Fixing a short term Microwave--Emerson Microwave?

Hi, I don't know this machine but maybe a general answer will help, apart that is from seeking professional service. If you are meaning that you run the oven, it shuts off, then you run it again and it shuts off, then this is probably a heat problem, first are the air intakes clear, if not sort it, if so then are the fans running ? if not there's the problem, if a machine shuts off during a cooking cycle due to overheat then the recovery time is usually several minutes, but not always. Sorry but that's the best I can do without sight of the machine.
kindest regards
B.E.S. Microwaves
01424 447799

patrick
March 2009