What does the Viessmann Vitodens 111-W F69 fault code mean?
The F69 fault code on the Viessmann Vitodens 111-W indicates a problem with the heating circuit flow rate, which may result from insufficient water flow through the system. This can lead to inadequate heating performance and potential damage to the boiler if not addressed promptly.
Common Causes
- Blocked Filters: Dirt or debris in the system can obstruct water flow, causing the flow rate to drop below acceptable levels.
- Pump Failure: A malfunctioning circulation pump may not be able to maintain the necessary flow rate, leading to heating issues.
Can I fix it myself? (DIY)
If you are comfortable with basic plumbing, you can check and clean the filters or bleed radiators to ensure proper flow. However, for any gas or electrical issues, it is crucial to call a qualified Gas Safe Engineer to avoid safety risks.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for addressing the F69 fault could range from £150 to £300, depending on whether a pump replacement or filter cleaning is required. This estimate includes parts and labour for a qualified technician.