Vaillant Boiler Fault Codes Kent

Vaillant Boiler Fault Codes Explained for Kent Homeowners

At Plumble, many of our Kent customers call us with Vaillant boiler issues. Understanding fault codes can help you spot problems early. In this guide, we’ll break down common Vaillant boiler fault codes for Kent homeowners and explain when to call in the professionals.

Table of Contents

• F22 – Low Water Pressure
• F28 – Ignition Failure
• F29 – Flame Loss
• F75 – Pump or Pressure Sensor Fault
• F62 – Gas Valve Fault
• When to Call Plumble in Kent

F22 – Low Water Pressure

Low water pressure is one of the most common Vaillant boiler faults seen in Kent homes. This often happens after bleeding radiators or due to small leaks. Your system pressure should normally sit between 1.0 and 1.5 bar. You may be able to top up pressure using the filling loop, but repeated low pressure suggests a leak or deeper issue.

F28 – Ignition Failure

F28 fault code means the boiler failed to ignite. In Kent homes, this could be caused by frozen condensate pipes (especially in winter), gas supply issues, or faulty ignition components. If your boiler won’t fire up, it’s time to call Plumble’s Gas Safe engineers.

F29 – Flame Loss

Similar to F28, the F29 code signals that the flame started but was lost. Causes include blocked flues, faulty gas valves, or draughts blowing out the flame in exposed Kent properties. Professional inspection is recommended.

F75 – Pump or Pressure Sensor Fault

F75 means your boiler isn’t detecting sufficient water pressure when the pump starts. It could be a faulty pump, airlock, or pressure sensor problem. This is a fault we regularly see in Kent households with older systems or poor water quality.

F62 – Gas Valve Fault

F62 signals a gas valve malfunction, often caused by a stuck valve or faulty PCB (Printed Circuit Board). This fault must be addressed by a qualified Gas Safe engineer. Never attempt to fix gas valve issues yourself.

When to Call Plumble in Kent

If you see any Vaillant boiler fault codes and aren’t sure how to proceed, contact Plumble. We serve homeowners across Kent, including Canterbury, Maidstone, Medway, and Folkestone. Our expert engineers can diagnose and repair all Vaillant boiler faults quickly and safely.

Don’t let a Vaillant boiler fault leave you without heating or hot water. Contact Plumble for fast repairs across Kent.