what is wrong with my 2004 bosch dishwasher?

when I start the dishwasher, after approx 1 minute the unit starts to make a funny loud noise (it sounds something like air and maybe a little water being sucked down a tube). The noise seems to be evident during the wash phase of the cycle. i aborted it part way through to prevent any possible further damage but i am not sure if the water is getting hot either. during emptying the unit sounds and functions like normal