What does the Viessmann Vitodens 050-W E298 fault code mean?
The E298 fault code indicates a problem with the system return sensor, which is responsible for monitoring the temperature of the water returning to the boiler. This fault can lead to inefficient heating and may cause the boiler to shut down to prevent damage.
Common Causes
- Faulty Sensor: The return sensor may be malfunctioning or damaged, leading to incorrect temperature readings.
- Wiring Issues: Damaged or loose wiring connections to the sensor can disrupt its function and trigger the fault code.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer to diagnose and repair this issue, as it involves electrical components and potential gas safety risks. Attempting to fix it yourself could lead to further complications.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for replacing the system return sensor is around £150 to £200. This includes the cost of the part and labour, reflecting the complexity of the repair and the need for a qualified technician.