LG Cooktop Repair

LG Cooktop Repair Guide

These LG cooktops look sleek and modern. They definitely catch your eye in the kitchen. But when they start acting up, they've got unique problems other brands don't.

Burners Won't Turn On

Fire up the cooktop and nothing happens. No heat, no indicator lights, or maybe just certain burners refuse to work. These are common complaints on LG models.

First check the obvious – the power supply. Cooktops have their own dedicated circuit. Check the breaker panel. Sometimes a small power surge trips the breaker. Reset it and the cooktop may begin working again. This sounds simple but it fixes the problem surprisingly often.

Individual burners sometimes don’t work on the glass top models. The heating elements under the smooth cooktop surface can wear out. Replacing a bad surface element is often a repair best left to a cooktop repair technician.

Wiring connections work loose. All that heating and cooling makes metal expand and contract. Eventually wires can vibrate loose or break at connection points.

Control Module Problems

Control modules fail in these units somewhat regularly. LG packs a lot of electronics into a small space that gets hot all the time. This is not ideal conditions for electronic parts. They eventually give up. Usually you'll see error codes or some burners work while others don't.

Look for signs of water damage on the controls. Just one boil-over that seeps into the wrong spot can fry those circuits. The smooth top models are sealed pretty well, but liquid finds a way in eventually. Once moisture hits those circuit boards, corrosion starts eating away at the connections.

Touch controls can get glitchy. Sometimes they respond, sometimes they don't. Or they turn on by themselves. The sensitivity gets messed up over time. Cleaning solutions can make it worse - some chemicals damage the touch sensors. We’ve seen a bunch of LG LSCE365ST models with this exact issue.

Burners Too Hot or Not Hot Enough

Temperature control problems can drive you crazy. Set it on medium and it winds up scorching your pans. Or high barely gets water boiling.

• Faulty infinite burner switches often cause this problem on knob-controlled models. Those switches control power to the burners. When they start to fail, they don't cycle the element on and off properly. Temperature goes wherever it wants regardless of the setting. Replacing them usually fixes it.
• Relay failures happen in digital models. Instead of mechanical switches, they use electronic relays to control power. When relays stick closed, the burner stays too hot no matter what. When they stick open, you’ll see not enough heat.
• Sensor problems plague the fancy models with precise temperature settings. These cooktops use feedback from temperature sensors to adjust the heat. When sensors get damaged or drift out of calibration, your burner temperatures go haywire.

Induction Cooktop Issues

Induction models have completely different problems than standard electric cooktops. There are lots more electronics involved.

• Error codes pop up on the display when something's wrong. Each code means something specific. "E6" or "C2" tell us exactly where to look. Keep your manual - tells you what they mean. Or we can decode them for you.
• Cooling fans underneath the cooktop make noise when they're going bad. Listen for grinding or squealing. Those fans keep the electronics cool. When they fail, the cooktop shuts down to protect itself. It won't run again until the fan's replaced.
• Wrong cookware causes problems too. Induction only works with magnetic pots and pans. Try sticking a refrigerator magnet to the bottom of your cookware. If it sticks strongly, it should work fine. Weak magnetic connection means poor performance.

Cracked Glass Tops

Glass breaks sometimes. Doesn't matter how careful you are. Drop a can from the cabinet above - crack. Set down a heavy pot too hard - crack. It happens.

Hairline cracks might not affect performance right away. But they'll grow over time as the glass heats and cools. Eventually creates a safety hazard. Glass has sharp edges when it breaks, and moisture can get into the electronics underneath.

Full replacement is the only real fix for cracked glass. Some folks try epoxy or other fillers, but they don't hold up to the heat. Plus most aren't food safe. It’s not worth the risk.

Getting the right replacement glass matters. LG uses different glass for different models, and they're not interchangeable. You need the exact part for your specific model. One tiny difference in the pattern or cutouts and it won't fit right.

Schedule cooktop repair service when you need to have the glass top replaced.

Strange Noises

Cooktops shouldn't make much noise beyond maybe a soft hum or click as elements cycle on and off. New or unusual sounds mean trouble.

• Buzzing or humming that's louder than normal points to electrical problems. Could be a loose connection, failing relay, or power supply issue. Don't ignore these - electrical problems tend to get worse and could become dangerous.
• Clicking that won't stop usually means relay problems. The relay tries to engage but can't make proper contact. Keeps trying over and over. You hear this rapid clicking sound that drives you nuts. Control board needs work.
• Pops or snaps might be the glass expanding with heat. Some noise like this is normal, especially when first heating up. But loud pops could indicate the glass is under stress or something underneath is pressing against it. Could crack if the pressure's not relieved.

Cooktop Surface Damage

The glass surface takes abuse. Even careful cooks end up with scratches, stains, or damage over time.

• Sugar spills create permanent damage if not cleaned quickly. When sugar melts on the hot surface, it etches into the glass. There’s no fixing that damage once it happens. You have to clean spills while they're still fresh.
• Metal marks from sliding pots look like scratches but sometimes aren't. They're metal residue left on the surface. Special cooktop cleaners take them off. Regular glass cleaner won't fix them.
• Discoloration happens around the burners. This is a normal result of high heat over years of use. White glass shows it worst. Most cleaners won't fix it once it's set in. Sometimes light buffing with special compounds helps, but full restoration usually isn't possible.

When To Call For Help

Some LG cooktop issues you can handle yourself. Basic cleaning, checking breakers, making sure you use the right cookware on induction models -- simple stuff that doesn't involve taking things apart.

But for electrical issues, cracked glass, or anything involving the control systems, calling us makes sense. Our appliance repair techs have worked on hundreds of LG cooktops. We know their quirks and common failure points. They’re factory trained and carry the right diagnostic equipment.

We stock parts for popular LG models on our service trucks. We often fix problems in a single visit instead of ordering parts and coming back days later. And we guarantee our work.

Give us a call when your LG cooktop needs professional attention.

We'll get your kitchen cooking again without the headache of troubleshooting complex electronics yourself. Whether it's unresponsive controls, burners behaving badly, or anything else - we've seen it all.