Just drove the car home , 10 miles and not a peep out of it. I just topped it up with water (it took 1.5 litres) with the blowers on full belt on hi temp. Left the blowers on driving back.

I'm so confused , where did the water go? It's not leaking anywhere and there's no real symptoms of head gasket failure.

I also left it running for 10 mins with no blowers on when I got home and the gauge didn't move a inch.