overheating problems :s

[mikstoke1989]

i have a punto sporting on a 53 plate. had the car a cople of years and never had any problems. all of a sudden it has started overheating and cut out. have checked the thermostat and its all fine also blead the radiator and refilled yet still get the same problem, also the blowers are permentley cold.
any help would be much appreciated

 

[rallycinq]

Its not bled properly or the matrix is blocked.

Cheers

D