Jenn-Air Gas-Electric Grill Ranfe with Convection...

if possible, squat down in front of the range and put your ear as close to the bottom of the control panel/top of the door when you close it. there is a small motor that pulls the door in when you use the self-cleaning function. perhaps that motor is running all the time? its quite, more of a humm. this could explain why its locking itself. other than that, my convection oven JennAir has a small fan in the back that runs when the oven is on, regular or convections mode. you can see this fan squirel cage in the back wall of the oven. if you were to pull the range out, you will notice (atleast on mine) that there is another much smaller fan on the backside of the range behind the removable metal panel. what the smaller fan is for, i have no idea. so there are two fans, plus if you have the down draft feature, thats 3 total. hope this helps somehow.