When your oven won't turn off, shut off the power at the breaker or unplug the appliance and let it cool before troubleshooting. The most likely cause is a failed touchpad or control panel. A shorted touchpad can continue sending an "on" command, so disconnect the touchpad ribbon from the oven control board, restore power, and check whether the oven starts heating again. If it does not, replace the touchpad or user control and display board. Next, consider the temperature control thermostat, although this is less common. A defective thermostat can send incorrect temperature signals and affect oven operation. The oven control board is another possibility, especially if a relay has shorted closed and continues supplying voltage to the bake or broil circuit. A shorted bake element or broil element can also make the oven keep heating. Inspect each element for holes or blisters and use a multimeter to check for a short to the outer case. These steps can help diagnose an oven not turning off or answer how to turn off an oven that keeps heating. Enter your model number to find the exact replacement part for your range, stove, or oven.
01 - Range/Stove/Oven Touchpad and Control Panel
If the oven won't turn off, it's possible that the touchpad has shorted or is malfunctioning in some other way. To help determine this, shut off the power to the appliance to allow it to cool down and disconnect the touchpad ribbon from the control board. Restore power to the unit and observe whether or not the oven turns on with the touchpad ribbon disconnected. If the oven does not turn on, it's likely the touchpad is the source of the problem and the component will need to be replaced.
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If the oven won't turn off, you should unplug the power cord or shut off the power supply and let the oven cool down. Disconnect the touchpad ribbon from the control board and restore power to the oven. If the oven does not start to heat back up with the touchpad ribbon disconnected, the touchpad is likely defective and will need to be replaced.
03 - Range/Stove/Oven Temperature Control Thermostat
The temperature control thermostat monitors the temperature inside the oven and cycles on the heat when the oven temperature gets too low. If the temperature control thermostat fails, the oven won’t heat. However, this is not very common. Before replacing the oven thermostat, first check more commonly defective components—specifically the igniter and the bake and broil elements. If these components are not defective, the temperature control thermostat might be at fault. The temperature control thermostat cannot easily be tested. If you suspect the thermostat is defective, replace it.
The oven control board has relays that send voltage to the bake and broil circuits according to the user settings and sensor input. If one of the control board relays shorts closed, the control board may send continuous voltage to the heating circuit. If the oven continues to heat after it is turned off, the control board is likely defective. If the control board is defective, replace it.
Sometimes, if the heating element burns out, it can short out to the inside of the oven. If the heating element has shorted out, the oven will not turn off. Often, if the bake element has shorted out, it will be visibly damaged. Inspect the heating element for holes or blisters. To determine if the bake element has shorted out, use a multimeter to test the element for continuity. If the bake element does not have continuity, replace it.
If the broil element is shorted out, the oven may not turn off. Often, if the element has shorted out, it will be visibly damaged. Inspect the broil element for holes or blisters. To determine if the broil element is shorted out, use a multimeter to test the element for continuity. If the broil element shows continuity from the terminals to the outer case, this indicates that it is shorted out. If the broil element is shorted out, replace it.