How to Fix Grate wobble on LG LRG4115ST (Gas Range)

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Grate wobble

In this step-by-step repair guide, I’ll walk you through fixing grate wobble on your LG LRG4115ST (Gas Range). With the right tools and parts, you can complete this repair in about 1–2 hours and save yourself the hassle of a 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

If you’re experiencing grate wobble on your LG LRG4115ST, look for the following symptoms:

• A cast iron grate rocks noticeably when a pot or pan is placed on it.
• Cookware slides or shifts unexpectedly on the front-left or front-right burner.
• A clicking or scraping sound occurs as the grate moves against the cooktop surface.
• The grate sits unevenly, with one corner visibly raised off the burner cap.

In my experience, grate wobble on the LRG4115ST usually stems from worn or chipped rubber feet, a warped cast iron grate from heat stress, or debris buildup around the burner cap that prevents the grate from seating flush.

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

• Grate rubber foot pads (set of 16–20)
• isopropyl alcohol

Step-by-Step Repair Instructions

Step 1

Start by removing all grates from the cooktop and flipping them over to inspect the rubber foot pads underneath. These small pads are critical for keeping each grate level and stable. If even one is missing, cracked, or hardened, the grate will rock. Pay special attention to the corners, as those pads endure the most wear.

Step 2

Next, carefully remove any damaged or deteriorated pads using a flat-head screwdriver if they’re adhesive-mounted. Be cautious not to gouge the cast iron. Once removed, clean each mounting surface thoroughly with isopropyl alcohol and let it dry completely. Any leftover grease or old adhesive will prevent the new pads from bonding correctly, and they’ll peel off quickly when heated.

Step 3

Now, peel the backing from each new rubber foot pad and press it firmly onto its mounting surface for at least 30 seconds per pad to ensure a strong bond. New pads will restore the cushioned gap between the grate and cooktop surface, preventing any metal-on-metal rocking. Use pads rated for high-temperature adhesion, as standard foam pads can soften and fail near the burners.

Step 4

For grates that span two burners, wobble can also be caused by an unlevel cooktop, so place a bubble level across the cooktop in both directions to check. If the surface is off, adjust the front leveling feet at the base of the range — typically turned by hand or with a wrench — until the cooktop is level. An unlevel range can also affect cookware stability, causing oil or liquids to pool to one side while cooking.

Step 5

Put the grates back onto the cooktop and press down firmly on each corner to check for contact. You should feel firm, cushioned resistance at every point without any rocking. If you notice any remaining movement, it could indicate a pad that didn’t bond fully or a leveling issue that needs further adjustment. Check all four corners systematically instead of just pressing the center, as edge contact is where problems usually arise first.

Step 6

Finally, perform a load test by placing a heavy cast iron pan on each grate and applying downward pressure while nudging it side to side. A properly restored grate will not rock, shift, or click under load. If it does, remove the grate and determine whether the issue is a pad or a leveling problem. This test is crucial for safety, as a rocking grate under a full pot of boiling water poses a genuine tip-over risk.

Where to Buy Replacement Parts

You can find genuine OEM and aftermarket replacement parts for your LG LRG4115ST (Gas Range) on Amazon:

• LG LRG4115ST burner grate rubber feet replacement
• LG gas range grate anti-vibration foot pad kit
• LG range cooktop grate leveling pad

When to Call a Professional

If the issue persists after following all the steps above, there may be a more serious problem involving a failed main control board, a defective temperature sensor or high-limit thermostat, or wiring that requires specialized diagnostic equipment. In such cases, it’s best to contact a licensed appliance technician. On gas models, avoid attempting work on the gas valve, burner orifices, or supply line — that work should be done by a licensed gas fitter in most jurisdictions.

How Much Does This Repair Cost?

If you tackle the repair yourself, replacing or adjusting grates on the LG LRG4115ST typically costs $20–$80 in parts, depending on whether you need new rubber feet or full replacement grates. A professional service call for this repair usually runs $150–$300, including labor. Doing it yourself can save you a significant amount of money.

Frequently Asked Questions

Why does my LG LRG4115ST grate wobble after cleaning?

After cleaning, food debris or residue buildup under the grate feet is the most common culprit. Ensure the cooktop surface and grate rubber feet are completely dry and free of grease before replacing them.

Can a worn rubber foot cause grate wobble on this model?

Absolutely. The small rubber feet on the bottom of each grate can wear down or fall off over time. Replacement feet are inexpensive and will restore a stable, level fit.

Is grate wobble on the LG LRG4115ST a safety concern?

Yes, a wobbly grate can tip cookware, leading to burn and spill hazards. It’s important to address the issue promptly to maintain a safe cooking surface.

Recommended Products

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

• AEB73125001 Stove Grates Replacement Parts for LG 5 Burner Gas Stove Grates Cast Iron Wok Support Burner Wok Grate 19.6’’ x 10.6’’ Side Surface Burner LRG3061ST/01 LRG3061BD Stovetop Range Grate 1 Pcs
• Allstare AEB73125001 Burner Grate Replacement Parts for LG Gas Stove Parts Range Grille Side Grate 19.6’’ x 10.6’’ LRG3061ST LRG3091ST LG Stove Top Cast Iron Cooktop Grate Wok Rack 1 Pack
• Upgraded AEB72914211 AEB72914208 Cast Iron Griddle Replacement for LG Gas Stove Griddle Plate LDG4313ST LG Stove Top Parts Range Cooktop 5 Burner Griddle Oven Flat Top Pan
• 20 Pcs Stove Grate Rubber Feet Replacement for GE Hotpoint Kenmore, Burner Grate Rubber Feet, WB2K101 Rubber Feet, Stovetop Grate Feet, Stove Rack Rubber Feet, Replace WB02K0101 AP2622260 PS241358

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The Rubber Feet That Stop Grate Wobble on the LRG4115ST

If your grates are shifting when you place cookware on them, nine times out of ten, the cast iron itself is perfectly fine—it’s those rubber feet underneath that have either compressed, cracked, or disappeared entirely. Replacing them takes only five minutes and costs less than a service call.

What works

• The set of 16–20 pads gives you enough to replace all feet on multiple grates, so you’re not scrambling for a second order halfway through the job.
• These universal-fit rubber feet grip the cooktop surface and seat the grate evenly—wobble disappears the moment you drop the grate back down.
• Installation requires zero tools; just peel off the old feet (usually stuck on with mild adhesive) and press the new ones in place, making this a genuinely no-sweat fix.

What doesn’t

• Some pads in the set may be slightly thicker or thinner than OEM feet, so you might need to mix and match or adjust how many you use per grate to dial in the perfect level—test the grate as you go.
• If the grate itself has a warp or crack, new feet won’t fix the wobble; you’ll need to replace the entire grate in that case.

I’ve had owners order a full replacement grate only to find out the real issue was those hardened rubber feet—a $40 fix they thought would cost $200. Clean the bottom of each grate with a quick wipe of isopropyl alcohol before pressing the new feet on, and you’ll achieve a solid bond that lasts for years. Grab the Grate rubber foot pads (set of 16–20) and test your grates before you do anything else.

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