Oven not able to heat as high.
I have calibrated the oven at 350 x 2 hours, checking every 30 minutes; the brand new oven thermometer showed 350 every time, at the calibration I have had on the dial. I put it to 500 and it is very close, there too.
The problem is that's it - the stem is all the way maxed. The "broil" mark is much farther over, and I believe I used to get to very close to 600 maxed out. But then over time I discovered that "broil" meant 500 and I was radically off on actual temps.
I understand there are things that can be done but we rent and the LL won't want to repair this on his dime. Any immediate thoughts on diagnosis, and inexpensive (I hope) fixes?