BoilerFaultCodesThe 6 most common faults
Your boiler has automatically shut down because the water pressure inside the system has dropped too low.
Locate the filling loop underneath your boiler or near the hot water cylinder.Open the valves slowly to let mains water into the system until the pressure gauge on the front reads between 1.0 and 1.5 bar.Close both valves tightly and reset the boiler using the reset button.
Your boiler is temporarily pausing because the water pressure inside the system has dropped too low.
Locate the filling loop valves underneath your boiler.Open the valves slowly to allow water into the system until the pressure gauge reads between 1.0 and 1.5 bar.Close both valves tightly and reset the boiler.
Your boiler has stopped working because the water pressure inside the system has dropped too low to operate safely.
Locate the silver braided filling loop hoses underneath or near the boilerOpen the one or two small taps on the filling loop until you hear water flowingWatch the pressure gauge and close the taps once the needle reaches between 1 and 1.5 bar
Your boiler has switched itself off because the water inside it is heating up too quickly, which usually means the water isn't flowing through the system properly.
Check that all radiator valves are fully openEnsure the boiler pressure is between 1.0 and 1.5 bar on the gaugeTry resetting the boiler to see if the fault clears
Your boiler has tried to light several times but has been unable to establish a flame, meaning you will have no heating or hot water.
Check if your gas meter has credit (if on a prepayment meter)Verify other gas appliances in your home, like a hob, are working correctlyReset the boiler by pressing the flame/reset button for several seconds
Your boiler was working but has unexpectedly turned itself off because the flame went out and it cannot manage to relight it.
Check that your gas meter has credit and the gas emergency control valve is openInspect the white plastic condensate pipe outside for signs of freezing or blockagesPress the Reset button (indicated by a flame with a line through it) for one second
on the Glow-worm Energy 35 Store
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 Glow-worm 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
Avoid the next call-out bill
Monthly cover means no unexpected bills when your boiler breaks down.
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