BoilerFaultCodesThe 6 most common faults
01
é10 High DIY-safe
Your boiler is struggling to push water around the system, usually because the pressure is too low or air is trapped inside the pipes.
What to try first
Check your boiler's pressure gauge and ensure it reads between 1.0 and 1.5 bar.If the pressure is low, use the filling loop to top it up to the correct level.Bleed your radiators starting from the one furthest away to remove any trapped air.
02
é1 High Engineer
Your boiler is struggling to ignite or begin its normal operation sequence, so it has locked itself out for safety.
Full guide for é103
é2 High Engineer
Your boiler is failing to start up properly, meaning it cannot provide heating or hot water at this moment.
Full guide for é204
é7 High Engineer
Your boiler is failing to start up properly, meaning it cannot ignite to provide you with heating or hot water safely.
Full guide for é705
é13 High Engineer
Your boiler has detected a safety-related electrical overload or thermal issue inside the main burning chamber and has shut down to prevent damage.
Full guide for é1306
é0 High Engineer
Your boiler has stopped working because one of its internal temperature sensors is providing faulty data, preventing the system from safely heating your home.
Full guide for é0on the Remeha Avanta
Circulation pumpPressure sensorIgnition electrodeGas valveControl boardIgnition transformer
Based on parts cited in our fault code database. Your engineer will confirm what's actually needed after diagnosis.
Call a Gas Safe engineer if…
- You can smell gas or see signs of a leak
- The Remeha shows an Emergency or High severity code
- The boiler keeps locking out after repeated resets
- You've tried the DIY checks and the fault hasn't cleared
- There's visible water leaking from the boiler
- The flame is yellow or orange instead of blue