BoilerFaultCodesThe 6 most common faults
Your boiler has detected a safety issue with how it disposes of waste gases or a blockage in its drainage system, causing it to shut down to prevent damage.
Check the white plastic condensate pipe outside for signs of freezing or blockagesInspect the external flue terminal to ensure it is not obstructed by debris or plantsReset the boiler by turning the selector switch to 'R' for five seconds
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 the water pressure is too low for the system to operate safely, which has caused it to shut down temporarily.
Locate the filling loop (a flexible silver hose) underneath the boiler.Slowly open the tap or taps on the filling loop until you hear water entering the system.Watch the pressure gauge and close the taps firmly once the needle reaches between 1.0 and 1.5 bar.Restart the boiler if it does not automatically reset.
on the Baxi 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 Baxi 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