BoilerFaultCodesThe 6 most common faults
Your boiler has failed to light or cannot detect a flame, meaning your heating and hot water will not work until it is reset or repaired.
Check if other gas appliances in your home, like a hob, are working to ensure gas supply.Ensure your prepaid gas meter has credit if applicable.Press and hold the Reset button for 2 to 3 seconds to see if the boiler restarts.
Your boiler has switched itself off to prevent overheating, usually because the water inside has become too hot.
Check that your radiator valves are open to allow water to flow.Check your boiler pressure gauge and top it up to 1.5 bar if it is too low.Press the 'Reset' button on the boiler control panel to see if the fault clears.
Your boiler has detected that there is either not enough water pressure in the system or the water is not moving through the pipes as it should.
Check the pressure gauge on the front of the boiler; it should be between 1 and 1.5 bar.If the pressure is too low, use the filling loop valves under the boiler to top up the water pressure.Reset the boiler once the correct pressure has been reached.
Your boiler is overheating because water is not moving through the system quickly enough to be cooled down.
Check that all radiator valves are fully openEnsure the boiler pressure gauge is between 1 and 1.5 barCheck for any signs of an external system blockage or frozen pipes
Your boiler has experienced a major internal communication failure or a software logic error that has caused it to shut down for safety.
Locate the reset button or dial on the front control panel.Press or turn to the 'Reset' position for 5 seconds and release.Wait 2 minutes to see if the boiler restarts; if the code returns immediately, a professional is required.
Your boiler is failing to light the gas or cannot recognise that a flame has started, preventing it from heating your home.
Check that your gas emergency control valve is open and other gas appliances are workingPress the 'Reset' button on the boiler control panel for 2-3 secondsCheck that your external condensate pipe hasn't frozen if the weather is extremely cold
on the Biasi Antares System
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 Biasi 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