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Vaillant F22 Boiler Fault – Useful Guide

F22 Boiler Fault

An F22 boiler fault error on a Vaillant Boiler can be associated with a common type water leak that we find regularly – central heating boiler leaks which can require some detailed water leak detection exploration, which thankfully we are very experienced at and equipped for.

Something that can often indicate you have a water leak is a loss of boiler pressure – for example an F22 boiler fault error on an Ecofit Pro combi boiler. In this useful guide we will help you to understand what does f22 mean on a Vaillant boiler.

What does F22 mean on a Vaillant boiler
What does F22 mean on a Vaillant boiler?

A boiler pressure leak is actually number three on our useful article on the signs of a water leak and an F22 boiler fault could be because of that.

Finding water leaks in the, what can be frequently hidden, pipework of a domestic or commercial central heating network is not something that is easy to do yourself, and plumbers are not necessarily best equipped for either. In fact, we get jobs sent to us from plumbers or heating engineers who believe a leak exists but are unable to locate exactly where the leak is.

Vaillant F22 Boiler Fault
Vaillant F22 Boiler Fault – Display

Please remember – various different models of boiler and different boiler manufacturers will have various error codes so check with your manufacturer or manual to find out what your code means. That said, this guide provides useful information relevant to various. If in doubt, feel free to contact us for help. Plus remember, on many occasions the F22 boiler fault code is often not directly to do with the boiler, it is in the network of pipes it is connected to, or other things associated with this.

Examples of where F22 Boiler Fault leaks could occur or manifest themselves in your home or business (which we have guides for) include some of the the following:

This guide, will look at F22 boiler fault codes in particular (although this also applies to similar codes on other different makes of boiler too, of which there are many) and what might cause the fault, which will appear on the boiler display panel, which might look something like this example on the left below.

Boiler Pressure F22 Fault
Boiler Pressure Gauge – F22 Fault Code

Additional information on this can be seen in our guide about you combi boiler leaking. On to more about what does f22 mean on a boiler, specifically f22 on Vaillant boilers.

What’s an F22 Boiler Fault Error Code?

To get the answer directly from the manufacturer, on the Vaillant website they have a Vaillant Fault Codes page, and for F22 boiler fault error codes they say “Safety switch-off: Low water pressure: No or insufficient water in the product, water pressure sensor defective – as you can see from their description, at the start they say ‘safety switch off’, so the boiler has a sensor switch which kicks-in as a safety measure if the boiler pressure drops below a certain level.

So let’s look at the other things it mentions one by one:

  • Low Water Pressure
  • No or Insufficient Water
  • Water Pressure Sensor Defective

Of the three, the third is a potential fault with the boiler and the first two could be problems in other parts of the network of pipes etc, linked to boiler pressure / a potential water leak in the central heating. On the topic of boiler pressure, you may be interested in our article about how a pressure relief valve works aka PRVs.

But how can you tell what the cause is? Well, if you’ve ruled out a problem with your actual boiler, by having a Gas Safe engineer inspect and evaluate it, or if you have other indicators of a leak (like pressure loss) then it’s possible a leak in the central heating network of pipes is causing the fault.

A water leak can cause pressurised boilers to lose that pressure (that they need to operate) and introduce air to the system, so if you are losing pressure quickly and having to top up your boiler and you have an F22 boiler fault code, get in touch with us and we will discuss this with you.

F22 Boiler Fault
F22 Boiler Fault Code Error

On the topic of F22 boiler faults. something that can be useful in various parts of the inspection process is the use of isolation valves, for a number of reasons, similarly we have a great article explaining central heating leak sealant.

We also have a tool that may help with an F22 boiler fault – Boiler Pressure Low? – Calculator

Find F22 Boiler Fault Leaks

As professional and experienced leak detection experts, we have both the right people, systems and leak detection equipment to ensure we can help to increase the chances of finding water leaks, not just for F22 boiler fault leaks – we can find many types of water leak in homes and businesses

We have written a detailed guide to trace and access leak detection recently which is well worth a read to understand the process from start to end. Here are some of the techniques we will use to find your water leak, during our leak detection investigations:

Do please remember, if you have Trace and Access cover on your home insurance, both the cost of finding and fixing the water leak could be paid for by your insurer. In fact, we can work with you and them to co-ordinate that process, and not just F22 Boiler Fault water leaks.

Gas Combi Boiler
Gas Combi Boiler – Design (simplified)

On top of this, unlike some other water leak detection providers, we’re water damage restoration experts which means that other than locating the leak, we’ll also help to assess and inspect the actual damage caused to your home or business by the leak. We can also help dry and restore your property after if you would like us to and will discuss that at the time if needed. logo logo

We have some similar guides to other boiler error messages including – F1 Boiler Faults, similarly an E119 Boiler Fault and also F75 Boiler Faults. Although these can be similar there may be some key differences too. Like we said earlier in this guide, always check the guidance from your manufacturer and get advice if needed.

How do you fix a Vaillant F22 boiler fault?

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Vaillant F22 boiler fault messages and errors may be linked to a water loss from your boiler or central heating system, which can include from a water leak in your heating pipes. Depending on what’s causing the pressure loss will inform the best remedy and repair. That could be a problem with the boiler itself, or a leak. If it is a leak then to resolve the F22 boiler fault error, you will need to find and fix the leak, otherwise pressure will continue to drop.

What does F22 mean on a boiler?

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Having an F22 message on your boiler can mean you have low or reduced water pressure in your central heating system. This low or dropped pressure can be caused by a fault with the boiler itself or, often it can be caused by a water leak within your central heating system pipes. If you have a leak, this can drain water from the system and cause the water pressure to drop resulting in an F22 boiler fault showing on your boiler gauge / display.