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Super-Capacity 3 Door French Door Refrigerator with Door-in-Door™

  • LFX31945ST

  • Stainless Steel

Key Features

  • Super-Capacity (31 cubic feet)
  • Slim SpacePlus™ Ice System
  • Door-in-Door™ Easy Access
  • 10 Year Manufacturer's Limited Warranty on Linear Compressor

Super Capacity

With LG’s super capacity French door refrigerator at 31 cu. ft., you get 20% more usable space* so you can store more food than ever before.

*Compared to LG's standard width French door refrigerator


For those fly-by visits to the refrigerator, the Door-in-Door™ feature allows you to get in and get out providing easy access to beverages and snacks. Also, the additional shelf space gives you yet another way to keep your refrigerator organized.



Scan the QR Code for an exclusive look at the LG Super-Capacity French Door Refrigerator with the Door-in-Door feature!

Most shelf space.*

Ice makers are great, but not if it means you can't fit all of your food in the fridge. The Slim SpacePlus™ Ice System provides more shelf space and allows even more space for door bins.

*Standard width french door refrigerator, excludes other LG manufactured products

Fresher is better.

Smart Cooling Plus technology is designed to maintain superior conditions within the refrigerator. The Linear Compressor and Dual Evaporators react quickly to humidity and temperature levels and help keep your food fresher, longer. Meanwhile, strategically-placed vents in every section help to surround your food with cool, fresh air no matter where you put it.

Peace of Mind

Peace of Mind

When you buy a refrigerator, you don't want to worry that it won't last. Because the Linear Compressor uses fewer moving parts and operates more efficiently, LG confidently backs the Linear Compressor with a 10-year limited warranty.

Products with Greener Features

Products with Greener Features

LG considers the environmental impact on the earth and its people throughout the life cylce of our products.

This refrigerator model has been certified by the CSA Group to meet the industry's new Sustainability Standard for Household Refrigeration Appliances. For more information about CSA Group and this certification visit

Door Type French 3-Door
Total Capacity 30.5 cu. ft.
Size (W x H x D) 35 3/4" 70 1/4" 36 1/4"
Refrigerator 20.5 cu. ft.
Freezer 10.0 cu. ft.
Total 30.5 cu. ft.
Door-in-Door™ Yes
Sustainability Standard Certified (CSA) Yes
Ice & Water Dispenser Yes
Dispenser Type Integrated Tall Dispenser
Ice System Slim SpacePlus™
Daily Ice Production 3.5 lbs/3.8 IcePlus
Ice Storage Capacity 3.2 lbs
Water Filtration System Compact Filter LT700P
Smart Cooling Plus System Yes
Multi-Air Flow Cooling Yes
Temperature Sensors 10
Linear Compressor Yes
Fresh Air Filter Yes
Dual Evaporator Yes
Display Type SmoothTouch™ Control/White LED
Temperature Controls Electronic/Digital
Door Alarm Yes
Child Lock Yes
LoDecibel™ Operation Yes
SmartDiagnosis™ Yes
Auto Closing Door Hinge Yes
Freezer Door Type Pull Drawer
Smart Cooling Plus Yes
No. of Shelves 4 Split
Folding Shelf 1
Cantilevered Shelves Yes
Shelf Construction Spill Protector™ Tempered Glass
Crisper Bins 2 Humidity Crispers / 1 Bonus Drawer
Glide N’ Serve™ Drawer Yes
Refrigerator Light Ceiling and Side LED
No. of Shelves/Bin 6 (2 Adjustable Gallon Size)
Door-In-Door Yes
Door Bin Construction Clear Bins with Deco
Door Type Pull Drawer
Drawers 3
DuraBase™ Solid Drawer Base Yes
Drawer Divider Yes
Ice Bin Yes
Freezer Light Premium LED
No. of Door Bins/Construction Tilting Drawer / Plastic
Contour Door Yes
Hidden Hinges Yes
Surface Stainless Steel
Back Flush & Metal Cover Over Mechanical Parts
Available Colors Stainless Steel (ST)
Handles Matching Commercial Handles
Depth with Handles 36 1/4"
Depth without Handles 33 3/4"
Depth without Door 29 1/2"
Depth (Total with Door Open) 48 1/8"
Height to Top of Case 68 7/8"
Height to Top of Door Hinge 70 1/4"
Width 35 3/4"
Width (Door Open 90° with Handle) 45"
Width (Door Open 90° without Handle) 40"
Door Edge Clearance with Handle 4 7/8"
Door Edge Clearance without Handle 2 1/8"
Installation Clearance Sides 1/8", Top 1", Back 1"
Weight (Unit/Carton) 340 lbs. / 380 lbs.
Carton Dimensions (WxHxD) 38" x 73" x 39"
Limited Warranty 1 Year Parts and Labor, 7 Years on the Sealed System, 10 Years on Linear Compressor
UPC 048231784511

What People Are Saying

Rated 1 out of 5 by from Awful ice maker and dispenser The ice maker and dispenser on this refrigerator is absolutely the worst. Already replaced the ice maker mechanism once and the same result. You have to put your hand into the ice bin at least twice a day to shuffle the ice around before the ice dispenser works. We have had this refrigerator 2 years now, and there has not been a day that has gone by without my hand in the bin to move the ice around in order for the dispenser to properly dispense the ice. Other than that major flaw, the inside refrigerator space and layout is very functional. I bought the Lowes 5 year warranty, but they will not replace the ice mechanism again. They say it is a noted problem with the LG ice maker/dispenser of this type. If you like the feature of an ice dispenser, stay away from this model.
Date published: 2015-10-30
Rated 4 out of 5 by from Nice Size I have had this refrigerator now for just over 2yrs and for the most part it's a very nice refrigerator. But I have found a few things that are not so good about it as well. First of all the ice maker doesn't even keep enough ice on hand for 2 people because it's in the door and not very big. It can take up to 1 1/2 days to fill. Hope they have fixed it on the newer models. Also the long bottom drawer makes you have to open both doors to get anything out I think it should have been 2 drawers but I under stand if you need something longer in there it is a good ideal but not every energy effect. I really like having the 3 drawers in the freezer but the top drawer will not come out all the way so it can be a pain in the you know what when you need something fast and only have one hand. Other then this everything else has been great with this item. I love all the extra space inside I can put a watermelon in there and still have room left over unlike some of the other refrigerator's I have had.
Date published: 2015-10-13
Rated 1 out of 5 by from Unhappy customer This refrigerator had to be replaced in less than 3 years of use. I am very disappointing with LG appliances as first my stove had to be repaired after a little over 1 year of use and now my refrigerator had to be replaced. Never had I had this happen before with other brands. Now I am stuck with LG appliances and all my kitchen appliances are LG and I don't like mix match.
Date published: 2015-09-15
Rated 1 out of 5 by from Purchased 12/19/14 Freezer fan hitting ice I bought this refrigerator in Dec of 2014. I thought I liked this refrigerator until tonight. I heard a loud pinging noise coming from the kitchen. I opened the freezer drawer and saw that the back of the freezer has iced up. The fan blades are hitting ice. It makes a very loud noise. Very disappointed in a refrigerator that is less than one year old.
Date published: 2015-09-12
Rated 5 out of 5 by from I love it... One of the best refrigerators I have ever owned ... I love it!
Date published: 2015-08-31
Rated 5 out of 5 by from Beautiful Appliance The MOST impressive refrigerator we have ever owned. Kitchen was completely remodeled and we choose this refrigerator to compliment the overall new look. The features are smart and energy efficient and easy on the eyes. The convenient outer front door is brilliant and the freezer on the bottom is exactly where it belongs. Easy to clean and easy to reach for anything inside. No noise whatsoever - runs completely silent. Very smart product and great value.
Date published: 2015-07-12
Rated 3 out of 5 by from Terrible water dispenser I really liked the style of this one in the store. the shelves are good sizes and they move with easy. I had to write this review because I have had this refrigerator for about 6 months now and the worst thing and still is , is the water dispenser. This is the one thing you can not test in a store, if I could of I would not have purchased this model. Every time I have to get water, I am either wiping it off my face or clothes, off the floor or off the front door. It splatters ALL THE TIME. I have changed the water filter thinking that might help but NO! Also, I have to use two hands to dispense water sometime ( one to hold cup and one to press water lever) to make sure it comes on and gets into the cup or bottle.Also the word "water" on the lever is already coming off, 6 months later. I also wish for this amount of money, it would have measured the amount of water coming out, i.e. 1/2 cup or 4 oz., which would extremely help when cooking.The freezer is good size, nice deep bins on bottom. In door feature is good but I'm finding that I could have done with out it. Got it for kids to put thier things however it is not large enough for some bottles and a bit to tall anyway for my 8 year old to reach for top items. I hope this helps someone decision making. Overall, I think a little pricey for number of features or lack there of.
Date published: 2015-03-26
Rated 1 out of 5 by from VERY, Got this product over a year ago for my vacation home. I first used it for 2 weeks, second time for a month, 6 weeks in total. on my third use the ice maker doesn't work. I had the repair men to look at it an was told the fans in the freezer isn't working, i'm VERY disappointed.
Date published: 2015-03-10
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We're here to support you with our product.

View LFX31945ST Product Support

Contact us for any purchasing inquiries.


Ask your questions. Share your answers.
Please first review the detailed product information and help guides in the Product Support section for this product prior to posting a question.

Food in vegetables drawers is freezing. 

Asked by: Raj Gupta
We regret the trouble you have experienced with this refrigerator. Check to make sure the circulation air vents are clear, and that the humidity setting on the drawers is set properly. If this does not resolve the matter, then the refrigerator may require service. To make service arrangements, you may either contact our Customer Interactive Center at 800-243-0000, or you can check our Repair Provider Lookup on our website, at
Answered by: NeilE
Date published: 2015-11-06

What does r and dH stand for on the door where you touch to make changes to temps etc. My ice maker is making ice but not depositing it same is with the water

Asked by: Kkbud
The DH error code indicates that the LG Super-Capacity 3 Door French Door Refrigerator with Door-in-Door™, Model # LFX31945ST spent more than one hour trying to defrost. During Defrost, the refrigerator will increase the temperature at the evaporator to a preset temperature. If this temperature is not reached within an hour, the DH error code will be displayed. If this is the first time that you're seeing the r DH error code on your refrigerator, simply unplug it for 2 minutes to reset the unit and allow the system to try and defrost again. If you have seen this error code before, then the unit will need to a repair service...^IFV
Answered by: LGJoel
Date published: 2015-10-27

110 volts and 220 volts

Hi, I will be buying this refrigerator soon and the country I am shipping it to is 220v. Do you make it dual voltage or just 220v? If not I am planning in adding 110v panel to my house anyways, but I need to know the watts this refrigerator requires in order to make the right electrical 110 volts grid for my house, since the total wattage consumption of all appliances will be needed to determine the electrical board I need to install. Thank you.
Asked by: Totaltravel
be sure to find out if the unit will work on both 50 & 60hz. voltage is one thing, but the correct frequency is also important. They make converters if you need to run 60HZ on a 50HZ grid. this is also know as cycles.
Answered by: mikebt
Date published: 2015-08-18

Folding Shelf

Can the entire folding shelf be removed to make more room for taller items? Or, will removing it not give support to the shelf on the opposite side?
Asked by: JuneBug2
In the LG Super-Capacity 3 Door French Door Refrigerator with Door-in-Door™, Model # LFX31945ST, you can store taller items, such as a gallon container or bottles, by simply pushing the front half of the shelf underneath the back half of the shelf. Pull the front of the shelf toward you to return to a full shelf. But you can also pull the entire shelf out in the same way that the other shelves can be pulled out by tilting the front of the shelf up then pulling it straight up and out...^IFV
Answered by: LGJoel
Date published: 2015-06-30

On LFX31945, what is ERR 1F error???

Asked by: Waltg111
Hi Waltg11. The error code ERR 1F on the LG Super-Capacity 3 Door French Door Refrigerator with Door-in-Door™, Model # LFX31945ST refers to the ICE BLOWER FAN. All of the codes that indicate malfunctions or similar problems will be shown with an "Er" on the digital display. The LG refrigerator "Er IF" error code is the "Icemaker Fan Error" message. As the name suggests, this error code indicates a problem with the fan that controls the unit's ice production. If this problem occurs because of ice buildup, unplugging the unit for 3 to 4 hours and allowing it to thaw may fix the issue. Be sure to place towels on the floor to avoid a watery mess due to the thawing. Customer service should be contacted if the problem persists, (800) 243-0000...^IFV
Answered by: LGJoel
Date published: 2015-08-31

how do i thaw my freezer?

Asked by: Gordita619
Hello Gordita619. The Ice Maker on the LG Super-Capacity 3 Door French Door Refrigerator with Door-in-Door™ Model # LFX31945ST has an On/Off switch that you can use when the water supply will be shut off for several hours, when the ice bin is removed for more than one or two minutes, or when the refrigerator will not be used for several days. To thaw the refrigerator itself, you may have to empty all the food within and adjust the temperature, but you will need to be cautious because you may get a watery mess that might damage your property or cause flooding should the water lines rupture. We suggest that you contact our Customer Interactive Center (800) 243-0000 to consult with a product specialist about how to thaw it securely...^IFV
Answered by: LGJoel
Date published: 2015-07-25

Bad smell in door in door fridge. I have tried everything! Pls tell me EXACTLY how to remove the drip pan.

My kids are now reluctant to open the fridge. Sticks up the whole hour as soon as they do! Love love this fridge. Pls help
Asked by: dunny
We regret the trouble you have experienced with this refrigerator. The drip pan is not available in a location readily accessible. It is recommended to obtain the assistance of a qualified technician to access this area near the compressor system. To make service arrangements, you may either contact our Customer Interactive Center at 800-243-0000, or you can check our Repair Provider Lookup on our website, at
Answered by: NeilE
Date published: 2015-03-19

does this fridge qualify for energy star rating??

I purchased this LFX31945 last year and need to determine if there is a tax credit associated with it..
Asked by: taxtime
This refrigerator model has been certified by the CSA Group to meet the industry's new Sustainability Standard for Household Refrigeration Appliances. For more information about CSA Group and this certification visit This unit does not appear to have an Energy Star rating.
Answered by: NeilE
Date published: 2015-03-19
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