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Hi I have a 2003 996 C4S, Last weekend got an engine warning light, switched off and started again later and goot coolant low warning, so I topped up, was driving again today for a few hours and got coolant warning and Hight temp red light, yet the tem guage seemed ok around 80 in the middle. stopped and saw steam from engine bay, could not locate topped up water which was below min but not by much and was OK got me home. I noticed that heater was not blowing hot as I put it on just in case. Is it possible there is an airlock, or does anyone recognise these symptoms. Any advice welcome Declan