Just turn down the heat.
For The conventional oven, there would be convection that heats and re-heats the air. As the heat rises, it peaks and cools, then drops back down just to be heated up again.
Perhaps the knob is on upside down? On my oven the knobs are removeable, you just pull it off.
You should heat up a quiche in the oven for about 15-20 minutes at 350F until it is heated through.
to heat up the toast .
a solar cooking oven
the oven indicator light stays on and the temperature light but i turn the oven nob on and the oven heat up then i turn off . it gos out tell the temperature cools down. then it come back 0n.
electrical energy of when you turn the oven on to thermal energy when it is heating up
To heat a baguette in the oven, preheat the oven to 350F, wrap the baguette in aluminum foil, and place it in the oven for about 10 minutes. This will help warm up the bread without making it too crispy.
In small oven heaters.
This would depend on the manufacter of the oven and what temperature you have it set to but it can typically take 20 - 30 minutes to fully heat up.
Yes, you can heat up leftovers without using a microwave by using an oven, stovetop, toaster oven, or even a slow cooker.