BoilerFaultCodesThe 6 most common faults
Your boiler has likely overheated, causing a safety sensor to shut the system down to prevent damage.
Wait 30 minutes for the boiler to cool down fully.Check that your radiator valves are open and not blocked by furniture.Check the boiler pressure gauge and top it up to 1.5 bar if it is too low.Turn the selector switch to the 'R' (Reset) position for at least five seconds and then release it.
Your boiler has stopped working because the water pressure is too low for the system to run safely.
Locate the filling loop (usually two silver braided hoses under the boiler)Open the valves slowly until you hear water entering the systemWatch the pressure gauge and close the valves once it reaches between 1.0 and 1.5 bar
Your boiler has tried to ignite but cannot get a steady gas supply or sense a flame, which means it has locked itself out for safety.
Check if your gas meter has credit (if on a prepayment meter)Check if other gas appliances, like a hob, are working to confirm gas supplyRotate the selector switch to the 'R' (Reset) position for five seconds and releaseIf it is freezing outside, check if your white plastic condensate pipe is frozen and thaw it with warm water
Your boiler has switched itself off because it has gotten too hot, likely due to trapped air or a blockage stopping water from circulating properly.
Turn off the boiler and allow it to cool down completely.Use a radiator key to bleed all radiators and remove trapped air.Check the boiler pressure gauge and top it up to 1.5 bar if it has dropped.Press the 'Reset' button on the boiler control panel.
Your boiler has detected that water is failing to move through the system correctly, which could be caused by air locks, a blockage, or a pump issue.
Check if your radiator valves are openEnsure the system pressure is between 1.0 and 1.5 barGently bleed your radiators to remove trapped air
Your boiler has tried to light several times but cannot create a steady flame, causing it to shut down for safety.
Check that your gas pre-payment meter (if applicable) has credit.Ensure your external gas emergency control valve is in the 'on' position.Hold the selector switch to 'R' for five seconds to attempt a reset.If it is freezing outside, check that your white plastic condensate pipe hasn't frozen.
on the Main Eco Elite
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 Main 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