What does the Baxi Megaflo E128 fault code mean?
The E128 fault code on a Baxi Megaflo indicates a blocked flue, which prevents the safe expulsion of combustion gases from the boiler. This issue can lead to dangerous situations, including the risk of carbon monoxide poisoning, and requires immediate attention.
Common Causes
- Debris or Obstruction: Leaves, bird nests, or other debris may block the flue terminal, restricting airflow.
- Flue Damage: Cracks or damage to the flue pipe can impede gas flow and lead to blockages.
Can I fix it myself? (DIY)
It is strongly advised to call a Gas Safe Engineer to address this issue, as working on flue systems can be dangerous and requires professional expertise to ensure safety and compliance with regulations.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for resolving a blocked flue on a Baxi Megaflo is around £150 to £300, depending on the extent of the blockage and whether any parts need replacing. This cost includes inspection and clearing of the flue system.