BoilerFaultCodes
The most common Daikin faults
Your boiler has detected that the water pressure is too low to operate safely, causing it to shut down temporarily.
Why it happens: This fault occurs because the internal sensors have detected that there is not enough water inside the central heating system to circulate safely. The most common reason is a minor leak in the pipework or radiators, though it can also happen if air was recently bled from your radiators without the pressure being topped up.
Locate the filling loop (usually a silver flexible hose) underneath or near the boiler.Slowly open the one or two taps/levers on the filling loop until you hear water moving.Watch the pressure gauge and close the taps firmly once the needle reaches 1.5 bar.
Your boiler has detected that there is not enough water pressure in the system to operate safely, which has caused it to shut down.
Locate the metal braided filling loop underneath or near your boiler.Slowly open the valve(s) to allow water into the system while watching the pressure gauge.Close the valves tightly once the pressure reaches between 1.0 and 1.5 bar.
Your boiler has likely stopped working because it has overheated due to trapped air or a pump that isn't circulating water properly.
Check the system pressure and top up if it is below 1.5 barBleed all radiators to remove trapped airBleed the boiler's internal pump if accessible via the manualPress the reset button to see if the boiler restarts
Your boiler has detected trapped air inside the pipes or a sensor issue, which is preventing it from heating your water correctly.
Check the boiler pressure gauge and top up to 1.5 bar if lowBleed your radiators using a radiator key to release trapped airRestart the boiler to see if the fault clears
Your boiler has detected that the water pressure in the system is too low for it to operate safely.
Locate the filling loop (a flexible silver hose) underneath or near the boiler.Slowly open the valves on the filling loop until you hear water moving.Watch the pressure gauge and close the valves once it reaches between 1.0 and 1.5 bar.
Your boiler is failing to light the gas even though it is trying to start up.
Check that your gas emergency control valve (usually by the meter) is in the 'on' positionCheck if other gas appliances in your home, like a hob, are working correctlyRestart the boiler using the reset button to see if it was a temporary glitch
Your boiler is struggling to keep its flame lit, which is usually caused by a blockage in the drainage pipe or an incorrect gas supply.
Check the external white plastic condensate pipe for signs of freezing or blockages.If the pipe is frozen, gently pour warm (not boiling) water over it to thaw the ice.Restart the boiler using the reset button to see if the flame stays lit.
Your boiler has detected trapped air in the system or a faulty temperature sensor, causing it to stop heating to prevent damage.
Check the boiler pressure gauge and top up if below 1.0 barTurn off the boiler and bleed any air from your radiators using a radiator keyRestart the boiler to see if the air lock has cleared
Avoid the next call-out bill
Monthly cover means no unexpected bills when your boiler breaks down.
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