the AC works fine for half an hour in day time but stops bowing cold air after half an hour. The AC service was done 2 years back. The AC works fine in the evening with no such issues.
What could be the possible causes for this issue
it could be your cooling system.
Have the radiator and condenser washed (external). Check the radiator fan checked.
Weak condenser which trips.
may be over filled gas. otherwise get the evaporator serviced