BoilerFaultCodesThe 6 most common faults
Your boiler has automatically shut down because the internal water pressure has climbed too high to operate safely.
Locate a radiator in your home with a bleed valve.Place a cloth or small container under the valve.Open the bleed valve slowly to release water until the pressure gauge on your boiler drops to between 1.0 and 1.5 bar, then close the valve tightly.
Your boiler has experienced an internal computer error that is preventing it from starting up correctly.
Locate the Reset button on the control panelPress and hold the Reset button for 2-3 secondsWait for the boiler to complete its restart sequence
Your boiler has encountered a computer or communication error within its main control board, preventing it from running safely.
Switch the boiler off at the fused spur switch or main power supply.Wait for 30 seconds.Switch the power back on and press the 'Reset' button on the control panel.
Your boiler has shut down because the water inside the unit has reached a temperature that is too hot to operate safely.
Check that all radiator valves (TRVs) are turned to the highest settingEnsure the boiler pressure is between 1.0 and 1.5 barWait 30 minutes for the unit to cool down and then press the Reset button
Your boiler's internal computer has encountered a software or hardware conflict and has stopped working as a safety precaution.
Locate the 'Reset' button on the boiler control panelPress and hold the button for 2-3 secondsWait to see if the error clears and the boiler restarts
Your boiler's internal computer brain has detected a software or communication error and has stopped working to protect itself.
Switch the boiler off at the fused spur or power switch.Wait for 30 seconds.Switch the power back on and press the 'Reset' button.
on the Atag E 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