[fishing1000]

The car got hot very quickly and shut down. I came to inspect it and found out that there was not much coolant in the radiator although the container was almost full. I put coolant into the radiator and managed to drive the car home with both a/c and heater on. The gauge showed that the the temperature was in the middle most of the time. Occasionally it was near the hot mark.

Please help me correct the problem.

My questions to the experts are:
1) How come there was not much coolant in the radiator while the coolant container was almost full?
2) How can I check if the thermostat is not working?
3) How can I find out if the water pump is OK?
4) Where could have all the fluid in the radiator go?

Thanks