BoilerFaultCodesTechnical description
Heating part load error
What causes this fault?
This occurs when the boiler's internal software has been manually restricted to a lower heat output than what the property actually requires. It is often caused by an incorrect setting during installation or someone accidentally lowering the maximum power limit in the digital menu, preventing the boiler from ramping up to full strength.
This issue is most noticeable during the first cold snap of winter when the boiler is suddenly unable to meet the increased demand for heat.
DIY fix possible
Locate the user control panel on the front of the boilerNavigate to the 'd.0' setting in the installer level (refer to manual)Check if the kW output has been set too low for your property size and increase if necessary
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