gassing a chiller

[d foxxer]

i have been offered a cafferys double size drinks chiller but it seems not to be coming up
very cold does any one know roughly what i should pay to have it re gassed i havent actually
seen it as it is at my sons works they were using it to keep their lunch boxes cool but its not
cooling them any ideas chaps atb foxxer

 

[sikadog]

It may not need re gassing there are a number of things that could be stopping it chilling properly.
Cost of a re gas about £75.00 or more ( £50 callout + gas + time ? )