[kevingadd]

This only helps much if the calibration is off linearly - in my case not only is the calibration off but the temperature flux up/down is more pronounced than it should be. I still make do, but it's definitely very easy for stuff to come out burnt or undercooked as a result.

[evgen]

Other have suggested ways to check your oven temp control, but one way to mitigate the problem slightly is to add some thermal mass to your oven. Unglazed quarry tile makes a nice baking surface and a double layer of that will prevent big temp oscillations in your oven.

[ars]

> but the temperature flux up/down

Have you checked if your air vents are blocked? Ovens don't have adjustable fires, they are always on/off.

I can't think of any kind of failure that would cause unusually high swings.

[adrianN]

When the temperature sensor in caked with something that provides thermal insulation the resulting lag in temperature feedback would mess with the oven's temperature control.

[Zenbit_UX]

Hate to be the one the point it out, but have you considered you might not be great at baking?