Low Information
6-7 on Remeha Gas 350

Your boiler is notifying you that it has successfully moved into its first stage of heating operation and is functioning as expected.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

Technical description

Operating signal stage 1

What causes this fault?

This message appears when the boiler's burner has successfully ignited and is operating at its initial power level to begin warming your home. It occurs as a normal part of the start-up sequence and indicates that the gas valve and ignition system are performing correctly. You are seeing this because the control panel is simply communicating its current live status rather than reporting a mechanical failure.

DIY fix possible

This fault may be fixable without an engineer. Check your manual first.

Find a Gas Safe engineer
Search the official register →

Related guides you might find useful

Is boiler cover worth it?

Break-even maths on monthly cover.

Read →

When to replace your boiler

7 signs repair isn't worth it anymore.

Read →

New boiler cost 2026

Realistic UK prices for a swap.

Read →