What does the Vaillant ecoTEC exclusive F72 fault code mean?
The F72 fault code on the Vaillant ecoTEC exclusive indicates a system lockout due to a fault in the heating system. This typically occurs when the boiler detects an issue that prevents it from operating safely.
Common Causes
- Low Water Pressure: Insufficient water pressure can trigger a lockout as the boiler requires a minimum pressure to function correctly.
- Faulty Sensor: A malfunctioning temperature or pressure sensor may provide incorrect readings, leading to a system lockout.
Can I fix it myself? (DIY)
If the issue is low water pressure, you can attempt to repressurise the system by using the filling loop. However, for any electrical or gas-related issues, it is crucial to call a Gas Safe Engineer to ensure safety and compliance with regulations.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for addressing the F72 fault could range from £150 to £300, depending on whether it involves a simple pressure adjustment or the replacement of a faulty sensor, which can be more expensive.