I've got a 4 year old Jenn-Air 30 inch wall oven (single) and the temp isn't right. We bought an oven thermometer and the temp on the oven control says it's at 425, the thermometer says 375. Also the door won't stay all the way closed and there is hot air being blown out the bottom vent and the light will come on and go out all buy itself. I believe the door is not far enough closed. The air being blown out isn't real strong but being exhausted non the less. The oven takes forever to heat up and doesn't cook well as far as my wife is concerned. I believe the door is partially to blame. The manual is no help. Any help would be appreciated.