Oven shuts down before reaching correct temperature

If your Frigidaire oven is not heating up to the high temperature, there could be a few possible causes:

1. The thermostat may be malfunctioning: The thermostat controls the temperature of the oven and if it's not working correctly, it could prevent the oven from reaching the high temperature.
2. The heating element may be malfunctioning: If the heating element is not working properly, the oven may not be able to reach the high temperature.
3. The control board may be malfunctioning: If the control board is not functioning properly, it may not be sending the correct signals to the heating element or thermostat, preventing the oven from reaching the high temperature.
4. The oven may be in a cleaning or self-cleaning cycle: when the oven is in a cleaning cycle, the temperature is raised to a high level to clean the interior of the oven.
5. The oven may be in a energy saver mode: some ovens have a energy saver mode that decrease the temperature by a certain degree to save energy.

if it is an electronic timer temp controller you might want to check it

This type of problem normally can be ascribed to a defective thermostat. Unfortunately there is no test for a thermostat, it has to be replaced to see if the problem has been sorted out.
One thing you can do is remove the thermostat bulb from the oven and place place it in a position where it will not heat up. Place an oven thermometer in the oven. Switch on and see of the temperature climbs above what you wee seeing before. This is a very much hands on test as you have no control over the temperature that the elements can get to. As soon as you see the temperature reach a point above that seen before, shut down immediately.

This type of problem normally can be ascribed to a defective thermostat. Unfortunately there is no test for a thermostat, it has to be replaced to see if the problem has been sorted out.
One thing you can do is remove the thermostat bulb from the oven and place place it in a position where it will not heat up. Place an oven thermometer in the oven. Switch on and see of the temperature climbs above what you wee seeing before. This is a very much hands on test as you have no control over the temperature that the elements can get to. As soon as you see the temperature reach a point above that seen before, shut down immediately.

If you are monitoring the oven temperature with an analog style thermometer you may actually be ok, but seeing the thermometers slow reaction time.
Some newer ovens actually do pre-heat beep prior to reaching temp in an effort to conserve eelectricity.
A good home test is to try your oven at several different temps to see if there is any variation in internal temperature. Try it one day on 300, the next at 375 and another day at 450. Give your analog style thermometer time to catch up (usually just about 15 min) and leave it on for a half an hour to see if the temp maintains.
Also Beware of aluminum foil AND THE NEW OVEN LINER MATS as they can alter oven performance bay absorbing and blocking the ovens natural heat radiation and convection air flow currents that happen in all ovens, not just convection models.
Another interesting fact is that older ovens used a thermostat in them that operated much like your thermometer and was very slow to react making the oven typically about 100 degrees hotter than where the customer set it. This was just a fact of life before the advent of electronic temperature management and became noticeable when people began trying to bake older "hand me down" recipes in the newer ovens with less than stellar results.
You can mimic the older oven performance by preheating the oven about a hundred degrees higher than called for and after it reaches temp, re-set it to the correct temperature and put the items in right away.
If you find your temperatures fluctuating ask your servicer to replace first the temp sensor and as a last resort the control board as this part is usually pretty expensive.
Good Luck with this!

For any oven not too shut off after reaching the set temperature, usually means the thermostat is faulty that controls the temperature.
Usual solution is to replace the thermostat.

thermostat

You will need to replace the temp probe Call704-891-6557 we'll tell you how to do it safely.

I need to bake in my oven how can I find the button to set the temp to bak?

it is reaching the correct temperature and then switches back on when cools a bit?