My car cooked itself yesterday when stuck in a motorway closure. I had a light appear on the dashboard (I didn't know what it meant, rectangle symbol with a star in it) and then a little later the spanner symbol came on.
Car was fine and running OK, got stuck in a tailback and then a message came up about collant level and then coolant temp, one after the other. Looked at the temp and it was in the red.
Pulled over and released the pressure and then got going with the heater on full blast with the fan and it took most of the heat away from the engine to get me home.
When I was at the roadside with the ignition on the radiator fan was not on (water was still bubbling). This should have been on at this point shouldn't it ??
Any ideas what it could have been ??