What does the Baxi Megaflo E670 fault code mean?
The E670 fault code on a Baxi Megaflo indicates a calibration issue within the domestic hot water (DHW) system. This typically means that the boiler is unable to accurately measure or control the temperature of the hot water being produced.
Common Causes
- Sensor Malfunction: A faulty temperature sensor may provide incorrect readings, leading to calibration errors.
- Wiring Issues: Damaged or loose wiring connections can disrupt communication between components, affecting system calibration.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer to diagnose and repair this issue, as it may involve gas or electrical components that require professional handling.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for resolving the E670 fault could be around £150 to £250, primarily due to the potential need for replacing sensors or repairing wiring, which can be labour-intensive.