What does the Baxi Megaflo E470 fault code mean?
The E470 fault code on a Baxi Megaflo indicates a problem with the domestic hot water (DHW) supply temperature. This typically means that the temperature of the water being supplied is either too low or too high, which can affect the performance of the boiler.
Common Causes
- Faulty Temperature Sensor: The temperature sensor may be malfunctioning, leading to incorrect readings and triggering the fault code.
- Blocked Heat Exchanger: A blockage in the heat exchanger can prevent proper heating of the water, resulting in temperature inconsistencies.
Can I fix it myself? (DIY)
It is advisable to call a Gas Safe Engineer for this issue, as it involves gas and electrical components that require professional handling. Attempting DIY repairs could be dangerous.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for addressing the E470 fault could be around £150 to £250, primarily for replacing the temperature sensor or cleaning the heat exchanger, depending on the specific issue identified by the engineer.