When your RCA electric stove burner won't turn off, stop using that burner and switch off power at the circuit breaker until you identify the problem. A damaged or cracked control knob is the most likely cause because it may not rotate the surface element switch stem to the OFF position. If the knob is intact and the burner still stays on, the surface element switch may have failed with its internal contacts fused together, sending continuous voltage to the radiant surface element. On touchpad-controlled models, an oven control board, control panel, or touchpad can also short and keep the burner energized. A damaged surface element board is another possibility when the surface element and wiring are not shorted. This troubleshooting applies to an electric stove burner not turning off, including a glass top stove burner or coil burner that remains hot after the control is set to OFF. Disconnect power before testing or replacing electrical parts, and use a wiring diagram and multimeter if needed. Enter your RCA range model number to find the exact replacement control knob, surface element switch, oven control board, control panel, or surface element board for your specific appliance.
01 - RCA Range/Stove/Oven Knob
If a range's surface element won't turn off, you should first inspect the control knob for damage. A broken knob may be unable to rotate the surface element switch stem to stop voltage being sent to the element.
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The surface element switch sends voltage to the surface element coil. Sometimes, when the surface element switch fails, the electrical contacts inside the switch fuse together, causing the switch to send continuous voltage to the surface element. If the surface element switch is defective, replace it.
If the control knob is cracked or broken it may not be turning the stem on the switch. Inspect the control knob and confirm the switch is in the off position. If the control knob is damaged, it will need to be replaced.
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04 - RCA Range/Stove/Oven Oven Control Board
On some range models, the control board provides voltage to all of the appliance's electrical components. If the board is defective, it might send continuous voltage to a surface element even after the element has been turned off. If you've confirmed the surface element itself has not shorted and the element is controlled by a touchpad, it's likely the control board is faulty. You can inspect the board for signs of damage or a shorted component. You can also use a multimeter to test for voltage reaching the bake or broil elements or igniters after reviewing the appliance's wiring diagram.
A range's control panel can allow the user to select the heating functions for both a stovetop and an oven. If the control panel is defective, one or more of the buttons may have shorted and you will not be able to turn off the element. If you've confirmed the surface element itself has not shorted and the element is controlled by a touchpad, it's likely that touchpad or control panel is faulty.
If a range's surface element is controlled by a touchpad, it's possible the surface element board has a shorted component that is sending continuous voltage to the element. You can inspect the board for signs of burning or a shorted component. If the surface element and wiring are not shorted it is likely the surface element board is damaged and will need to be replaced.