What does the Baxi Megaflo E620 fault code mean?
The E620 fault code on a Baxi Megaflo indicates a central heating (CH) system fault has been detected. This typically suggests issues with the boiler’s ability to communicate with the heating system or a malfunction within the system itself.
Common Causes
- Low Water Pressure: Insufficient water pressure can prevent the heating system from functioning correctly, triggering the fault code.
- Faulty Sensors: Malfunctioning temperature or pressure sensors may send incorrect readings to the boiler, causing it to display the E620 error.
Can I fix it myself? (DIY)
If you are comfortable, check the water pressure on the boiler and ensure it is within the recommended range (usually between 1-1.5 bar). If the pressure is low, you can top it up using the filling loop. However, for any gas or electrical issues, it is crucial to call a qualified Gas Safe Engineer.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for addressing the E620 fault could range from £150 to £300, depending on whether it involves sensor replacement or other components. This estimate reflects the cost of parts and labour for a qualified engineer to diagnose and rectify the issue.