BoilerFaultCodesThe 6 most common faults
Your boiler is failing to light properly because the internal pilot flame is being lost or is too weak to stay on.
Why it happens: 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.
Full guide for red zoneYour boiler is struggling to light or keep its main flame burning steadily, which is preventing it from heating properly.
Why it happens: This fault occurs when the boiler's control system cannot detect a steady flame after trying to ignite the gas. The most common reasons are a worn-out sensing probe that can no longer see the flame, or a faulty gas valve that isn't providing the correct amount of fuel to keep the burner lit safely.
Full guide for Green zone; end of green zoneYour boiler is failing to light the gas or cannot stay lit, which means it will stop providing heat and hot water for your property loop.
Check if your gas supply is working elsewhere (e.g. at a gas hob)Check if your gas meter has creditPress the Reset button for 2 seconds to attempt a restart
Your boiler has sensed that the water inside is getting too hot and has shut down to prevent damage.
Check that all radiator valves are fully open to allow water to circulateEnsure your system pressure is between 1.0 and 1.5 bar on the gaugePress the reset button once to see if the error clears
Your boiler has detected that water isn't moving through the system correctly or is overheating too quickly, causing it to shut down to prevent damage.
Check that all radiator valves and isolation valves are fully openEnsure the central heating system pressure is between 1.0 and 1.5 barBleed any trapped air from your radiatorsReset the boiler to see if the fault clears
Your boiler has shut down because the water inside has become or is being detected as dangerously hot.
Check that all radiator valves are fully openEnsure the external system pump is running if visiblePress the reset button once the boiler has cooled down
on the Remeha Gas 610 Eco Pro
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