BoilerFaultCodes
The most common Unical faults
Your boiler has shut down because it has detected an unsafe build-up of heat inside the unit.
Check that all radiator valves are fully open to allow water flow.Ensure the boiler pressure is between 1.0 and 1.5 bar on the gauge.Wait for the boiler to cool down and press the 'Reset' button.
Your boiler has detected that the water pressure is too low to operate safely, causing it to shut down to prevent damage.
Locate the filling loop (usually a silver flexible hose) underneath your boiler.Slowly open the small valve(s) to allow water into the system.Watch the pressure gauge and close the valve(s) once it reaches 1.5 bar.The fault code should disappear, allowing the boiler to restart.
Your boiler has detected that the water pressure is too low for it to operate safely and effectively.
Locate the filling loop (usually a silver braided hose underneath the boiler).Slowly open the valve or valves until you hear water entering the system.Monitor the pressure gauge and close the valves once it reaches between 1.0 and 1.5 bar.
Your boiler's electronic settings have been disrupted by outside electrical interference, causing the system to stop working properly.
Locate the reset button on the control panel.Press and hold the reset button for 5 seconds.Wait 2 minutes to see if the boiler resumes normal operation; if the code persists, a professional must recalibrate the settings.
Your boiler is struggling to move water through the system, which causes it to shut down to prevent overheating.
Check if the boiler pressure is between 1.0 and 1.5 barEnsure all radiator valves and external isolation valves are fully openBleed all radiators to remove trapped air pockets
Your boiler is overheating because water isn't flowing through the system quickly enough to take the heat away.
Check that your boiler pressure gauge is between 1.0 and 1.5 barEnsure all radiator valves and the boiler isolation valves are fully openBleed your radiators to remove any trapped air pockets
Your boiler has switched itself off because it has detected that the water inside has become dangerously hot.
Check that all radiator valves are fully open to allow water to flow.Ensure there is enough water pressure in the system by checking the gauge.Try resetting the boiler carefully once the unit has cooled down.
Your boiler has stopped working because the water pressure is too low for it to operate safely.
Locate the filling loop (usually a silver flexible hose) underneath or near the boilerSlowly open the small valves on the filling loop until you hear water flowingWatch the pressure gauge until it reaches 1.5 bar, then close the valves completelyPress the 'Reset' button on the boiler to clear the fault
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