I have to adjust my oven temperature with an oven thermometer. I have to set the oven higher to get to the temperature I want. It's sometimes as much as 100 degrees lower than the setting. To get it to 350 degrees I nave to set it to 400+ to reach the temperature.Please help.

one is the coldest setting
set it higher say about 1/2 the adjustment of the knob

The first thing to look for is the temperature probe inside the oven. If it is bent and touching the side of the oven, the oven wall will cool the probe, and the oven will always be to hot.

Then next answers depend on the vintage of the oven.
If the oven always runs 20? hot (for example) it is possible to adjust the set point on older ovens by removing the oven temperature setting knob and by using a long thin screw driver through the centre of the shaft to adjust the oven temperature to match the oven setting. You will need to buy or borrow an oven thermometer.

First of all, most oven thermometers move very slowly compared to the electronic sensors and controls on the oven. To make sure you are getting an accurate reading, the thermometer should be in the center of the oven, the oven should be preheated, then wait another 20 minutes after the preheat beep. If the temperature is less than 35 degrees higher or lower at this point, it can be adjusted via the controls. Usually on GE ovens you press and hold bake and broil at the same time until SF comes up in the display. Then press bake, then use the arrow keys to raise or lower the temperature setting. If the temperature is more than 35 degrees off, you may have a bad sensor, bad control board, or other problem.

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Possibly the oven is running at a higher temperature than what you set it for. This is not uncommon for ovens. Get an oven thermometer to check what it actually runs at and then you can adjust the temperature you set it at accordingly.

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You can have the oven recalibrated by a professional OR you can purchase an oven thermometer and check the temperature yourself. Place the oven thermometer in the oven.Set the oven to a specific temperature. When it indicates it is at that temperature check the thermometer. Adjust your setting by that many degrees. For instance, if you set the temp at 350 and the oven thermometer shows 450, then reduce your temperature setting by 100 degrees each time you use the oven.

Hello,
It sounds as if an element in the oven is not working do check again that the oven thermometer is on same scale as the oven settings farenheit or centigrade.Most likely it is an element fault.
Hope I helped.

Temp probe/thermometer inside oven dirty, or off attachment, or defective. On some models, a small screw head adjustment is provided to calibrate thermometer under dial knob. Else, I would just set dial 50 degrees higher rather than expense of new thermometer or dial.

This is a simple fix as long as the oven is heating properly and the only problem is that the temp seems higher than what the temperature control knob indicates...

Purchase an inexpensive oven thermometer from the hardware store and place it in the center of the oven. Set the temperature control knob to 350 degrees F.

Check the temperature indicated on the thermometer in the oven after 20 minutes. If it's not within 5 degrees of 350, you'll need to adjust the oven's temperature control.

Turn the oven off.

Pull off the temperature control knob. You can usually pull it off by hand, pry it off with a thin screwdriver, or slide a piece of cord 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 5 or 10-degree increments.

Test the oven temperature again.

Repeat until you're in the right temperature range.

Good Luck!

On my Epicure, you are supposed to press the bake selector pad then press the + button to set the temperature to 500 degrees or higher.  Then hold the bake button for 5 seconds.  The temp display is replaced by 00.  Release the bake pad and use the - or+ buttons to adjust the temperature in 5 degree increments.  When finished push cancel (or just do nothing).  Good luck.  I tried this and my oven kind of went haywire.  It decreased the temp by much more than the 10 degrees I had set it too.  May be something else wrong with my oven though?