How to fix Baxi Megaflo fault code E350

What does the Baxi Megaflo E350 fault code mean?

The E350 fault code on a Baxi Megaflo indicates that a gas leak has been detected within the system. This is a critical safety issue that requires immediate attention to prevent potential hazards.

Common Causes

  • Loose Connections: Gas pipes or fittings may be improperly secured, leading to leaks.
  • Damaged Components: Wear and tear on gas valves or seals can result in gas escaping from the system.

Can I fix it myself? (DIY)

It is strongly advised to call a Gas Safe Engineer to address this issue, as handling gas leaks poses serious safety risks. Do not attempt to repair gas-related problems without professional assistance.

Estimated Repair Cost (2026 UK Prices)

The estimated repair cost for resolving a gas leak detected by the E350 fault code is approximately £150 to £300. This includes the cost of a Gas Safe Engineer’s visit and any necessary parts replacement.