How much does it cost to fix Remeha error code red zone?

Typical repair cost for the Remeha red zone fault is £180-450 including labour.

red zone High

Remeha red zone Fault Code

Q: What does the Remeha red zone fault code mean?

Your boiler is failing to light properly because the internal pilot flame is being lost or is too weak to stay on.

Also written as REDZONE — same fault.

The Remeha red zone fault code means: your boiler is failing to light properly because the internal pilot flame is being lost or is too weak to stay on.. It appears on 3 Remeha models in our database.

Technical description: failing or unstable flame of pilot burner

What causes the Remeha red zone fault?

This fault occurs when the boiler's control system cannot detect a steady flame at the pilot burner during the ignition sequence. The most common reasons are a worn-out sensor that can no longer 'see' the flame or a buildup of carbon and debris on the burner that prevents a clean, stable light-off.

Typical repair cost £180-450 (including labour)

Engineer required

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

Find a Gas Safe engineer

Search the official register for a qualified engineer in your area.

Gas Safe Register →

Remeha models that show the red zone fault code

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

Source

Remeha red zone 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