Won't turn off
An oven or burner that won't turn off is a genuine safety emergency — electric elements left on can ignite food residue, warp cookware, or escalate to a house fire. Before any diagnosis, kill the circuit breaker immediately and don't restore power until you've identified and fixed the cause. The most common failure mode on electric ranges is a welded-closed relay on the control board: relays switch the high-current element circuits on and off, and they can fail with their contacts physically fused together. The second most common cause, on cooktops, is a stuck infinite switch — the mechanical control behind the knob that cycles power — which can fail with its contacts closed. On gas ranges, a stuck-open gas valve is rarer but equally dangerous (gas continues flowing). Any stuck-on condition indicates a safety-critical failure; don't try to live with it or 'work around' it until a technician can look. Power off first, then diagnose.
Safety
Critical- Kill the breaker immediately — this is an emergency: An element or burner that won't turn off is an active fire hazard. Open your home's breaker panel and cut power to the range now; don't diagnose first. A stuck element can ignite food residue, melt cookware, or catch nearby items on fire within minutes. The breaker is the only reliable way to force the element off — the range's own controls have failed.
- Close the gas supply valve on gas ranges: For gas ranges with a stuck-open gas valve, close the gas supply valve behind the range in addition to killing the breaker. Gas continues flowing as long as the valve is open; even with the igniter off, accumulating gas can ignite from any spark source and cause explosion. Ventilate the area and call your gas utility if you smell gas.
- Don't attempt to use the range before repair: Even if you find a way to temporarily stop the stuck element (turning the knob to different positions, toggling the breaker), don't resume use. Relay and switch failures tend to worsen, not self-resolve. A stuck-on condition that 'comes back later' often escalates to permanent stuck-on. Replace the failed component or call a technician before the next use.
- Monitor the affected burner or element after killing power: An element that was stuck on may have reached extreme temperature before you killed the breaker. Stay with the range for 30+ minutes after power-off to confirm it's cooling and not causing secondary issues — look for any smoke, smell of burning plastic, or visible flame on nearby items. Don't leave the house until you're certain the situation is stable.
How to approach this
The first action is not diagnostic — it's safety. Kill the circuit breaker for the range or oven immediately when you discover a stuck-on condition. Do not continue using the appliance. For electric ranges, open the breaker panel and cut both breakers powering the range. For gas ranges with electric controls, cut the single breaker and close the gas supply valve behind the range as well. With power off and the appliance confirmed off (the stuck element or burner should stop heating within a minute), you can safely inspect. Identify which circuit is stuck: one burner, the oven bake, the oven broil, or multiple circuits. A single stuck circuit points at that circuit's specific relay or switch. Multiple stuck circuits point at the control board. For electric cooktops, swap knobs between positions to rule out switch vs relay: if the stuck position follows a specific knob, the switch is the culprit; if the stuck position follows a specific burner regardless of knob, the relay or receptacle is at fault. A control board replacement ($150-400) or professional service is typically required for relay failures — don't attempt control board repair without electronics experience.
Common causes
Ordered by how frequently each component is involved, based on OEM manual analysis.
Welded-closed relay on control board
Most commonControl boards use relays to switch the high-current circuits that power heating elements. Over time, the relay contacts can weld together from repeated arcing at high current — the contacts physically fuse. Once welded, the relay can't open even when the control commands it off. The element circuit stays closed continuously, and the element stays energized. Control board replacement is typically required; parts run $150-400 plus labor.
Stuck infinite switch (electric cooktop)
CommonThe infinite switch is the mechanical control behind each burner knob that cycles power on and off at varying duty cycles for different heat settings. The switch can fail with its contacts closed — the burner stays on at full power regardless of where the knob is turned. Diagnose by moving the knob through all positions; if the burner stays on through every position, the switch is stuck closed. Replacement switches run $15-30.
Failed control board (multiple circuits stuck)
CommonIf multiple burners or elements stay energized together, the failure is upstream at the control board rather than in individual switches or relays. Firmware corruption, power surge damage, or component-level failure can leave the board sending continuous 'on' signals to multiple circuits. A hard reset (breaker off for 10 minutes) may restore function temporarily but the underlying damage usually resurfaces. Replace the control board or call a professional.
Stuck-open gas valve (gas models)
Less commonGas safety valves can fail mechanically with the valve seat stuck open. Gas continues flowing even when the igniter signal stops and the control commands off. This is rarer than electric relay failures but more dangerous — gas accumulates until an ignition source causes combustion. Close the gas supply valve behind the range immediately and call a licensed gas technician. Don't attempt DIY replacement of gas safety valves.
Parts commonly needed
No verified parts are currently associated with this symptom for the NE58R9431ST.
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About this content. Common causes and FAQs are generated from OEM manual analysis and verified parts data. This is general guidance - your specific model may have different components or access points. Always verify with your model's documentation before ordering parts.