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 # 1107469
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 # 1560602
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 # 2629368
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.
RepairClinic Item # 1384926
Although it is not common, if there is an oven temperature problem during convection bake, the convection motor might be defective. If the convection motor isn't running it won't circulate the air inside the oven. An oven temperature problem is usually due to a burned out heating element or temperature control. The convection motor can be tested for continuity using an Ohm meter. Also, if the fan blade is difficult to turn by hand, the bearings in the motor might be worn. The convection motor can't be repaired, if it is defective it will have to be replaced.