VAILLANT F22 FAULT CODE

Common Causes of the Vaillant F22 Fault Code

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

The F22 code commonly arises from one or more of the following system failures:

1. 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.

2. Recently Bled Radiators

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

3. Faulty Pressure Sensor

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

4. 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