00. High

Remeha 00. Fault Code

Also written as 00 — same fault.

The Remeha 00. fault code means: your boiler is confused and thinks the flame is already lit before it has actually started, so it is refusing to fire up for safety reasons.. It appears on 3 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: Flame simulation. Check ionisation probe (distance 3 - 4 mm).
Typical repair cost £150-250 (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 00. fault code

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

Source

Remeha 00. 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