How to fix Baxi Megaflo fault code E190

What does the Baxi Megaflo E190 fault code mean?

The E190 fault code on a Baxi Megaflo indicates a communication error between the boiler’s control board and other components. This issue can prevent the boiler from operating correctly and may require troubleshooting to identify the source of the communication failure.

Common Causes

  • Wiring Issues: Damaged or loose wiring connections can disrupt communication between components.
  • Faulty Control Board: A malfunctioning control board may fail to send or receive signals properly, leading to the E190 error.

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 complications or safety hazards.

Estimated Repair Cost (2026 UK Prices)

The estimated repair cost for resolving the E190 fault could range from £150 to £300, primarily depending on whether wiring repairs or a control board replacement is needed. The control board replacement is typically the more expensive part of the repair.