I have the same problem with my Bosch gas range installed 2 weeks ago. There is a 1/4-1/2" gap when the door is "closed". The light is not on, but it causes a lot of heat from the oven to come out of the gap. It gets so hot I can't touch the dials for the cooktop. It affects the cooking capability of the oven and I'm pretty sure it will soon start to melt the dials.
I've had a repair guy out once, he replaced the hinges. It was a little better (though there was still a small gap) until I used the oven again, now it is back to the big gap. Called Bosch and they said to call the repair guy again. ARG! Repair guy is calling Bosch tech support (which he said he already did) and will get back to me.
I read somewhere else that there is a screw you can adjust on the hinge (have to take the door off first). We'll see what my repair guy comes back with from Bosch.
BTW...Bosch customer service was not helpful about this at all, just told me to call a repair person again. I'm not happy right now...