BoilerFaultCodesAtmos 8 Fault Code
The Atmos 8 fault code means: your boiler has stopped working because the internal fan is moving at the wrong speed or cannot communicate with the main control board.. It appears on 4 Atmos models in our database.
Technical description: Fan speed incorrect — fan rubbing against casing; wiring between fan and controller; check wires for poor contact (tacho signal); replace fan; replace controller
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Atmos models that show the 8 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Atmos 8 fault code information on this page is sourced and cross-checked against the official Atmos service / installation manuals for each affected model.
- Atmos Intercombi HE32 manual (PDF)
- Atmos Interopen HE22 manual (PDF)
- Atmos Intersystem HE26 manual (PDF)
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026