Ideal Boiler Error Codes, Causes & How To Fix

James Elston
Written by James Elston
Updated on 17th May 2024
Posted on 15th May 2024
Ideal Boiler Error Codes, Causes & How To Fix

Ideal boilers error codes and faults – What they mean & how to fix

When your Ideal boiler isn’t working as it should, then you’re going to want a solution as quickly as possible.

ideal boiler error fault code

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Thankfully, there are some problems that you’ll be able to fix without needing to call in specialist help. But it’s also essential to know those problems which need to be left to the professionals. Maybe it’s not time for a brand new boiler just yet.

In this article we’ll first of all look at some of the causes of some most common problems. Then, we’ll provide you with a comprehensive list of all the error codes which you’re likely to see on your Ideal boiler.

Don’t forget as well to take a look at the manual for your boiler for extra information. If you can’t find your copy, you can download a copy from Ideal here.

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Common Ideal Boiler Error Codes & Faults

Just like most types of boilers, some boiler problems crop up more often than others, so we’ve focussed on the most common faults in this section.

For more help in working out what the issue might be, check out our troubleshooting guide to when your boiler’s not working.

How to fix an F1 error code

The Ideal boiler F1 error code is displayed on the control panel when your system has low water pressure.

This is a simple issue to fix yourself and just needs the water level topping up in the boiler. We’ve provided more guidance in our article on what to do when your boiler has a pressure that is too high or too low. You could also see the Ideal FD fault code but this can mean other issues too.

ideal boiler error fault code

How to fix an L2 fault code

The Ideal boiler L2 fault is displayed when the flame has gone out on your system. There are a number of different reasons as to why this might be happening, which include:

  • Reduced gas pressure
  • The flue becoming blocked
  • A gas valve becoming faulty
  • Faulty flue sensor

This then means that the boiler then goes into lockout mode to ensure your safety. As a result, you’ll then need to call out an engineer who can establish the reason for the fault, carry out the repair and then reset the boiler for you. This was a very common fault on the old Ideal Isar boiler.

To avoid the stress of unexpected repair bills, boiler cover can be a great way of ensuring that you can get repairs done without big bills.

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How to fix an F2 fault code

The Ideal boiler F2 error code is also displayed when the flame has gone out. So, just as with the Ideal Logic L2 fault code, this is going to mean that your boiler has gone into lockout. It will now need to be seen by a qualified gas technician to get everything up and running again.

How to fix an L9 fault code

The Ideal Logic L9  error code means a problem with the printed circuit board (PCB).  This might mean that it’s no longer configured correctly to operate the boiler, or it might have developed a fault. Unfortunately, either way, it’s going to need the visit of a gas technician to sort out the problem.

All Ideal Boiler Error Codes

Ideal Boiler Error CodeProblem
L1Lockout due to the flow temperature or overheat temperature
L2Lockout due to flame being extinguished
LCSeveral resets within 15 minutes. Turn the boiler off to resolve
L6Boiler detects a flame when no hot water/heating demand
F1Water pressure too low to function
F2, FN or LNFlame has gone out
F3Problem with the fan
L4 or F4Fault with the thermistor
L5 or F5Fault with the return thermistor
F6Fault with the outside sensor
F7Low levels of power to the system, so contact electricity provider.
F9, L9, F8 or L8Printed circuit board (PCB) unconfigured or fault
FUPotential problems with the isolation valves
FDNo Water Flow

Some of the codes that show up on the control panel of your Ideal boiler are just to show what’s happening rather than indicating a problem. Phew, no replacement boiler for these ones…

Display CodeMeaning
Status 0In standby mode with the boiler waiting for either a demand for hot water or heating.
Status CCentral heating mode is active
Status DHot water mode is active
Status FFrost mode is active

Popular Ideal boiler models these error codes show up on

ideal has a range of boilers but their error codes are pretty standard accross the ranges. Here are some of the most popular boilers in the UK that are will have these issues:

Ideal error codes and faults summary

ideal boilers fault codes

Thankfully some issues, such as the Ideal Logic F1 code, can be fixed by the homeowner. This then means that you’ll soon, once again, have hot water and heating.

If, however, you find yourself on first name terms with your local Gas Safe heating engineer, and there’s more time without hot water than there is with it working, then now may be the time to consider looking at replacement boilers.

Even the best combi boilers and best system boilers have their off days.

Boiler Central provide a free personalised recommendation service. Simply enter your requirements, and you’ll be presented with a range of boiler quotes that are perfect for your needs. And the best part?

All quotes on our online boiler deals are fixed price, so that means that you’ll know exactly how much you’ll need to budget for the boiler and the complete installation!

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Written by
James Elston
James Elston Director Of Boiler Central
Posted on: 15th 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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