Hi there in my microwave

Question

hi there in my microwave when i switch it on the rotator, fan and lamp gets switched on automatically. but magnetron doesnot get started untill i start the timer on the microwave. how can I stop rotatorm fan and lamp getting switched on and make it run along with the magentron. when I open the door its fine so to keep all the 3 things off while powered on I have to keep the door open and as soon as i close the door all three start working with no heating heating is only on with the timer clock of microwave. It might be something to do with the door latches (or the wiring being in reverse) . Please confirm and let me know