The 4 most common part(s) or condition(s) which cause the symptom Oven temperature problem are listed below starting with the most likely. Check or test each item and watch any available videos.
RepairClinic Item # 949510
As the oven igniter weakens over time, it will take longer for the gas valve to open. If there is an oven temperature problem, it may be that the oven igniter isn't opening the gas valve when it should. This will cause the oven to cool down more than it should before the burner reignites. The oven temperature should not cool by more than 40 degrees before the oven igniter relights the burner. An oven temperature problem is usually easy to correct.
RepairClinic Item # 703982
If there is an oven temperature problem, check the broil element. The broil element is a black tube near the top of the oven about as thick as a pencil. When it is operating normally, the broil element will glow red hot. If there is an oven temperature problem, the broil element may have burned out. In most ovens the broil element comes on during pre-heat which is enough to warm the oven up, but not to the right temperature. It is often obvious to see where the broil element has burned out because there will be a hole in the element or blisters on the outside of the element. Test the broil element using an Ohm meter. If it has continuity it's OK. If not, it should be replaced.
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RepairClinic Item # 1009025
The oven control board has a set of relays that turn on and off power to the bake and broil circuits according to the customer settings and sensor input. If the oven won't heat correctly the problem is usually with the heating components. However, if the oven control board is bad, it might not send voltage to the heating components. To determine why the oven won't heat, first test the simpler components in the circuit. The oven control board might have failed electrically but a multi meter and the wiring diagram of the oven will be needed to determine that.
RepairClinic Item # 1365
The oven sensor works with the main clock control board to regulate the oven temperature. If there is an oven temperature problem, this sensor might be defective. The sensor can be tested by using an ohm meter. As temperature rises, the resistance measurement also rises. The manufacturer of the oven sensor determines the correct resistance, if we have a testing video associated with this part, watch it to learn how to test the oven sensor. Oven temperature problems can be caused by other things, but this is one of the common causes.