What does the Vaillant ecoTEC plus F87 fault code mean?
The F87 fault code on a Vaillant ecoTEC plus boiler indicates a problem with the system installation, which may involve incorrect pipework or inadequate system pressure. This fault typically requires professional assessment to ensure safe and effective operation.
Common Causes
- Incorrect Pipework Configuration: If the boiler is not connected correctly to the heating system, it can lead to operational issues.
- Insufficient System Pressure: Low water pressure in the system can trigger the F87 fault, indicating a need for adjustment or repair.
Can I fix it myself? (DIY)
It is highly recommended to call a Gas Safe Engineer to diagnose and resolve this issue, as improper handling can lead to safety hazards.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for addressing the F87 fault could range from £150 to £300, depending on whether it involves reconfiguring pipework or adjusting system pressure, as both tasks require professional expertise.