H01.08 High

Remeha H01.08 Fault Code

Also written as H0108 — same fault.

The Remeha H01.08 fault code means: your boiler has detected that the water inside is heating up or cooling down much faster than it considers normal, so it has paused operation to prevent any internal damage.. It appears on 1 Remeha model 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: CH Temp Grad. Level3
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 H01.08 fault code

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

Source

Remeha H01.08 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 7 July 2026