To reset an LG refrigerator: Unplug (or trip breaker), wait 30 seconds to 5 minutes, restore power. Allow 24-48 hours for temperatures to stabilize. For hidden errors, press FREEZER + ICE PLUS for 1-2 seconds—“88 88” means no errors. Ice maker reset: press and hold TEST/FILL button for 3-5 seconds.
| Error Code | RESET |
|---|---|
| Meaning | Clears temporary errors and restores default operation |
| Difficulty | Easy |
| Time to Fix | 5-10 minutes (plus 24-48 hours stabilization) |
| Tools Needed | None required |
| DIY Fixable | Yes |
| Official Source | LG Support |
Resetting your LG refrigerator can clear temporary electronic glitches, error codes, and restore normal operation. This guide covers all reset methods including the hidden error check and diagnostic mode.
1. Standard Power Cycle Reset
The simplest and most common reset method.
- Unplug the refrigerator from the wall outlet
- OR turn off the circuit breaker
- Wait 30 seconds (basic reset) to 5 minutes (complete board reset)
- Restore power
- Wait 24-48 hours for temperatures to stabilize
What this clears: Temporary glitches, minor control errors, communication issues.
Important: After any power cycle, temperatures take time to stabilize. Don’t assume there’s a problem if temperatures fluctuate initially.
2. Control Panel Unlock
If buttons don’t respond, the control panel may be locked.
- Locate the LOCK button on the control panel
- Press and hold for 3 seconds
- Listen for a chime confirming unlock
- The lock icon should disappear from the display
Some models use LOCK + another button. Check your manual for model-specific combinations.
3. Hidden Error Code Check
LG refrigerators can store error codes that don’t display continuously. To check:
- Press FREEZER + ICE PLUS buttons simultaneously
- Hold for 1-2 seconds
- Read the display:
- “88 88” = No hidden errors
- Any other code = Stored error requiring attention
This helps identify intermittent problems that may not be actively displayed.
Run the hidden error check periodically even when your refrigerator seems fine. Catching errors early can prevent food spoilage.
4. Diagnostic Test Mode (Technician Mode)
Diagnostic mode runs component tests. Use cautiously—this is intended for technicians.
Entry: Press EXPRESS FREEZING + COLDER simultaneously
| Action | Result |
|---|---|
| Quick press | Test Mode 1: Compressor ON, freezer fan ON, damper OPEN |
| Hold 3 seconds | Test Mode 2: Damper CLOSED, display shows “2” |
| Hold 3+ seconds | Test Mode 3/Forced Defrost: Defrost heater ON, compressor OFF |
Exit diagnostic mode:
- Press the same buttons for 3 seconds
- OR unplug and replug (mandatory after using test mode)
Warning: Always exit diagnostic mode properly. Leaving it running can affect temperatures.
5. Ice Maker Reset
When the ice maker stops producing or behaves erratically:
- Locate the TEST/FILL button on the ice maker
- May be underneath the tray
- May be a pinhole requiring a paperclip
- Press and hold for 3-5 seconds
- The ice maker will cycle (you’ll hear motor sounds)
- Place a towel below to catch water/ice
Wait 24-36 hours after reset for ice production to resume normally.
6. Water Filter Indicator Reset
After replacing the water filter, reset the indicator:
- Locate the FILTER or RESET button
- Press and hold for 3-5 seconds
- The filter indicator light should turn off or change color
Some models require pressing the button through the filter door opening.
7. ThinQ Smart Diagnosis
For ThinQ-connected refrigerators, Smart Diagnosis transmits detailed diagnostic data.
Via ThinQ App
- Open ThinQ app on your phone
- Select your refrigerator
- Tap Smart Diagnosis
- Tap Get Started
- Follow prompts—view detailed report
Via Phone Call (No Wi-Fi Required)
- Call LG at 1-800-243-0000
- Press the LOCK button on your refrigerator
- Open the refrigerator door
- Place phone mouthpiece against the upper right speaker hole inside the door
- Press and hold FREEZER button for 3+ seconds
- Keep phone in position while tones transmit
- Agent receives diagnostic data and provides analysis
Quick Reference Table
| Reset Type | Method | Use When |
|---|---|---|
| Power cycle | Unplug 30 sec - 5 min | First attempt for any issue |
| Control unlock | Hold LOCK 3 sec | Buttons not responding |
| Hidden errors | FREEZER + ICE PLUS 1-2 sec | Check for stored codes |
| Diagnostic mode | EXPRESS FREEZING + COLDER | Component testing |
| Ice maker | TEST/FILL 3-5 sec | Ice maker issues |
| Filter indicator | FILTER/RESET 3-5 sec | After filter replacement |
| Smart Diagnosis | ThinQ app or phone | Detailed analysis |
Temperature Stabilization
After any reset, temperatures fluctuate before stabilizing:
| Time After Reset | Expected Behavior |
|---|---|
| 0-4 hours | Temperatures fluctuating |
| 4-12 hours | Temperatures approaching target |
| 12-24 hours | Temperatures near target |
| 24-48 hours | Fully stabilized |
Don’t add large amounts of food until temperatures stabilize. A full refrigerator takes longer to cool than an empty one.
Model Coverage
These reset procedures apply to all LG refrigerators:
- French Door: LRMVS, LRMVC, LRFXS series
- Side-by-Side: LRSXS, LRSVS series
- InstaView: All models
- Bottom/Top Freezer: Various models
Button locations and combinations may vary by model—check your owner’s manual for specifics.
When Reset Doesn’t Work
Contact LG support (1-800-243-0000) if:
- Error codes return immediately after reset
- Refrigerator won’t power on after reset
- Temperatures don’t stabilize within 48 hours
- Multiple errors appear
- You hear unusual sounds (clicking, grinding)
Sources
For official LG support: