you dont need to worry yaar its normal.....
if the needle doesnt move up the half level..thn its ok
..ur auto sys wrking fine....
remember engine needs a specific temperature to work efficiently...
if you keep it cool by direct fan....it is still not good for engine....
just servis ur radiatior & Always use COOLANT instead of only water...
it wll keep the RUST away frm ur radiator ...which is the worste enemy of cooling system...