How to fix Vaillant ecoTEC pro fault code F62

What does the Vaillant ecoTEC pro F62 fault code mean?

The F62 fault code on a Vaillant ecoTEC pro boiler indicates a faulty system restart, which typically occurs when the boiler fails to restart after a shutdown. This can lead to heating and hot water supply issues, requiring attention to restore normal operation.

Common Causes

  • Electrical Faults: Issues with the boiler’s electrical components, such as the control board or wiring, can prevent proper restarts.
  • Sensor Malfunctions: Faulty temperature or pressure sensors may send incorrect signals, causing the boiler to fail during the restart process.

Can I fix it myself? (DIY)

While some basic troubleshooting can be attempted, such as checking the pressure gauge and ensuring it is within the recommended range, it is strongly advised to call a Gas Safe Engineer for any electrical or gas-related issues to ensure safety and compliance with regulations.

Estimated Repair Cost (2026 UK Prices)

The estimated repair cost for addressing the F62 fault could range from £150 to £300, depending on whether electrical components or sensors need replacement. This estimate includes parts and labour, reflecting the complexity of diagnosing and fixing electrical faults.