Problem with my FF78P Hotpoint Fridge/freezer?

Two days ago the Fridge ceased working, although Freezer was absolutely fine. Switched appliance off for 24 hrs then switched on again, all appeared to be well and both sections reached correct temperature. However, heat temperature red light is flashing but there appears to be no problem with temperature variation. However, when switching on we did not press the fast freeze control first. Would this have any bearing? I would repeat both fridge and freezer are at correct temperaturesand functioning well. These temps have been checked for 24 hours. Help?