Atag Boiler Fault Codes

Your boiler has lost track of the water temperature leaving the unit, which means it will stop working to prevent overheating.

Your boiler has stopped working because it cannot correctly measure the temperature of the water returning from your radiators.

Your boiler's internal components have stopped communicating with each other, meaning the central control unit cannot send or receive the signals needed to heat your home.

Your boiler has stopped working because the water pressure is either too high or too low to operate safely.

Your boiler has reached an unsafe temperature and has shut down to protect its internal components and your home's pipework.