Intergas Boiler Error Codes, Cause & How To Fix

James Elston
Written by James Elston
Updated on 17th May 2024
Posted on 16th May 2024
Intergas Boiler Error Codes, Cause & How To Fix

Intergas boiler error codes and faults – What they mean & how to fix

intergas boiler error codes

Boiler problems can seem like a nightmare, but you can quickly work out what the problem is when you know where to look. That’s because Intergas boiler problems can be diagnosed by looking at the display panel and making a note of the error code being displayed.

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Then we’ve made life easy for you by providing you with all the information you need to know whether you can complete the fix yourself or whether you’ll need the help of an engineer.

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Common Intergas Boiler Error Codes & Faults

Some boiler problems are more common than others, so we’re going to focus on those within this section. If you can’t see the code here that’s displayed on your boiler, then do check out our complete list of error codes in the table at the end of this article. If the problem is too bad to fix, we can also provide you with an online quote for a new boiler.

How to fix boiler error code 4

When you get the Intergas boiler fault code 4, it means that the printed circuit board isn’t able to recognise the presence of a flame signal.

The most likely cause of this is that the flame sensor needs to be replaced. But before you call out an engineer, do check that the gas tap is turned to the on position. If it’s been accidentally turned off, then that will be why there is no flame. No need to worry about what a new boiler cost just yet.

intergas boiler error codes

Now usually, when you get this error code, your Intergas boiler will go into locked mode. This is to prevent the boiler from operating when there might be safety issues. If you’re not sure how to reset the boiler, check your Intergas combi boiler manual for instructions. Not sure where the manual is? You can download a new copy here.

Other causes of an error code 4 include:

  • Faulty gas valve
  • Problem with the burner
  • A fault within the PCB

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How to fix boiler error code 9

If you have an Intergas boiler error code 9, this tells you that there is an internal fault with the burner controller. Unfortunately, it’s then likely to mean that the part will need to be replaced, meaning a call out for an engineer.

If you have boiler cover, then you’ll be able to give the service centre a ring, and they’ll arrange for someone to come out and get your boiler up and running again.

How to fix boiler error code 11

The Intergas boiler error code 11 means that there is a damaged S1 sensor or that there is a circulation fault. An engineer will need to check the wiring to diagnose the fault and then replace any faulty parts.

All Intergas Boiler Error Codes

So, here’s the complete list of error codes for you. As you can see, some codes look as if they cause the same fault but do be aware the way they have become faulty can differ, and that’s where your registered gas safe engineer comes in.

Error CodeFault
10, 11, 12, 13, 14S1 sensor fault
20, 21, 22, 23, 24S2 sensor fault
0.0System pressure too low
0Faulty sensor
1High temperature
2Interchanged sensors S1 and S2
4Flame signal not being received
5The flame signal is poor
6Faulty flame detection
8Problems with the fan speed
27Outside sensor temperature has short-circuited
29, 30Faulty gas valve relay

If you have an Intergas Extreme or Exclusive boiler, the error codes are a bit different:

Error CodeFault
F000Replacement Heat Exchange sensor required
F001High Temperature when central heating is on
F002High Temperature when hot water is on
F003High flue gas temperature
F004No flame at start-up
F005The flame goes out during operation
F006Flame error
F007Poor ionisation flow
F008Incorrect fan speed
F009Fault with burner controller
F010, F011Faulty sensor
F012Faulty sensor 5
F014Fault with mounting sensor
F015Fault with S1 sensor
F016Fault with S3 sensor
F018Blocked flue and/or air supply duct
F019Faulty BMM
F027Outdoor sensor short-circuited
F028Error with reset
F029Faulty gas valve
FO30Faulty S3 sensor
F031Fault S1 sensor


Knowing what the error codes mean on your Intergas boiler means that you can quickly establish what the problem might be. Then, fingers crossed, it won’t be long before you have hot water and a lovely warm home.

See our other boiler error and problem pages for similar budget boilers Biasi problems, Ferroli Problems, and Warmflow problems now to get the help you need.

If the problem turns out to be more significant, you might find yourself needing a new boiler. Using a fixed price boiler quotation service means there’s no need to worry about unexpected bills; the price you see is the price you pay! We have some fantastic boiler deals on some of the best combi boilers, system boilers, and regular boilers all online.

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Written by
James Elston
James Elston Director Of Boiler Central
Posted on: 16th May 2024

James Elston is our resident boiler replacement and heating expert here at Boiler Central. With over 20 years experience in the boiler installation industry, James ensures that he knows everything there is about our Gas Safe boiler installations, energy saving and home heating solutions. This can be from simply procuring the latest best combi boilers, to reviewing and ensuring that Boiler Central maintains the highest standards across our boiler installation company.

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