Your boiler is limiting the maximum temperature it uses to heat your hot water cylinder, which may mean your water takes longer to heat up or doesn't feel as hot as usual.

DIY fix possible

Check the hot water temperature dial or digital setting on the boiler control panelEnsure the cylinder thermostat (usually found on the side of your water tank) is not set too lowObserve if the fault clears after the water cylinder has reached its target temperature