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 the water inside is getting too hot because trapped air is blocking the flow and the circulation pump is not running properly.
Check your central heating pressure gauge to ensure it is at the correct level (usually around 1 to 1.5 bar).Bleed your radiators starting from the ground floor up to release any trapped air in the system.Check if the circulation pump is stuck and try resetting it, or consult your manual if the issue persists.
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 temporarily stopped working because the water pressure inside the system has dropped too low.
Locate the filling loop underneath your boiler or check your user manual for system-specific repressurising instructions.Open the valves slowly to allow water into the system while watching the pressure gauge.Stop filling when the needle reaches between 1.0 and 1.5 bar on the green zone, then firmly close both valves.
Your system has detected a potential electronic reading error during its routine startup check and has stopped working to prevent further issues.
Full guide for Altherma Hybrid EHYKOMB33 0The system's control sensors have been incorrectly wired or swapped during installation or maintenance, preventing the boiler from correctly reading temperatures.
Full guide for Altherma Hybrid EHYKOMB33 2Avoid the next call-out bill
Monthly cover means no unexpected bills when your boiler breaks down.
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