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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

Easy Access to Family Favorites

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. Only LG Door-in-Door™ models include bonus door bins for added organization and storage.



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 DON'T BUY! FAN WENT BAD AFTER 1.5YEARS. Displaying error code on door. finger prints are hard to remove. Dents very easy.
Date published: 2016-02-05
Rated 1 out of 5 by from Poor Exeperience We bought this refrigerator as showpiece of our kitchen...what a mistake. We have had 5 failures of the refrigerator since purchase. It keeps freezing up and have lost hundreds of dollars in food not to mention the lost time to be here for service technician. The fans, defrost heater, control panel has been replaced. Some parts TWICE! Every other LQ appliance we own is great, but NOT THIS!!!!!
Date published: 2016-01-30
Rated 4 out of 5 by from Like the size Exactly one year, and after the warranty, we started having problems with the ice maker. We were able to reset it a couple times and got it to work. Also the front panel, where the ice maker/water filter is started to come off. It is half on. It is a hard plastic. Not sure how that could be fixed but it sure makes the fridge look ugly and older then it is. Other then that it keeps things cold and I really like the size of it.
Date published: 2016-01-28
Rated 1 out of 5 by from Can't clean up spilled kool-aid! I loved this refrigerator right up until my kids spilled red kool-aid and some seeped under the drawer hood cover. Now I have to look at the spill every day and can't get to it to clean it.
Date published: 2016-01-10
Rated 2 out of 5 by from Great Fridge/Lousy Ice Maker = Keep Shopping This fridge is only okay. The rear access door always flies open when you open the main right side door. But that is only a nuisance. The main problem is that the ice maker jams constantly to the point where the ice maker is virtually useless. With the price paid for this refridegerator, something like that should not be a problem. They know that it is a problem and yet they do not make good on the issue. Browse the complaints on this model you you will see it is a widespread issue. I bought all LG appliances when I remodeled our house - stove, fridge, micowave and dishwasher. I will not buy LG brand again due to their failure to make good on the poorly engineered ice maker.
Date published: 2015-12-21
Rated 1 out of 5 by from DIED ...purchased on 4/26/2013 Dead on 12/3/2015. Not what I expected and I we our whole family loved this fridge. Giving LG one more try because their refrigerators still have the best features.
Date published: 2015-12-09
Rated 2 out of 5 by from LG ICE Maker issue the Ice maker causes major issues, does not work constantly pulling out the ice maker to unclog the ice shoot, we turn off the Ice maker now.
Date published: 2015-12-03
Rated 5 out of 5 by from love door in door bought this fridge June 2014 and waned to review now after continuous use. It has been wonderful. Love the door within door for everything you need all the time. less food spoils and the bottom freezer with 3 areas to put items is fantastic and holds tons of frozen items, more than my old upright freezer. Only thing that bugs me is when humidity is up, I live in dry Alaksa, or the top freezer drawer has maybe too much in it, a bit of frost developes. Fixed this by making sure vent holes are always open and then putting less in dawer. I'm not crazy about the vegetable/fruit 3 drawers system, a 2 drawer would be better storage wise. I think i'm being picky though, took some adjustment about how to keep Costco size fruits and veggies in the drawers. Absolutely love love the meat and deli drawe, holdslots of stuff and is very handy. Water and ice feature works constantly and makes ce very fast, enough for us! So if you are debating over this fride versus another model, get this one or one like it by LG, its a dream!
Date published: 2015-12-01
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We're here to support you with our product.

View LFX31945ST Product Support

Contact us for any support 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.

Im getting Er message on display

Asked by: Gina gina
We regret the trouble you have experienced with this refrigerator. An ER indication is an error message. There are generally some additional letters posted, indicating what type of error this might be. Please contact our Customer Interactive Center at 800-243-0000 for assistance with this code.
Answered by: NeilE
Date published: 2016-02-01

I'm getting a white substance at the bottom of a glass when I use the ice maker, both crushed and cubed. I emptied the tray and washed it out. It did not help. Water alone is crystal clear. How do I get rid of it?

Asked by: Homeowner78
We regret the trouble you have experienced with this refrigerator. If there is some form of sediment in the water, then it is recommended to check the water filter, to see if it needs to be replaced. Otherwise, please contact our Customer Interactive Center at 800-243-0000.
Answered by: NeilE
Date published: 2016-01-20

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: 2016-01-04

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: 2015-12-27

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
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