Baxi Avanta Fault codes & diagnostics

2 fault codes with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.

CombiSystemRegular Natural GasLPG 12-39 kW 2006-2014 Discontinued

Replaced by: EcoBlue

Download the Baxi Avanta manual The official installation & service manual (PDF) — the exact document these fault codes were verified against. PDF

The fault code is already on your display

Note it down before pressing reset — resetting clears the code immediately. How to read fault codes →

Fault codes

All 2 documented codes

Tap any card for details

E2

Your boiler is struggling to move water through the system, which is usually caused by trapped air or a blockage in the pipes.

High DIY-safe £0-250

What to check first

  1. Check that the boiler pressure is between 1 and 1.5 bar
  2. Turn off the heating and use a radiator key to bleed air from all radiators
  3. Ensure all radiator valves (TRVs) are fully open
  4. Reset the boiler using the reset button

Parts commonly replaced

  • Circulation Pump
  • Pressure Sensor
  • Automatic Air Vent

Related codes

Full explanation for E2
E8

Your boiler's fan has failed or is not spinning at the correct speed, which means the system has safely shut down to prevent waste gases from building up.

High Engineer only £280-450

Parts commonly replaced

  • Fan assembly
  • Printed Circuit Board (PCB)
  • Wiring harness

Related codes

Full explanation for E8