What does the Viessmann Vitodens 050-W E274 fault code mean?
The E274 fault code indicates a problem with the system condensate trap, which is responsible for draining condensate produced during the boiler’s operation. A faulty trap can lead to water backing up in the system, potentially causing further issues.
Common Causes
- Clogged Condensate Trap: Debris or sludge may have accumulated in the trap, preventing proper drainage.
- Frozen Condensate Pipe: In colder weather, the condensate pipe may freeze, causing a blockage and triggering the fault code.
Can I fix it myself? (DIY)
It is advisable to call a Gas Safe Engineer to address this issue, as it involves working with the boiler’s condensate system, which can be complex and potentially hazardous.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for fixing the condensate trap is around £150 to £200. This includes the cost of parts and labour, as the trap may need cleaning or replacement by a qualified engineer.