BoilerFaultCodesThe 6 most common faults
Your boiler's water pressure has dropped too low, which is preventing it from working at its full heating capacity.
Locate the external filling loop, which is a silver braided hose connecting two pipes near your boiler.Open the valves at both ends of the hose slowly to allow water into the system.Watch the pressure gauge on the front of the boiler until the needle reaches 1.5 bar, then turn both valves firmly off.
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 stopped working because the water pressure inside your heating system has dropped too low.
Locate the external filling loop, which is usually a flexible metal hose connected to the system pipes near the boiler.Open the valves on both ends of the filling loop to allow water to enter the system until the pressure gauge reads between 1.0 and 1.5 bar.Fully close both valves and ensure the filling loop is disconnected if it is a removable type.
Your boiler has encountered a deep internal communication problem within its computer control system and cannot operate.
Locate the power switch or fused spur for the boilerTurn off the power for 60 secondsTurn the power back on and press the 'Reset' button
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.
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