📋 Key Takeaways
- 1.What it means: Either the flue is restricted, or gas pressure at the boiler is too low.
- 2.What to do: Check flue terminal outside for obstructions. Gas Safe engineer required to test gas pressure.
- 3.DIY or engineer? A Gas Safe engineer is required — do not attempt to repair gas components yourself.
🔒Written by a Gas Safe registered engineer
Baxi — Baxi 600 Combi 24/28
Fault Code E28: Flue blocked or low gas
Either the flue is restricted, or gas pressure at the boiler is too low.
What to do: Check flue terminal outside for obstructions. Gas Safe engineer required to test gas pressure.
🔧 Gas Safe Engineer Required
This fault requires a Gas Safe registered engineer to diagnose and repair. Do not attempt to reset the boiler repeatedly. It is illegal to carry out gas work without Gas Safe registration.
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Full Technical Repair Guide — Pro Members
The component-level repair guide for this fault code is available to Pro subscribers — designed for Gas Safe engineers and heating professionals.
- ✓Exact components to test and replace
- ✓Pressure and temperature diagnostic values
- ✓Common misdiagnosis warnings
- ✓Printable fault diagnosis sheet
- ✓Direct links to genuine spare parts
📞 Get Help Directly
📄
Download ↗Baxi Baxi 600 Combi 24/28 — Official Manual
Installation & user guide from the manufacturer
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