How to Check and Adjust Your Oven's Temperature Control. Tired of overcooked or underdone casseroles? Here's how to make sure your oven cooks at the right temperature.
Adjusting the Setting
Turn the oven off.
Pull off the temperature control knob. You can usually pry it off with a thin screwdriver or slide a piece of fabric up behind it and pull.
Note which kind of temperature control knob you have. There are two types: The first has a screw in the shaft of the knob; the second has an adjustment dial on the back of the knob.
Adjust the temperature with the first type by turning the screw in the shaft with a screwdriver. Turn it clockwise to lower the temperature; turn it counterclockwise to raise the temperature. Turn the screw just a little bit in the appropriate direction.
Adjust the temperature with the second type of knob by turning the dial on the back of the knob. (This dial is held in place with a screw or a clip that will need to be removed.) Raise the temperature setting by turning the dial counterclockwise; lower it by turning the dial clockwise. The notches are typically in 10-degree increments.
Test the oven temperature again.
Repeat until you're in the right temperature range.
Checking the Temperature
Put an oven thermometer at the center of the oven and set the oven to 350 degrees F.
Check the temperature indicated on the thermometer after 20 minutes. If it's not within 5 degrees of 350, you'll need to adjust the oven's temperature control.