Vaillant F22 Fault Code

What is the Vaillant F22 Fault?

The Vaillant F22 fault is a specific error code indicating low water pressure within the boiler of your central heating system.

The F22 Error signals that your Vaillant boiler pressure has dropped significantly.

Reasons for boiler pressure loss include water leaks or bleeding radiators in the central heating system.

This fault is particularly common in Vaillant boilers but can be found in other boilers as well.

F22 error code displayed on Vaillant boiler

Common Causes of the Vaillant F22 Fault Code

Causes of the F22 fault code in your Vaillant boiler include:

Leaks in the Heating System

Pinhole leaks or loose connections in pipes or radiators lead to gradual water loss causing a drop in water pressure.

Recently Bled Radiators

Releasing air from radiators by bleeding them can reduce pressure in the central heating system causing an F22 error.

Faulty Pressure Sensor

A malfunctioning pressure sensor in your Vaillant boiler might falsely trigger the F22 fault code.

Degraded Boiler Components

Over time, wear and tear can affect the boiler’s efficiency, leading to issues with boiler including the F22 error code.

Signs & Symptoms of Vaillant F22 Fault Code

Issues associated with your boiler losing pressure and displaying F22 include:

  • The boiler shutting down or failing to ignite, indicating a problem with water pressure.
  • No hot water or heating despite the system being active, a common problem in central heating systems.
  • The pressure gauge on the boiler displays a pressure reading below the recommended level of 1.5 bar.
  • The persistent appearance of the F22 error code on the Vaillant boiler display.

Fixing The Vaillant F22 Fault

To resolve the F22 fault code in your Vaillant boiler:

  1. Repressurize the Boiler: Follow the manufacturer’s guide to safely increase the water pressure back to the recommended level in your Vaillant boiler.
  2. Inspect for Leaks: Check the central heating system for any signs of dripping or wetness around pipes, radiators, and valves.
  3. Consult a competent leak detection specialist: Here at ADI Leak Detection we are specialists at detecting hidden water leaks in heating systems which lead to error codes such as the F22 code.

Vaillant F22 FAQs

The cost varies based on the underlying cause in your Vaillant boiler. Simple fixes like repressurising might be free if you do it yourself, while professional repairs for leaks or part replacements in your boiler or central heating system can range significantly depending on severity and labor.

Preventive measures include regular boiler maintenance, finding and fixing leaks, and ensuring the system operates within the recommended pressure range.

Annual servicing by a Gas Safe registered engineer can also help identify potential issues in your Vaillant boiler or central heating system before they trigger the F22 fault code.

Regular checks of your boiler’s pressure gauge and heating system can also be beneficial.

When To Call ADI Leak Detection To Help With Your Vaillant F22 Error Code

If topping up the pressure in your boiler clears the F22 error code but it reappears soon after then you have a leak on your central heating system.

If there are no visible signs of a leak on your heating system pipework, radiators or boiler then its time to call a leak detection professional.

ADI Leak Detection are CIPHE (Chartered Institute of Plumbing and Heating Engineering), WIAPS (Water Industry Approved Plumbers’ Scheme) and Watersafe accredited so you can trust the service you will receive.

Call us today on 0800 731 3843 and see how we can help you with your F22 fault.

ADI Leak Detection Customer Service Office Team

Adrian Morgan

Adrian Morgan CIPHE RP RHP is the founder & Managing Director of ADI Pro Leak Ltd. Adrian is also the Head Plumbing, Heating & Leak Detection engineer at ADI Leak Detection.

Adrian CIPHE RP RHP is proud to be registered with the Chartered Institute of Plumbing & Heating Engineering, a Registered Plumber and a Registered Heating Professional.