Whirlpool 6th sense ice maker not working?

I have a whirlpool 6th sense American fridge freezer that has stopped making ice. The panel is displaying a red triangle with a red exclamation mark, also a red magnifying glass with a lattice effect and a red tick. The machine is due a new filter, but this has never stopped the ice making facility before, and the cold water Is still working fine. I have tried switching on/off, pressing reset button and checked that the ice making unit is not blocked.
Any help/ advice would be greatly received, many thanks