No need of a new starter. I'm not familiar with a Crompton 2000, but most probably the latching /auxiliary contacts are in need of a careful clean. Disconnect the electric supply, remove the starter cover and using a torch you will see the contacts, insert a piece of paper between the contacts, carefully push the contacts closed, then pull out the paper. that usually does the trick. Also, have a look at the over load contacts, as they are in series with the latching ones. and they might be in need of the treatment. . John