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Ideal F1 Fault Code: Causes & How To Fix

Ideal F1 error code – how to fix it & what it means

Ideal is one of the top boiler companies in the UK, selling some of the best heating appliances on the market. However, like all boilers, there can be problems with them meaning they will display fault codes, much like the Ideal F1 fault code.

ideal heating

If an F1 fault code were to appear on your Ideal boiler, it means that your boiler pressure is too low and needs to be back in the recommended range. Don’t worry though, you won’t need a new boiler just yet, as there are some easy fixes for this situation.

In a lot of cases with error codes, the best thing to do is to call a Gas-Safe engineer to come to your property and service your boiler. This way, you know your boiler is in good hands and you won’t have to worry about constant breakdowns.

Fill in the form below to get a Gas-Safe registered engineer to service your Ideal boiler

How to fix an Ideal F1 fault code

To get this fixed, you will have to repressurise your boiler so that the pressure is in the suggested range, getting rid of the issues your boiler is having. Calling a professional engineer to do this is also a solution if you aren’t feeling very confident in using tools to repair this fault code.


If your Ideal boiler is experiencing problems with low pressure, you will probably be able to tell any time you want to use your central heating system. When using your shower, it will likely struggle to release the water quickly and your hot water demand won’t be met.

To repressurise your boiler, you will need to go to your boiler filling loop to top up the pressure, making sure it is between 1-1.5 bars on the pressure gauge. A filling loop is a braided hose located at the bottom of your boiler and connects the mains cold water supply to your boiler. Here we will go through the process:

  1. Firstly, turn your boiler off and find your external filling loop underneath your boiler.
  2. Then open both valves on the filling loop so the mains water travels through it.
  3. Wait for the boiler’s pressure to increase on your boiler’s pressure gauge, making sure it falls between 1-1.5 bars. Make sure this doesn’t go above this range as that can also cause issues for your Ideal boiler.
  4. Once this is done, close the valves on the filling loop and reset your boiler to get it back up and running again.

What an Ideal F1 fault means

As we have already stated, seeing the Ideal boiler F1 fault means that you have low boiler pressure that needs to be topped up. However, sometimes it’s not as easy as just increasing boiler pressure, as there can also be other causes for it which require a bit more work.

They may even call for a heating engineer to come and repair it if it is a more serious problem. Here we will go through some of the different causes of the F1 boiler fault code and tell you what you should do about it.

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Causes for Ideal F1 error code

Central heating system leaking

An alternative to why your boiler loses pressure is that there may be a hidden water leak somewhere in your heating system. Make sure you look thoroughly throughout the whole system as even the smallest leak can cause low water pressure in your Ideal boiler.

boiler leaking water

Getting this fixed will be quite a bit more complicated meaning you will likely need a boiler engineer to come to your property and fix this. Doing this is much better than attempting to do it yourself as a Gas-Safe engineer will have the tools and experience to fix this whilst trying to repair it yourself may cause further damage to the boiler or harm you.

The most common places you will find a potential leak are usually towel rails, radiators, your boiler’s pump and heat exchanger, and copper pipework. With these being the most common internal components for a leak, your boiler engineer will check your whole central heating system, especially these areas for a leak.

Testing pressure sensor

Even if your pressure gauge displays the water pressure as between 1-1.5 bars, there is a chance that your pressure sensor is faulty and the readings displayed are inaccurate. Your faulty sensor will send false signals to your PCB, which will make it act like your pressure is fine when, in reality, it could be out of the recommended range.

If this is the case, you will again probably have to call a Gas-Safe engineer to service your boiler and examine your pressure sensor.

Chances are if your water sensor is broken or faulty, it will be much easier to buy a replacement for it rather than trying to fix your current one. However, don’t worry about high costs, as pressure sensors are usually quite cheap for a boiler part, so taking this action will allow your boiler to run effectively.

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Low water pressure & heating system

We’ve already been through what you need to do when you need to increase boiler pressure on your Ideal boiler but making sure you know what you’re doing is important. A Gas-Safe registered engineer will be able to do any of this for you if you don’t want to take a risk in doing it yourself.

repressurising a boiler

A service charge for the engineer’s time is necessary but can be well worth it to get an efficient heating system. It will also likely cost less than constant repairs for your boiler due to it being in bad shape.

When your boiler has lost pressure, this can cause your boiler to lock out meaning it will perform an emergency shutdown as a preventative measure for any more damage. Usually, if the boiler pressure was to fall below 0.5 bars, this would trigger the boiler lockout.

Bleeding your radiators

Bleeding radiators is also associated with high and low pressure in your Ideal boiler, as your central heating system can sometimes fill up with trapped air. This air can then stop heat from flowing through your system properly, and tamper with your boiler pressure.

bleeding a radiator

To bleed your radiator, you will need a radiator bleed key or a screwdriver to loosen the bleed valve. When you’ve done this, you should hear the air being released which should mean heating will flow through the system much more effectively now.

This means you aren’t paying your heating bills only for you to not get as much energy and boiler efficiency as you normally would.

Ideal boiler service cost

Getting Ideal boiler service is perhaps the best way to keep your boiler running as efficiently as it possibly can. Most modern boilers will have a lifespan of about 10-15 years, so you will want to get the absolute most from the money you have spent on it.

boiler service

Boiler service will help keep the components of your boiler clean and in the best condition they can be, as you will have a Gas-Safe engineer there to make sure of it. Servicing should be done at least once a year and, in a lot of cases, is necessary to keep your Ideal warranty valid for your boiler.

The average cost of a boiler service is usually between £80-£125, which can change depending on a few different factors. These include the type of boiler you have, its size, the model and how old it is, as newer and bigger boilers usually cost more to service.

Although this may seem like quite a bit to pay in one go for a service, it will actually end up saving you money in the long run. It will likely end up being cheaper than having your boiler constantly break down and in need of repair, so getting annual service is very financially beneficial.

Ideal boilers for fixed prices

If your Ideal boiler is constantly breaking down and displaying a common fault code, this might be a sign that you need to get a quote for a replacement boiler.

Getting a new boiler will get rid of all the constant annoying issues your boiler might be having and may even be better financially long term.

Find out more about brand-new boiler quotes online to get an Ideal boiler.

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