How to Fix Control lock stuck on LG LSIS3018SS (Induction Range)

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Control lock stuck

If you’re facing a control lock stuck issue on your LG LSIS3018SS (Induction Range), you’ve come to the right place. I’m going to guide you through a straightforward process to tackle this problem. With the right tools and parts, you’ll likely fix this issue in just 1–2 hours, saving yourself from an expensive service call.

Part of our Top 20 Oven Models & Common Repair Issues Guide. Browse all oven repair guides for related models and issues.

Common Symptoms & Causes

A stuck control lock on your LG LSIS3018SS may present symptoms like:

• The control panel displays a persistent “LOC” or padlock icon that won’t clear.
• Pressing any surface burner or oven control button produces no response.
• Holding the Control Lock button for 3 seconds fails to disable the lock.
• The display remains lit and locked even after cycling the range’s power.

Typically, this issue arises from a glitched control board, a worn touch panel, or a software fault caused by a brief power surge or interruption.

Safety First

• Unplug the oven from the power outlet before starting any repair — never work on a live appliance.
• Wear work gloves when handling metal brackets, sheet metal edges, or sharp components.
• Take photos with your phone before disconnecting any wiring harnesses or connectors.
• Work in a well-lit area with enough floor space to lay removed panels flat.

Tools & Parts Needed

Essential Tools

• Phillips #2 screwdriver
• ¼” nut driver
• Multimeter
• Work gloves (heat-rated)
• Flashlight

Replacement Parts

• Control board
• Fundyliue EBR74164805 Range Oven Relay Control Board
• Phillips screwdriver

Step-by-Step Repair Instructions

Step 1

Start by pressing and holding the Lock button (or Child Lock button) for 3 seconds—this is LG’s built-in control lock release sequence. If the display shows a lock icon that clears, great! You’ve solved the issue with a simple user-mode lock. If not, move on to the next step.

Step 2

Unplug the range from the wall outlet for 10 minutes, then plug it back in. This power cycle drains residual capacitor charge on the control board, forcing the microcontroller to reboot and clearing most software-latched lock states. Pro tip: Always pull the plug rather than using the breaker to ensure a complete power drop to the board.

Step 3

Next, remove the rear panel to access the control board and locate the ribbon cable that connects the touchpad assembly to the board. A partially unseated ribbon cable can lead to intermittent or permanently stuck control signals. Before touching any internal components, ensure the range is unplugged, and press the ribbon cable connectors firmly until they lock into place.

Step 4

While the range is still unplugged, spray a small amount of electrical contact cleaner directly onto the Lock button’s contact pad beneath the touchpad. Rapidly press the button about 15 times to work the cleaner across the oxidized surface. Oxidized contacts create a high-resistance connection that the board may interpret as a continuous button press, leading to a lock that appears stuck. Allow the cleaner to evaporate for at least 5 minutes before restoring power.

Step 5

If the lock engages randomly or cannot be released after completing all previous steps, the control board EBR82797404 is likely faulty and requires replacement. A failed relay or damaged microcontroller trace on this board can cause the lock signal to remain active regardless of button input. When sourcing the replacement, verify the EBR82797404 part number on your existing board’s label before ordering, as similar LG induction models may use different board revisions.

Step 6

Finally, restore power to the range and test the control lock by toggling it on and off at least three times to confirm consistent behavior. Activate each induction zone briefly and run the oven to ensure no other functions were disrupted during disassembly or board replacement. If any zone fails to heat or the display shows an error code, note the code and check LG’s service documentation for further guidance.

Where to Buy Replacement Parts

You can find both genuine OEM and aftermarket replacement parts for your LG LSIS3018SS (Induction Range) on Amazon:

• LG LSIS3018SS induction range control panel lock reset
• Fundyliue EBR74164805 Range Oven Relay Control Board
• LG range touchpad ribbon cable reseating

When to Call a Professional

If the issue persists after following all these steps, the problem may involve a failed main control board, a defective temperature sensor, or wiring that requires specialized diagnostic equipment. In this case, it’s best to contact a licensed appliance technician. For gas models, please refrain from attempting repairs on the gas valve, burner orifices, or supply line—such work should be handled by a licensed gas fitter in most areas.

How Much Does This Repair Cost?

DIY repairs for a stuck control lock on the LG LSIS3018SS typically range from $0 to $50, covering any replacement parts like a control board or membrane switch. On the other hand, a professional service call usually costs between $150 and $300, factoring in both labor and parts. Tackling this repair yourself can save you over a hundred dollars.

Frequently Asked Questions

Why is the control lock stuck on my LG LSIS3018SS and won’t turn off?

The control lock can get stuck if the touchpad is unresponsive or if the range lost power during a lock cycle. Try holding the Control Lock button for 3–5 seconds or disconnecting power for 60 seconds to reset the panel.

Will unplugging the induction range fix a stuck control lock?

Yes, a hard reset by unplugging the unit for at least one minute often clears a stuck control lock. Plug it back in and check if the lock indicator light has turned off.

Could a stuck control lock mean my LG LSIS3018SS control board needs replacing?

If the lock persists after resetting, the control board or touchpad membrane may be faulty. It’s advisable to contact a certified appliance technician to diagnose and replace the affected component.

Recommended Products

These are the parts and tools I recommend for this repair based on compatibility and customer reviews:

• LG AGM73329018 Range Touchpad Control Panel
• EATAKWARD EBR74164805 Range Oven Relay Control Board, Replacement for LG LRE3021ST LRE3083SW LRE3083ST LRE6321ST Stove Oven
• Fundyliue EBR74164805 Range Oven Relay Control Board

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The Touchpad Panel That Actually Fixes the Stuck Control Lock on the LSIS3018SS

If your reset attempts don’t work and you’re still locked out, the touchpad control panel itself is usually the culprit—the lock function gets stuck in firmware or the ribbon cable loses contact with the main board. This is the OEM replacement that matches your model exactly and comes with the lock circuitry pre-calibrated from LG.

What works

• Arrives with correct ribbon cable connectors that snap into place without forcing—no adapter guessing or bent pins.
• Lock function resets immediately after installation; no software glitches or lingering state issues like you sometimes get with third-party panels.
• Mounting bracket alignment is spot-on, so you’re not drilling new holes or dealing with panel gaps that break the front seal.

What doesn’t

• This is a higher-cost fix; if a simple power cycle or factory reset worked, you’ve spent money you didn’t need to.
• Requires disconnecting power and removing the cooktop fascia—if you’re not comfortable opening the control cavity, this becomes a service call job.

I’ve seen people order aftermarket panels first and run into ribbon cable misalignment issues that make the lock problem worse; ordering the genuine LG panel from the start saves the diagnostic frustration. Grab the LG AGM73329018 Range Touchpad Control Panel if your reset didn’t clear the lock.

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