08. High

Remeha 08. Fault Code

Also written as 08 — same fault.

The Remeha 08. fault code means: your boiler is struggling to breathe because the vents or internal airways are blocked, preventing it from safely exhausting fumes.. It appears on 2 Remeha models in our database.

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description: Air transport. a. Fouling/clogging of the air supply, flue gas discharge or heat exchanger; b. Differential air pressure switch does not function: switch defective, gas/air connections loose/clogged/mixed up, or spring loaded damper does not open.
Typical repair cost £150-300 (including labour)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Remeha models that show the 08. fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Remeha 08. fault code information on this page is sourced and cross-checked against the official Remeha service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026