What does the Baxi Megaflo E410 fault code mean?
The E410 fault code on a Baxi Megaflo indicates a problem with the domestic hot water (DHW) flow rate. This typically means that the boiler is unable to provide the expected flow of hot water, which can affect the performance of your heating system.
Common Causes
- Blocked Heat Exchanger: A buildup of limescale or debris can restrict water flow, leading to inadequate hot water supply.
- Faulty Flow Sensor: If the flow sensor is malfunctioning, it may not accurately detect the water flow, causing the boiler to trigger the fault code.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer for any issues related to gas or electrical components. However, you can check for blockages in the system and ensure that the water pressure is within the recommended range.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for resolving the E410 fault could range from £150 to £300, depending on whether a flow sensor replacement or heat exchanger cleaning is required. This estimate includes parts and labour costs typical for such repairs.