How to fix Vaillant ecoTEC pro fault code F95

What does the Vaillant ecoTEC pro F95 fault code mean?

The F95 fault code indicates that there are faulty system calibrations within the Vaillant ecoTEC pro boiler. This can affect the boiler’s ability to operate efficiently and may lead to further issues if not addressed promptly.

Common Causes

  • Incorrect Sensor Readings: Faulty temperature or pressure sensors can lead to incorrect calibrations, causing the F95 error.
  • Software Issues: Outdated or corrupted software in the boiler’s control system can result in calibration errors.

Can I fix it myself? (DIY)

It is recommended to call a Gas Safe Engineer to diagnose and fix this issue, as it may involve complex electrical or gas components that require professional expertise.

Estimated Repair Cost (2026 UK Prices)

The estimated repair cost for resolving the F95 fault could be around £150 to £250, primarily due to potential sensor replacements or software updates that may be required.