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Everything you need to know about boiler error codes

Let’s face it: there’s never a good time for a boiler to break down. Whether it’s in the middle of winter and you’re suddenly without heating, or mid-summer and you’ve got no hot water to shower or wash up with, a boiler fault is a pain you could do without.

Thankfully, your boiler’s error code can go a long way to helping you identify what’s wrong – and what to do about it. 

What does my boiler error code mean? Read on to find out! 

What are boiler error codes?

They are codes that appear on the digital display on the front of a boiler or are sometimes shown by flashing light sequences. The code or light sequence is a label to identify what the problem is. 

Your boiler error code will help you know whether you can fix the boiler yourself – usually by pressing buttons or turning dials on the boiler – or whether you need a qualified boiler engineer to carry out a repair. 

If you need an engineer, telling them the error code will help them identify the likely fault. That means they can know which spare parts you are likely to need and repair the boiler as quickly as possible. And who wouldn’t want that?

Are all boiler error codes the same?

No. Each manufacturer uses different codes. They can even differ across boiler models, from regular to system to combi boilers.

We have put a list of boiler faults codes together for you, by manufacturer.

Ideal Boilers

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Read more about Ideal Boiler Error Codes

Keston Boilers

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Read more about Keston Boiler Error Codes

Vokera Boilers

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Read more about Vokera Boiler Error Codes

Viessmann Boilers

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Read more about Viessmann Boiler Error Codes

Vaillant Boilers

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Read more about Vaillant Boiler Error Codes

Worcester Bosch Boilers

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Read more about Worcester Bosch Boiler Error Codes

Main Boilers

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Read more about Main Boiler Error Codes

What shall I do if I see an error code

First, look on our boiler error code guides to try and find your code and what it means. If you have your boiler manual to hand, you can look in that, too. 

Next, consider whether the problem is something you understand and can fix yourself. If you’re at all unsure, seek help from a qualified heating engineer. 

Under no circumstances should you remove the boiler case yourself.

Can anybody fix a boiler if they the error code?

No. The boiler case should never be removed by an unqualified individual. And if the error code doesn’t make sense to you, it’s time to call on a Gas Safe engineer. 

The engineer might not need to visit you – a video call could be enough for an experienced set of eyes and ears to ascertain what is causing the problem. Failing that, hands-on skills will be required.

Can I repair some boiler problems following an error code?

Yes, absolutely! There are several error codes that identify problems you should be able to fix yourself. 

For example, there’s an error code that shows that the gas flow to the boiler was interrupted. If your credit on your gas meter has run out and caused this, you would just need to top up the credit and then reset the boiler. 

Another example is low internal water pressure on the boiler. This is something all homeowners should be able to rectify.

How much will a repair cost if I see an error code?

The price can vary greatly. Traditionally, you would need to call out a heating engineer to diagnose the fault, and from there you will be given a price for a repair, including the parts. This first visit is always chargeable as you’re paying for the engineer’s time and knowledge to diagnose the fault. 

Sometimes they will have the part in their van, although not always because there are so many boiler makes and models. In that case, they would go away to source the part and come back, either immediately or another day, with the part for the repair. This means you’ll likely run into a second hours labour charge and maybe a second call out charge, depending on the company. 

It’s always best to clarify all costs before committing to a company attending. Some repairs take 10 minutes, while others can take as long as 3 or 4 hours. Labour rates vary from £60-200 per hour depending on your location and the time of day. 

And that’s not all: parts can range from £10-400. You’ll also need to check whether VAT will be added to your invoice. 

Can all boilers be repaired when an error code appears?

Unfortunately not. Some boiler parts are obsolete due to the age of the boiler and manufacturing of parts being discontinued. A heating engineer can find out from the boiler model if the parts are obsolete.

Is it worth repairing my boiler if I see an error code?

Not always. If a repair is going to cost hundreds of pounds and the boiler is around the 10-year mark, you would be sensible to weigh up the option of repair against the cost of having a new boiler installed. It’s a tough decision, but now that new boilers can come with 12-year manufacturer guarantees, it’s worth considering a replacement. 

A heating engineer can help you with the technical details and with making these decisions.

How can I save money if I see an error code?

You can save money by undertaking the first engineer ‘visit’ via video call. A virtual callout can be held via your phone, laptop or tablet, enabling a qualified engineer to see the issue and diagnose it. This saves on the costs of a traditional, on-site callout.  

Following the video call, you may have fixed the problem yourself, at a fraction of the usual costs, or diagnosed the fault, so the engineer can know what parts to bring with them. This saves both time and money. 

In the worst-case scenario, if the parts are obsolete and the advice is to get a new boiler, then you’ve still saved money by avoiding an engineer telling you this face to face and charging you for doing so. 

How do I book a video call?

You can book a 15-minute call to take place immediately, for only £15 at Herofix.com. Book now to access one of our qualified heating engineers and help diagnose your boiler fault.