BoilerFaultCodesThe 6 most common faults
Your boiler has switched itself off because it has detected that the internal water temperature has become too hot.
Locate the reset button on the control panelPress and hold the reset button for several seconds to clear the lockoutCheck that all radiator valves are open and there is enough pressure in the system
Your boiler has shut down because a sensor has detected that the water leaving the unit to heat your radiators is getting too hot.
Check that all your radiator valves are fully openEnsure the boiler pressure gauge is between 1.0 and 1.5 barPress the Reset button once to see if the fault clears
Your boiler has detected that the water is heating up too quickly or not circulating properly, causing the system to shut down to prevent overheating.
Check that all radiator valves are fully openCheck that the boiler pressure is between 1.0 and 1.5 barEnsure there are no blockages in the system by bleeding your radiators
Your boiler has likely overheated because water is not circulating properly through the system.
Check that your central heating valves (lockshields) are openEnsure all radiator valves are turned to the highest settingCheck the boiler pressure is between 1 and 1.5 barTry resetting the boiler after it has cooled down for 30 minutes
Your boiler is struggling to move water through the system correctly, which is causing it to shut down to prevent overheating.
Check that your boiler pressure is between 1.0 and 1.5 bar on the pressure gauge.Ensure all radiator valves and isolation valves under the boiler are fully open.Gently bleed your radiators to remove any trapped air pockets.
Your boiler has detected that the water isn't heating up or circulating correctly immediately after starting, causing it to shut down for safety.
Check that your central heating valves (lockshields) are fully openEnsure your radiators are bled to remove any trapped airCheck the system pressure gauge and top it up to 1.5 bar if it is too low
on the Biasi Antares Combi
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
Avoid the next call-out bill
Monthly cover means no unexpected bills when your boiler breaks down.
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