Why is my oven suddenly much hotter than usual?!
Answers:
Best Answer - Chosen by Voters
Could be your thermostat has burned out and needs replacement. Could also be it needs to be calibrated. Go to Youtube and look up Atticus 9799. They will show you how to calibrate it
life
Sometimes they just stop working the way they did. It happened to mine not to long ago. Unfortunately you may need to get a new one or you can try adjusting your recipes. I'm not sure though because I'm more familiar with more modern ovens.
You can buy an oven thermometer that sits inside the oven, which will show you what temperature it actually is. It may just be time to get a new one, though.