Ideal F1 Error / Fault Code Explained

Ideal F1 Error / Fault Code Explained


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The Ideal boiler F1 error code is a common fault, displayed when the unit is low on water pressure. Luckily, this can be fairly simple to resolve yourself.

It’s worth noting that the Ideal Logic range of boilers have a flashing F1 error code showing an ‘F’ followed by a ‘1’, this is the same error code.

This is how Ideal define the F1 error code:

Ideal Boiler Error Code Meaning
F1 Low water pressure

While you can fix the Ideal boilers F1 error code yourself, the quickest and safest way is to hire a Gas Safe engineer. You can get free quotes from up to 3 qualified heating engineers in your area using Boiler Guide.

Watch: Ideal F1 Fault Code Explained

F1 Fault Code Causes

Over time, the pressure on the boiler is likely to drop but common reasons for a sudden drop include:

  • Water leaking from the boiler, pipes or radiators
  • Recently bleeding the radiators
  • If there is a leak somewhere in the system, you should never attempt to repair it yourself. Always hire a Gas Safe engineer to repair a leak anywhere around your heating system to fix the Ideal F1 error code. Complete our simple online form and you’ll get free quotes from up to 3 fully-qualified Gas Safe engineers in your area today. You can then compare the quotes and choose which one suits you the most, or not, there’s absolutely no-obligation.


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    How to Fix the Ideal F1 Error Code

    Ideal F1 Fault Code

    To resolve the F1 error code, you should start out by taking a look at the pressure gauge to find out just how low it is. On Ideal Logic range of boilers, you can find the built-in pressure gauge under the unit to the left hand side. When taking the reading, your boiler should have a pressure somewhere between 1 and 2 but the F1 error code means that it’s likely to be below 1.

    To resolve the issue, Ideal recommend:

    • Turning the boiler off
    • Waiting for the system to cool down
    • Repressurising the system to 1.0 bar
    • Bleeding the radiators

    You can increase the boiler pressure yourself but don’t hesitate to contact a qualified engineer if you’d rather a professional carry out the work.

    Repressurising an Ideal Boiler

    Before repressurising your Ideal boiler, you should turn the unit off and give it plenty of time to cool down. Once the system has cooled, you can increase the pressure by following these simple steps:

    1. Find the filling loop, which is a metal hose that has 2 valves – 1 at each end.
    2. Once located, the filling loop need to be attached to your system. It’s important to ensure that it’s tightly secured before going any further, you may need to remove end caps from the pipes.
    3. When it’s as secure as possible, open the valves on the filling loop which will allow water from the mains to travel into the heating system. Listen out for water flowing into the boiler, if you don’t hear anything then something isn’t right.
    4. As the water flows into the system, the pressure should begin to increase. Keep your eye on the pressure gauge until it gets to the 1 mark – stop at this point otherwise your system will over-pressurise.
    5. To stop the flow of water, turn the valves back to their original position.
    6. Release the filling loop. Some water will drop out of the loop but if it’s continuously flowing then you’ll need to tighten up the valves.
    7. Replace the end caps removed from the pipes.

    ALWAYS consult the manual that came with your Ideal boiler before looking to repressurise your boiler.

    Should you not feel confident repressurising your Ideal boiler yourself, then don’t hesitate to contact a Gas Safe registered engineer who will be able to safely and competently get your boiler to the correct pressure.

    It’s a good idea to keep an eye on the boiler pressure from time to time to keep on top of how the unit is performing.

    Other Ideal Boiler Fault Codes

    Another common error code on Ideal boilers is F2, which signals flame loss. You can find out how to resolve this issue on our guide to resolving the F2 Error Code.

    If you’re seeing a different fault code on your Ideal boiler then take a look through our comprehensive list of Ideal boiler error codes to find out what it means.


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