Cracked the glass cooktop on my range with a cast iron pot - is the oven still usable?

Nov 06, 2026 Last reply: 2 days ago 3 Replies
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DuskBear48

Went through almost the same thing a couple years back when a cast iron skillet slid off a pot and cracked my LG glass in two directions. Here's what I learned. On the oven question: the oven cavity and the cooktop are seprate heat zones, but they share the same internal wiring…

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So my husband was moving a big cast iron dutch oven off a shelf above the stove and it slipped and came straight down on the cooktop. It's an LG freestanding range with the smooth black glass top, and now there's a cracked spot right near the front with little fracture lines spreading out toward two of the burners. Obviously not cooking on that ever again. Here's what I'm stuck on though. We unplugged the whole thing as a precaution since we weren't sure if the cooktop and oven are wired togather inside or if the crack coud affect anything below. Is the oven portion actually safe to run if the top glass is damaged, or should we just leave the whole unit off untill it's dealt with? The other thing I'm wondering is wether that glass top can even be swapped out. I've seen videos of people replacing the cooktop glass on these and it looks like it's mostly unbolting the old one and dropping a new piece in. If the replacement part is reasonable I'd rather do that than buy a whole new range, since the oven itself has never given us a minute of trouble. But if parts and the repair end up costing close to a new unit, that changes the math.



Anyone been through this with a glass top range? Did you replace just the top or cut your losses and replace the whole thing?


Went through almost the same thing a couple years back when a cast iron skillet slid off a pot and cracked my LG glass in two directions. Here's what I learned.

On the oven question: the oven cavity and the cooktop are seprate heat zones, but they share the same internal wiring and one power feed, and the cooktop elements sit right under that glass. The crack itself doesn't stop the oven from working, but with fracture lines running toward two burners there's a real chance an element or its wiring got smacked hard enought to be damaged. A shorted element under cracked glass is not somthing you want live in a kitchen. Since you've already got it unplugged, my advice is leave it that way until either you pull the top off and eyeball the underside or a tech does. It's annoying but it's a few days of microwave meals, not a lifetime.

The glass is absolutely replaceable, and it's a genuinely doable DIY job. On mine it was unplugging the range, pulling it out from the wall, taking off the back panel screws, then unscrewing the glass assembly and lifting it out. On some LG models the elements mount to the glass itself, on others the whole top comes as one assembly with everything attached, so check your model number before ordering. The replacement glass alone ran me a few hundred dollars, and doing it myself meant that was the whole bill.

The math question is where it gets honest with you: if you hire it out, parts plus labor on a glass top for one of these often lands close to what a new entry level range costs, expecially if yours is a few years old. My take is either DIY the glass for a few hundred bucks or replace the whole unit, and skip the middle option of paying a service call. Check your homeowners policy too, since a dropped object damage claim sometimes covers this kind of thing depending on your deductible.

Replaced mine after a canning pot slid off and spider-webbed the front left burner area. The thing that saved me a ton of headache was pulling up the parts diagram for my exact model number first, because the top showed up as two different options, glass only or glass with the elements already mounted. I ordered the full assembly and the swap was basically unbolt old, unbolt new, done in an afternoon. Only other tip I'd add is take photos with your phone at every step during teardown, because there's a few wire connections back there and the photos made reassembly painless.

I watched my brother do one of these swaps on his range last winter and the thing that surprised me was how the cracked top still came out in one piece, he just lifted it slow and set it on an old blanket. It took him way less time than I expected for something that looked so busted.

Question though, is there any kind of rubber strip or sticky stuff between the new glass and the metal frame, or does it just sit flat on there? He tossed the old one before I got a look at it.

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