in 15 minutes


L6 is for false flame lockout

Error Codes

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When is the best time to get a new boiler installation?

There’s not always a right time. However, if you’re planning on replacing yours before it completely packs up, then it is recommend that you do it during the summer months. Summer time is the best because you will be less reliant on heating and hot water so the process should be pain free.

How do I install a boiler in my house?

By enlisting the help of a Gas Safe registered heating engineer.

Can a plumber install a boiler?

Only if they are a Gas Safe registered heating engineer as well as a plumber.