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LG PS

LG Dryer Error PS: Power Supply Voltage Problem

Clear meaning, realistic next steps, and safe guidance without turning the page into a long repair manual.

What it means

The dryer has detected that the incoming power supply voltage is outside its acceptable operating range. The voltage is either too high, too low, or fluctuating in a way that could damage the electronics or heating system.

Severity

Medium - some user checks may help, but repeated faults often need service.

Can you fix it yourself?

Partial — start with DIY steps

Most likely cause

Dryer sharing a circuit with other high-draw appliances causing voltage sag

Estimated time for safe first checks: 5–10 min to check circuit; Electrician visit if wiring fault.

Step-by-Step DIY Fix Guide

  1. SAFETY: Unplug the dryer.
  2. Confirm the dryer is plugged directly into the wall outlet — not through an extension cord or power strip.
  3. Confirm no other large appliances share the same circuit as the dryer.
  4. Check the circuit breaker for the dryer — flip fully off, then fully on.
  5. Plug in and run a test cycle with no other large loads active.
  6. If PS appears only once and clears, a brief utility brownout is likely — no further action needed.
  7. If PS recurs, call a licensed electrician to measure the actual voltage at the outlet and verify circuit wiring.

If the code comes back

  • PS appears consistently on every cycle — circuit wiring issue requiring an electrician
  • Circuit breaker trips when the dryer runs — clear sign of overloaded or undersized circuit

What This Error Means

Error PS on your LG dryer means: The dryer has detected that the incoming power supply voltage is outside its acceptable operating range. The voltage is either too high, too low, or fluctuating in a way that could damage the electronics or heating system. The dryer's self-diagnostic system has detected this condition and stopped or paused the cycle.

The most frequent cause is dryer sharing a circuit with other high-draw appliances causing voltage sag. Work through the causes and fix steps below in order — many LG dryer errors are resolved without a service call.

Many cases of PS can be resolved by the homeowner. The steps below cover the full DIY checks — if they do not resolve the error, a technician is needed.

A dryer draws a large and variable current — up to 30 amps on 240V during the heating cycle. Sharing a circuit with other high-draw appliances causes voltage sag that triggers PS. LG dryers must be on a dedicated 240V / 30A circuit — this is a code requirement, not just a recommendation.

Most Likely Cause by Symptom

The LG dryer may stop, pause, or refuse to complete the cycle normally.

Likely cause: Dryer sharing a circuit with other high-draw appliances causing voltage sag

Check first: SAFETY: Unplug the dryer.

The warning may return immediately because the appliance is detecting an internal fault.

Likely cause: Extension cord or underrated power cord used to connect the dryer — voltage drop under high load

Check first: Confirm the dryer is plugged directly into the wall outlet — not through an extension cord or power strip.

Common Causes

  • Dryer sharing a circuit with other high-draw appliances causing voltage sag
  • Extension cord or underrated power cord used to connect the dryer — voltage drop under high load
  • Household utility voltage irregularity or brownout from the power company
  • Undersized wiring to the dryer outlet in older homes
  • Loose neutral connection at the main electrical panel or dryer outlet

What Not to Do

  • Do not use an extension cord with the dryer — it is both a safety risk and a cause of PS
  • Do not ignore recurring PS — sustained voltage irregularity damages the control board over time

Model and Display Variation Notes

Model-family notes

  • LG dryer display wording and code formats can vary by series.
  • If your model behaves differently, check the owner manual before trying any deeper maintenance step.

Display and panel differences

  • Panel wording can vary by series, so confirm the exact code pattern before buying parts.

Parts, Tools and Service Options

Service option

LG service visit if the warning returns after the basic checks are complete.

Manual and model check

Check your exact model and manual before ordering any LG dryer parts.

This section stays service-first because the page points more strongly toward support or professional repair than a routine parts purchase.

When Not to Keep Troubleshooting

PS appears consistently on every cycle — circuit wiring issue requiring an electrician

  • Circuit breaker trips when the dryer runs — clear sign of overloaded or undersized circuit

How to Prevent It Recurring

  • Ensure the dryer is on a dedicated 240V / 30A circuit — never share with other appliances
  • Have the dryer outlet inspected if the home is older than 20 years — wiring can degrade and connections can loosen over time

Related Error Codes

Extra notes

  • This page is based on LG support material and stays conservative where model-specific guidance may vary.
  • The goal is to help you identify safe first checks before you move into parts, service, or model-specific manual lookup.

Source and model notes

Last reviewed: 2026-04-08

Based on: Based on LG support material and edited into consumer-safe guidance for the exact code family on this page.

View LG US Official Support

Model coverage note: LG dryer code meanings can vary by series, control panel, and model family, so use this page as a safe starting point rather than a replacement for the model-specific manual.

Important: FixThisError is an independent guide, not the manufacturer. Use your model-specific manual when the panel wording or behavior differs.

Always disconnect power before inspecting appliances. If unsure, contact a licensed appliance technician.