BoilerFaultCodesThe 6 most common faults
Your boiler has detected that the water pressure is either too low for the system to run or there is a problem with the sensor that measures it.
Check the pressure gauge on the front of the boiler or the digital display.If the pressure is below 1.0 bar, use the filling loop valves to top up the system to 1.5 bar.Ensure the valves are fully closed after topping up and restart the boiler.
Your boiler has become too hot and has shut itself down as a safety precaution to prevent damage.
Check that your radiator valves are open to allow water to flow.Ensure the system pressure is between 1.0 and 1.5 bar on the pressure gauge.Press the Reset button on the control panel to see if the fault clears.
Your boiler has detected that water is not circulating correctly through the system, which prevents it from heating up safely.
Check that the boiler pressure gauge is between 1.0 and 1.5 barEnsure all radiator valves and isolation valves under the boiler are fully openBleed all radiators to remove trapped air bubbles from the pipeworkReset the boiler using the reset button once pressure is confirmed
Your boiler has stopped working because the water pressure is too low and needs to be topped up.
Locate the blue-handled filling link underneath the boiler.Slowly turn the lever(s) to allow water into the system while watching the pressure gauge.Close the lever(s) tightly once the pressure reaches between 1.2 and 1.5 bar.
Your boiler has switched itself off because it detected that the internal water temperature has become dangerously hot or a sensor has failed.
Ensure all radiator valves are fully open to allow water to flow.Check that your boiler pressure is between 1 and 1.5 bar on the pressure gauge.Turn the boiler off and back on again once it has had 30 minutes to cool down.
Your boiler has switched itself off because it has become too hot internally, likely due to a lack of water flow or a blockage.
Check that your central heating pressure is between 1.0 and 1.5 bar on the pressure gauge.Ensure all radiator valves and internal stop taps are fully open to allow water to flow.Try resetting the boiler by pressing the 'Reset' button on the control panel.
on the Atag iC Range
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 Atag 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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