What does the Vaillant ecoFIT pure F26 fault code mean?
The F26 fault code on the Vaillant ecoFIT pure indicates a malfunction with the temperature sensor, which is responsible for monitoring the water temperature within the system. This issue can lead to improper heating and may affect the overall performance of the boiler.
Common Causes
- Faulty Temperature Sensor: The sensor may be damaged or malfunctioning, leading to inaccurate temperature readings.
- Wiring Issues: Damaged or loose wiring connections to the temperature sensor can disrupt its functionality, causing the fault code to appear.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer for this issue, as it involves electrical components and safety risks. Attempting to fix it yourself could lead to further damage or safety hazards.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for replacing a faulty temperature sensor on a Vaillant ecoFIT pure is around £150 to £200. This includes the cost of the part and labour, as temperature sensors are relatively inexpensive but require professional installation.