What does the Baxi Megaflo E820 fault code mean?
The E820 fault code on a Baxi Megaflo indicates a central heating (CH) system efficiency fault, suggesting that the boiler is not operating at optimal efficiency. This can lead to increased energy consumption and reduced heating performance.
Common Causes
- Blocked Heat Exchanger: A buildup of debris or limescale can restrict water flow, affecting heat transfer efficiency.
- Faulty Pump: If the circulation pump is malfunctioning, it may not effectively circulate water through the system, leading to inefficiencies.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer for any gas or electrical issues associated with this fault. However, you can check the pressure gauge and ensure it is within the normal range (typically 1-1.5 bar) and reset the boiler if necessary.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for addressing the E820 fault could range from £150 to £300, depending on whether the issue is a blocked heat exchanger or a faulty pump. Replacement parts and labour costs will influence the final price.