Hi Mal, You do not tell me the model but I assume it is the whirlpool made Diplomat.F7 is a flow meter fault.You will need to order a new air break and this part is included.I think it is about £70 plus vat and postage.It goes on the left hand side when the outer case is off.Unplug the flow meter (plug with 2 blue wires) and then take the inner disc off in the cabinet.This twists and pulls a quarter turn.Then pull the air break upwards.Reverse these instructions to refit.All should then be well.All the best.Try interspares on 01526322540 for the part.
FOXY
December 2008