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Vaillant Boiler Error Codes: A Comprehensive Guide on How to Fix Common Issues for Optimal Home Heating


Vaillant Boiler Error Codes: Troubleshooting Guide

Vaillant boilers are known for reliability, but occasional issues can arise. Understanding Vaillant boiler error codes is vital for efficient troubleshooting and keeping your home warm. This guide explores common Vaillant error codes, offering actionable steps for resolution. Whether it’s F.22(f.22), F.75(f.75), F.28(f.28) low water pressure or F.61(f.61) gas valve faults, find expert solutions here.

Understanding Vaillant Boiler Error Codes:

  1. Error Code F.22 – Low Water Pressure:
    • Explanation: Low water pressure is signaled by this code, impacting boiler performance.
    • How to Fix: Check for leaks in the system, re pressurize the boiler following the manufacturer’s guidelines, and reset the error code.
  2. Error Code F.28 – No Ignition:
    • Explanation: The boiler failed to ignite, possibly due to a gas supply issue.
    • How to Fix: Ensure gas supply is on, check for any obstructions in the gas line, and reset the boiler.
  3. Error Code F.75 – Boiler Overheating:
    • Explanation: The boiler has exceeded safe temperatures, leading to potential damage.
    • How to Fix: Check for closed radiator valves, bleed radiators to release air, and reset the boiler. If the issue persists, seek professional assistance.
  4. Error Code F.27 – Flame Loss:
    • Explanation: The boiler detected a loss of flame during operation, causing disruption.
    • How to Fix: Inspect the gas supply, reset the boiler, and monitor for consistent flame presence. If the problem persists, consult a qualified technician.
  5. Error Code F.61 – Gas Valve Fault:
    • Explanation: A fault in the gas valve is preventing proper gas flow, impacting boiler functionality.
    • How to Fix: Check for obstructions in the gas line, ensure the gas valve is operational, and reset the boiler.

How to Fix Boiler Fault Codes: DIY Solutions:

  1. Check Your Manual:
    • Your boiler manual is essential. Learn code interpretation and model-specific troubleshooting tips.
  2. Resetting the Boiler:
    • A simple reset may solve issues. Follow the correct procedure for your boiler.
  3. Inspecting External Factors:
    • External factors like frozen pipes trigger codes. We guide you through visual inspections.
  4. Contacting a Professional:
    • When DIY fails, know when to call experts. Guidance on seeking professional help is provided.


Empower yourself to address Vaillant boiler error codes. Whether a DIY enthusiast or seeking professional help, this guide ensures a warm and comfortable home. Regular maintenance, prompt troubleshooting, and understanding error codes are keys to uninterrupted heating.

Closing Note:

For persistent issues or uncertainties, consult a certified technician. Safety first, and here’s to a smoothly operating boiler!