LG Refrigerator LFX25978ST Manual

The LG LFX25978ST is a 25 cubic foot French Door Refrigerator with InstaView Door-in-Door, Smart Cooling Plus technology, Linear Compressor, Craft Ice maker, SmartThinQ connectivity, and ENERGY STAR certification. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

1. Features at a Glance 2. Installation 3. First-Time Setup 4. Specifications 5. Controls and Settings 6. Connecting to SmartThinQ 7. Using InstaView & Craft Ice 8. Care & Cleaning 9. Regulatory Information 10. Troubleshooting

Features at a Glance

Key components: French Door design, InstaView Door-in-Door panel, Craft Ice maker, Linear Compressor, Smart Cooling Plus system, SmartThinQ connectivity.

Feature	Description
InstaView Door-in-Door	Knock twice on glass panel to see inside without opening door
Craft Ice Maker	Makes slow-melting spherical ice
Linear Compressor	10-year warranty, energy efficient and quiet operation
Smart Cooling Plus	Multi-air flow and door cooling to maintain consistent temperature
SmartThinQ	Wi-Fi enabled for remote control and diagnostics via app
ENERGY STAR	Certified for energy efficiency
Door Alarm	Alerts if door is left open
Adjustable Shelves	Spill-proof tempered glass shelves
Fresh Air Filter	Reduces odors in refrigerator compartment
External Water & Ice Dispenser	Provides filtered water and ice through the door

Installation

Unpack and inspect contents. Ensure proper clearance and leveling.

Remove packaging: Take off all tape, foam, and protective film.
Position refrigerator: Allow at least 2 inches clearance on sides and back, 1 inch at top.
Level the unit: Adjust front leveling legs using a wrench.
Connect water line: For ice maker and water dispenser, connect to cold water supply (1/4" copper or plastic tubing recommended).
Plug into dedicated 115V, 15A grounded outlet.

WARNING! Refrigerator is heavy; use two people for moving. Do not install near heat sources.

First-Time Setup

Plug in refrigerator; allow 24 hours for cooling before adding food.

Set temperature: Default is 37°F for fridge, 0°F for freezer. Adjust via control panel.
Enable InstaView: Knock twice on Door-in-Door panel to activate light.
Start ice maker: Flush water line, press ice maker arm down to start cycle.
Connect SmartThinQ: Download app and follow on-screen instructions.
Set door alarm: Enable in settings if desired.

CAUTION! Do not overload shelves. Allow air circulation around food items.

Specifications

Model: LFX25978ST
Capacity: 25 cubic feet total (Refrigerator: 16.5 cu ft, Freezer: 8.5 cu ft)
Dimensions (HxWxD): 69.875" x 35.75" x 34.5"
Door Style: French Door with bottom freezer drawer
Ice Maker: Craft Ice (spherical) + standard cubed ice
Water Filter: LT1000P (replace every 6 months)
Compressor: Linear Compressor (10-year warranty)
Energy Use: 608 kWh/year (ENERGY STAR certified)
Finish: Stainless Steel
Weight: 330 lbs

Controls and Settings

Control Panel located on front dispenser area.

Buttons: TEMPERATURE (Fridge/Freezer), ICE TYPE (Craft/Cubed), WATER FILTER, LOCK, ALARM, SMARTTHINQ.

Temperature Settings: Fridge (34°F to 46°F), Freezer (-6°F to 8°F). Ice Options: Craft Ice or Cubed Ice. Filter Reset: Press and hold WATER FILTER for 3 seconds after replacement. Door Alarm: Enable/disable via ALARM button. Child Lock: Press and hold LOCK for 3 seconds.

Connecting to SmartThinQ

Allows remote monitoring and control via smartphone.

Download LG SmartThinQ app from App Store or Google Play.
Enable Wi-Fi on refrigerator (press SMARTTHINQ button).
Follow in-app instructions to connect to home network (2.4 GHz required).
Features: Adjust temperature, monitor filter status, run diagnostics, receive alerts.

Tip: Ensure refrigerator is within range of Wi-Fi router for stable connection.

Using InstaView & Craft Ice

InstaView: Knock twice on Door-in-Door panel to illuminate interior (light stays on for 10 seconds). Craft Ice: Makes 8-10 spherical ice balls per day.

Ensure water line connected and ice maker turned on.
Select ICE TYPE: Choose "Craft" for spherical ice, "Cubed" for traditional ice.
First batch may take 24 hours. Discard first few batches.
To dispense: Press glass against ice dispenser lever or use provided cups.
Clean ice maker: Follow instructions in Care section monthly.

WARNING! Do not use sharp objects to remove ice. Keep children away from dispenser area.

Care & Cleaning

Unplug before cleaning interior. Use mild detergent and warm water; avoid abrasives.

Exterior: Clean stainless steel with grain using damp cloth and LG-approved cleaner.
Interior: Remove shelves and drawers; wash with warm soapy water.
Condenser coils: Vacuum every 6 months (located at back or bottom).
Water filter: Replace LT1000P every 6 months or when indicator lights up.
Ice maker: Clean with vinegar solution monthly to prevent scaling.

CAUTION! Do not use harsh chemicals, boiling water, or steam cleaners.

Regulatory Information

FCC Compliance: This device complies with Part 15 of FCC Rules. UL Listed: Meets safety standards. ENERGY STAR Partner: LG is a partner in the EPA's program. For support, visit www.lg.com or contact LG Customer Service at 1-800-243-0000. Copyright © LG Electronics.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Refrigerator not cooling	Power/doors	Ensure plugged in; check circuit breaker; ensure doors fully closed.
Ice maker not working	Water supply/filter	Check water line connection; replace water filter; ensure ice maker arm is down.
Water dispenser slow	Filter/kink	Replace water filter; check for kinks in supply line.
InstaView not lighting	Power/knock	Ensure refrigerator is on; knock firmly twice on center of panel.
Loud noise	Leveling/fan	Level refrigerator; check for items touching back wall; ensure condenser fan is clear.
SmartThinQ not connecting	Wi-Fi/password	Ensure 2.4 GHz network; re-enter password; move closer to router.

Reset: Unplug for 5 minutes, then plug back in.

Service: 1-800-243-0000; www.lg.com