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LG refrigerators are renowned for their sleek design and advanced ThinQ technology, but even the most high-end appliances can encounter hiccups. One of the most frustrating issues homeowners face is a malfunctioning ice maker. Whether you are getting hollow cubes, a slow harvest, or no ice at all, the cause is usually narrowed down to a few common culprits.
Before you assume the worst and start shopping for a new unit, use this guide to troubleshoot the five most common reasons your LG ice maker has stopped working.
It sounds simple, but the most frequent cause of a “broken” ice maker is an accidental setting change. LG refrigerators often feature a Lock function on the external display (as seen in your ThinQ panel). If the lock icon is illuminated, the dispenser and ice-making functions may be disabled to prevent accidental use by children or during cleaning.
Additionally, some models have a physical on/off switch on the ice maker unit itself, located inside the freezer. If you recently moved items around in your freezer, you might have inadvertently toggled the switch to the “Off” position.
Your LG refrigerator is designed to protect your health and the longevity of the appliance. When the Water Filter becomes clogged with sediment, minerals, or contaminants, the water pressure dropping into the ice mold decreases significantly.
If the pressure is too low, the ice maker won’t fill properly, leading to small or hollow cubes, or the system may shut down entirely to prevent damage. LG typically recommends replacing the filter every six months. If your “Replace Filter” light is on, this is the first place you should look. Even if the light isn’t on, a premature clog can occur if your local water supply has high sediment levels.
The water line that feeds the ice maker is a narrow plastic tube. Because it runs through or near the freezer compartment, it is susceptible to freezing if the freezer temperature is set too low or if there is a slight air leak in the door seal.
If you can hear the water valve clicking (the “hum” of the fridge trying to fill) but no water enters the tray, the line is likely blocked by ice. You can often resolve this by safely using a hair dryer on a low heat setting to defrost the line or by turning the freezer off for a few hours (while monitoring your food safety).
LG ice makers require a minimum of 20 psi (pounds per square inch) to function correctly. If your home’s overall water pressure is low, or if the shut-off valve behind the refrigerator isn’t fully open, the ice maker will struggle.
Check the saddle valve or shut-off valve under your sink or behind the fridge to ensure it is pushed all the way to the “Open” position. If you use a reverse osmosis water filtration system in your home, it can sometimes drop the pressure below the threshold required for the refrigerator to operate its ice and water dispenser effectively.
The water inlet valve is an electronically controlled mechanical part that opens to allow water into the ice maker. Over time, the solenoid in the valve can fail, or the valve can become stuck due to mineral buildup.
If you have verified that your water pressure is sufficient and the filter is new, but the ice tray remains dry, the inlet valve is likely the hardware at fault. This component requires a multimeter test for continuity to confirm failure and usually necessitates a professional replacement to ensure a watertight seal.
Troubleshooting can save you time, but some repairs require technical expertise and specialized tools—especially when dealing with the complex electronics of the LG ThinQ system. If you have tried the steps above and your glass is still empty, it is time to call in the experts.
Chula Vista Appliance Repair Company specializes in high-end LG refrigerator repairs. Our technicians are factory-trained to handle everything from inlet valve replacements to control board diagnostics. We understand that a broken ice maker is a major inconvenience in the Southern California heat, which is why we offer prompt, reliable service to get your kitchen back in order.
Don’t settle for lukewarm drinks. Contact Chula Vista Appliance Repair Company today to schedule your professional diagnostic and repair service.
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(619) 880-5508