LG Ps
Power Supply Error
Medium severityVerified Diagnostic Guide
SeverityMedium
What Your Machine Is Actually Telling You
Ps means the power sensing circuit detected voltage outside the normal operating range. LG washers expect 110-130V (North America) or 220-240V (elsewhere).
Common causes:
1. Extension cord (25%) — voltage drop across thin wire.
2. Overloaded circuit (20%) — sharing with other appliances.
3. Loose outlet (15%) — poor contact.
4. Utility fluctuation (15%) — brownout.
5. Power cord damage (10%) — washer cord issue.
6. Internal power board (10%) — voltage regulation.
7. Wrong voltage (5%) — wrong circuit.
Common causes:
1. Extension cord (25%) — voltage drop across thin wire.
2. Overloaded circuit (20%) — sharing with other appliances.
3. Loose outlet (15%) — poor contact.
4. Utility fluctuation (15%) — brownout.
5. Power cord damage (10%) — washer cord issue.
6. Internal power board (10%) — voltage regulation.
7. Wrong voltage (5%) — wrong circuit.
What You're Probably Seeing Right Now
- Ps during spin or heating — peak demand.
- Machine on extension cord or power strip.
- Lights flicker when washer runs.
- Ps is intermittent — peak usage hours.
DIY Fix — From Easiest to Hardest
1
Plug Directly Into Wall (Fixes 25%)
1. Remove extension cord or power strip.
2. Plug directly into wall outlet.
3. LG needs a **dedicated 15-20A circuit.**
2. Plug directly into wall outlet.
3. LG needs a **dedicated 15-20A circuit.**
2
Check Outlet (2 minutes)
1. If plug is loose: outlet contacts worn.
2. Replace outlet ($5-10).
3. Verify outlet is grounded.
2. Replace outlet ($5-10).
3. Verify outlet is grounded.
3
Test Voltage (2 minutes)
1. Multimeter on AC volts.
2. Probe outlet.
3. Should read 110-130V (NA) or 220-240V.
4. Below/above = voltage problem.
2. Probe outlet.
3. Should read 110-130V (NA) or 220-240V.
4. Below/above = voltage problem.
4
Check Circuit Load
1. Find washer's breaker.
2. Turn off other items on that circuit.
3. Test washer alone.
4. Ideally: dedicated circuit.
2. Turn off other items on that circuit.
3. Test washer alone.
4. Ideally: dedicated circuit.
5
Install Surge Protector
After fixing:
1. Use appliance-rated surge protector with AVR.
2. Not a cheap power strip.
3. Protects against future voltage issues.
1. Use appliance-rated surge protector with AVR.
2. Not a cheap power strip.
3. Protects against future voltage issues.
When to Call a Pro
- •Dedicated circuit — electrician: $150-$400.
- •Internal power board — $150-$350.
- •Consistent overvoltage — fire risk.
What It'll Cost You
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Frequently Asked Questions: Error Ps
What does error code Ps mean on a LG washing machine?
Input voltage is irregular.
What usually causes the LG Ps error?
The primary cause is: Power cord connection is loose or house voltage is fluctuating.. It may also be caused by temporary sensor misreadings or wiring connection issues.
How do I reset and clear error Ps?
Ensure reliable power source. Avoid multi-way adapters. If the error persists, unplug the washer from electrical power for 10 minutes to perform a complete logic board reset.
Is it safe to continue using the machine with error Ps?
This code has a Medium severity level. While the machine might run, resolving the issue early prevents long-term wear on internal parts.