How to recallbrate my oven

Do you have an oven thermometer?

Buy and inexpensive oven thermometer. Set your oven to a certain temperature wait till it heats up and then read what your oven thermometer says. I don't know how to calibrate an oven, but you can make adjustments based on the actual temperature according to your thermometer. For instants my oven is 20° lower than it should be. So I simply add 20° to whatever temperature a recipe calls for.

Get a good oven thermometer. The manual for your oven will tell you how to change it to make the oven to a truer temperature. My oven when it was new, was off, it was warmer than it should be. Hubby was able to regulate it by doing what the manual said to do, and we haven't had to readjust it yet after close to two years.

You don't mention if your oven is electric or gas. Below is a video aobut what 3 types of common problems will affect a gas oven:

https://www.youtube.com/watch?v=rKWegr6DLuA

This first video is about how to calibrate an oven with a knob that you turn to set the temperature, and the second one is how to calibrate an oven with a digital display:

https://www.youtube.com/watch?v=C3bkHuTeUZw

https://www.youtube.com/watch?v=3WZcPdzh82Y

Thanks for using HOMETALK for answers and good luck :)

I think I'd call an appliance repair...sounds like a heating element in the process of dying.