I recently renovated my kitchen and have a new Bosch wall oven. I've noticed many baking recipes that used to be reliable are no longer so. I have a ThermoWorks ChefAlarm and calibrated my oven according to the procedure on their website. The accuracy of the oven is pretty good - usually only 5-8 degrees lower than the display says. But the temperature swings are surprising: they're +/- 30 degrees. So if I set my oven for 350, the temperature ranges back and forth from 320 to 380 over time.
I've never checked the range on previous ovens so I can't say if this is normal. It seems to me to likely be a problem, especially when a cookie might only be in the oven for 10-12 minutes. Does anyone know? And a follow on: I'm tempted to reach out to Bosch customer service to see if there is a field modification to change this behavior. Anyone know if that's realistic?