Light stays on right after cooking
The warning light remains on even though all knobs or touch controls are set to off.
Start here: Wait until the glass is fully cool to the touch before deciding anything is broken.
Cooktop troubleshooting
LG Cooktop Hot Surface Light Won’t Go Off
Direct answer: If the hot surface light will not go off, the most common causes are a surface area that is still holding heat longer than expected, a burner control that is not returning fully to off, or a failed cooktop hot surface indicator switch that is stuck in the on position.
Most likely: Start by making sure every burner is fully off and the cooktop is actually cool. If the light stays on after the surface is cold, the strongest suspect is the hot surface indicator switch tied to one of the burner controls.
This one fools people because the light can stay on for a while after cooking and that part is normal. The useful split is simple: if the glass is still warm, wait and verify; if the cooktop is cold and the light is still glowing hours later, you are usually chasing a stuck control or failed indicator switch. Reality check: some radiant elements keep enough heat in the glass to hold that light on longer than you expect. Common wrong move: killing power, turning it back on, and assuming the problem is fixed just because the light resets for a short time.
Don’t start with: Do not start by buying a new cooktop or guessing at the glass top. This problem is usually in the control and indicator circuit, not the whole unit.
If the cooktop is still warmlet it cool completely before calling it a failure.
If the cooktop is cold for hoursfocus on a stuck burner control or hot surface indicator switch.
Last reviewed: 2026-04-17
What the stuck hot surface light looks like
Light is still on hours later
No burner has been used for a long time, the top feels cool, but the hot surface light is still lit.
Start here: Check for one burner control that feels loose, sticky, or not fully parked at off.
One burner seems to trigger it every time
The light behaves normally until a certain burner is used, then it stays on much longer or never goes out.
Start here: That points toward the control or indicator switch for that burner rather than the whole cooktop.
Light came on after cleaning or a spill
The cooktop works, but the warning light started acting wrong after moisture, grease, or cleaner got around the controls.
Start here: Look for residue or moisture around the burner controls before assuming an internal part failed.
Most likely causes
1. Cooktop glass is still retaining heat
Radiant cooktops can hold heat in the glass and element area longer than people expect, especially after high heat cooking.
Quick check: With the burner off, carefully feel for warmth above the suspect element only after enough cooling time has passed.
2. A burner control is not fully returning to off
A worn or sticky cooktop burner control can leave the indicator circuit engaged even when the burner seems off.
Quick check: Turn each control on slightly and back to off, then see whether one knob feels different or the light flickers.
3. Cooktop hot surface indicator switch is stuck closed
If the surface is cold and the light stays on steadily, the indicator switch for one burner is a common failure point.
Quick check: Notice whether the light stays on no matter which burner is used and whether all burners otherwise heat normally.
4. Moisture or residue around the control area
Spills and cleaning runoff can gum up a control shaft or create a temporary false signal around the switch area.
Quick check: Inspect around the burner controls for sticky residue, cleaner tracks, or signs of recent boil-over.
Step-by-step fix
Step 1: Make sure you are not chasing normal retained heat
A hot surface light is supposed to stay on until the cooktop area cools down enough. That is the first split to make before touching anything else.
- Turn every burner fully to off and leave the cooktop unused.
- Give the surface plenty of cooling time, especially if a large burner was used on high heat.
- Carefully check whether the glass above any burner still feels warm before calling the light stuck.
- If your cooktop has multiple hot surface zones, note whether the warning light is tied to one area or stays on regardless.
Next move: If the light goes out once the glass is truly cool, the cooktop is likely working normally. If the surface is cold and the light is still on well after cooling, move to the controls and indicator circuit checks.
What to conclude: You have ruled out the most common false alarm: normal heat retention in the glass top.
Stop if:
- The glass stays dangerously hot much longer than normal and you suspect an element is not shutting off.
- You smell overheating, see discoloration, or hear buzzing from a burner that should be off.
Step 2: Check for a burner control that is hanging up
A control that does not return cleanly to off can keep the hot surface light circuit active even when the burner looks idle.
- With power still on and all burners off, rotate each burner control slightly on and back to off one at a time.
- Feel for one control that is sticky, loose, rough, or does not click or park the same as the others.
- Watch the hot surface light while you move each control. A flicker or change can identify the problem burner.
- If there is visible grease or spill residue around a control, wipe the exterior area with a soft cloth dampened with warm water and a little mild soap, then dry it well.
Next move: If the light goes out after one control is worked back to its true off position, that control was likely hanging up. If no control changes the light and the cooktop is cold, the indicator switch is more likely than a simple sticky knob position.
What to conclude: A control that affects the light is the burner to focus on. If none do, the fault is probably inside the switch circuit rather than at the knob face.
Step 3: Rule out a temporary moisture or spill issue
After a boil-over or aggressive cleaning, moisture and residue can hold a control slightly out of position or interfere around the switch area.
- Unplug the cooktop if it has a cord, or switch off power at the breaker before any closer inspection around controls.
- Let the unit sit with power off long enough for any trapped moisture to dry out.
- Clean only the exposed control area and cooktop surface with a lightly damp cloth and mild soap, then dry thoroughly.
- Restore power and check whether the hot surface light now behaves normally after the cooktop remains cool.
Next move: If the light clears after drying and cleaning, the problem was likely residue or moisture rather than a failed part. If the light comes right back on with a cold cooktop, the failure is likely in a burner control switch or hot surface indicator switch.
Step 4: Decide whether the burner control or indicator switch is the better suspect
Once the cooktop is cold and simple cleanup did not help, the repair usually comes down to one of two parts on the affected burner circuit.
- Think back to whether one burner has been acting odd lately, such as running hotter than expected, not cycling normally, or feeling different at the control.
- If one control clearly felt sticky or inconsistent in earlier checks, treat the cooktop burner control switch for that burner as the lead suspect.
- If all burners heat and shut off normally but the hot surface light stays on with a cold top, treat the cooktop hot surface indicator switch as the lead suspect.
- Use your model information before ordering anything, because these parts must match the exact cooktop configuration.
Next move: If one burner behavior clearly points to a single control, you have a solid part path instead of guessing. If you cannot isolate a burner or the symptoms are mixed, it is smarter to stop before ordering parts blindly.
Step 5: Replace the confirmed switch part or call for service
At this point the safe homeowner path is either a targeted part replacement based on the symptoms you confirmed or a clean service call with a narrowed diagnosis.
- Order only the cooktop burner control switch if one burner control was clearly sticking or affecting the light behavior.
- Order only the cooktop hot surface indicator switch if the cooktop is cold, burners otherwise work normally, and the warning light stays on steadily.
- If you are not set up to open the cooktop safely and transfer wires one at a time, schedule appliance service and tell them the top is cold but the hot surface light remains on.
- After repair, run the suspect burner briefly, turn it off, and confirm the light comes on while hot and goes out after normal cooling.
A good result: If the light now tracks actual burner heat and shuts off after cooling, the repair is complete.
If not: If the light still stays on after the correct switch replacement, the problem is likely in the cooktop wiring or control circuit and needs professional diagnosis.
What to conclude: You have either finished the likely repair or narrowed it enough that a tech can move straight to the remaining electrical fault.
Replacement Parts
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FAQ
Why is the hot surface light still on when the burner is off?
Most often the cooktop glass is still holding heat, or one burner control is not fully returning to off. If the top is completely cold and the light is still on, a cooktop hot surface indicator switch is a common failure.
How long should a cooktop hot surface light stay on?
It can stay on well after cooking, especially after high heat use on a large radiant element. If it is still on hours later with a cold surface, that is no longer normal.
Can I still use the cooktop if the hot surface light is stuck on?
You can sometimes still use it if the burners cycle normally, but it is not ideal because you lose a reliable heat warning. If any burner seems to stay hot or act unpredictably, stop using it and have it serviced.
Is this usually the burner itself or the switch?
A stuck warning light is more often a switch issue than a failed radiant element. If the burner heats and shuts off normally, the switch side is the better suspect.
Will cutting power reset the hot surface light?
Sometimes it may clear briefly after power is restored, but that does not prove the problem is gone. If the light returns with a cold cooktop, the underlying switch fault is still there.
Do I need to replace all the burner switches at once?
No. If you can narrow the problem to one burner control or one hot surface indicator switch, replace only that confirmed part.