What does the Viessmann Vitodens 050-W E288 fault code mean?
The E288 fault code on the Viessmann Vitodens 050-W indicates a problem with the system aquastat, which is responsible for regulating the temperature of the water in the heating system. This fault can lead to inefficient heating or hot water supply issues.
Common Causes
- Faulty Aquastat Sensor: The sensor may be malfunctioning, causing incorrect temperature readings and triggering the fault code.
- Wiring Issues: Damaged or loose wiring connections to the aquastat can disrupt its functionality, leading to the E288 error.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer for this issue, as it involves gas and electrical components that can be dangerous if handled improperly. Attempting DIY repairs could void your warranty or lead to further complications.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for addressing the E288 fault code is around £150 to £250. This includes the cost of replacing the aquastat sensor and any necessary labour charges, which are reflective of the complexity of the repair.