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31 cu. ft. Super Capacity 3-Door French Door Refrigerator w/Door-in-Door®

  • LFX31945ST

  • Stainless Steel

Key Features

  • 31 cu. ft. Capacity
  • 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. 

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 Tall Ice & Water 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
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® 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 2 out of 5 by from Lots of Room - Love the Extra Door I purchased the LFX31945ST on 12/31/2012. I have had to have it serviced twice already and I don't believe it still runs correctly. For the price, I expected a higher quality product. I also purchased a HE Top Loading LG Washer - WT5001CW. My 4 year extended warranty expired on 3/22/2016 - the washer expired on 5/22/2016. Again, not what I expected. I'm done with LG products.
Date published: 2016-05-24
Rated 5 out of 5 by from I can see! I can see everywhere in this refrigerator due to the great led lights. No more food gremlins hiding in dark places! Other than that, I am very pleased overall with the features of the product. Love the door- in- door! The bottom freezer has ample room as does the refrigerator section. My only criticism is that we couldn't get it without an icemaker/ water dispenser. We would have preferred the additional door shelf space.
Date published: 2016-05-17
Rated 5 out of 5 by from Super Unit I have had this fridge for almost two years and couldn't be happier with the performance. Loads of space and lots of ways to pack in food. I agree with the ice production being a bit slow and the water dispenser could use more pressure, but definitely would buy again.
Date published: 2016-05-17
Rated 2 out of 5 by from Makes a very loud popping noise when defrosting I bought this refrigerator a little over a year ago. My wife and I were very excited about the door in door feature and the convenience of it, but the noise it makes when it is in the defrost cycle is shocking. It is very loud and it makes this noise throughout the defrost cycle. You can hear from the far end of the house. I contacted LG when it was in warranty and they said that the noise was normal, but I can't believe the decibels this unit puts out is normal. It sounds like a train wreck.
Date published: 2016-05-16
Rated 5 out of 5 by from Love this fridge Only thing with this, if you use a lot of ice you will want to supplement, doesn't make it fast, and water comes out in a smaller stream otherwise I love it!!
Date published: 2016-04-24
Rated 5 out of 5 by from great Refridge this refrigerator is one of the best i've every owned, the space fits my 6 kid household. Also the features are great. the smart technology on it is super. this item has made life much easier in my household. it empress so that we went out and bought the stove microwave dishwasher washer and dryer, when they LG stands for (Lifes good) it really is now. Thanks LG
Date published: 2016-04-07
Rated 1 out of 5 by from Breaks Down Frequently Bought this in November 2013 and it has has the motherboard replaced once (August 2015) and are awaiting service again - March 2016
Date published: 2016-03-16
Rated 5 out of 5 by from LG makes the best refrigerators! This is my second LG refrigerator and both have exceeded my expectations. Lot's of space, easy to see everything, runs quietly and has terrific features like in door ice and water. The new door within a door is great as well for frequently accessed foods or if you have a "looker" that leaves the door open for long periods of time. Go LG refrigerators!
Date published: 2016-02-18
  • 2016-05-30T13:36CST
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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.

We have been getting a ER FF led msg on panel. What does that mean?

Asked by: Nwebr
Hello , The code generally indicates possible freezer fan repair however you can feel free to call our customer service line for further assistance at 877-543-8325
Answered by: NeilE
Date published: 2016-05-18

Ice is forming on food in frig. Moved temp to 40 from 37. What else should we do?

Asked by: Colby4us
We regret the trouble you have experienced with this refrigerator. It is difficult to determine the cause of this problem with the information provided. Please contact our Customer Interactive Center at 800-243-0000 for further assistance.
Answered by: ShenaS
Date published: 2016-05-03

Er in the refrigerator led and If in the freezer led on the left front door. What's up?

Asked by: LG Jeff
The ER IF code is indicative of a problem with the Icemaker Fan or its motor. This can potentially be resolved by allowing the refrigerator to thaw for about 4 hours, and then reconnecting it. If it does not, then the unit will likely 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: ShenaS
Date published: 2016-04-28

Where can you buy the plastic bottom shelf thing for the inside refrigerator it's the super capacity 3 door French door refrigerator with door in door stainless steel 

Asked by: Mocha432
Parts and accessories can be obtained through our parts distributor, MCM Electronics. Their contact number, for placing orders and pricing information, is 800-824-9491. You can also use their website, at
Answered by: NeilE
Date published: 2016-04-07

The ice maker is not dumping ice. Also the ice cream is not frozen

Asked by: Bunkoden
We regret the trouble you have experienced with this refrigerator. It is suggested to contact our Customer Interactive Center at 800-243-0000 that we might run the Smart Diagnosis function.
Answered by: ShenaS
Date published: 2016-03-16

What should the freezer setting be used

Asked by: JDKC1219
It is recommended that, when the unit is first installed, the freezer temperature should be set to 0 degrees Fahrenheit, while the refrigerator should be set to 37 degrees. Once the unit reaches these temperatures, you may change the setting to however you would prefer.
Answered by: NeilE
Date published: 2016-03-01

Bought this about a month ago. All the sudden the fridge will not stop beeping. I am not sure why but the doors are all shut and everything is cold. any help would be great.

Asked by: xman2yman
We regret the inconvenience you have experienced. Generally, the only beep in this system would be related to the doors being open to some extent. If this is not the case, 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: 2016-03-01

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
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