What Does Error Code PS Mean on an LG Washing Machine?

LG Updated 28 March 2026
Quick Fix

Unplug the washing machine from the wall socket, wait 10 minutes to allow residual voltage to fully dissipate, then plug it back in and restart the cycle — this clears a transient voltage spike in the majority of PS error cases (takes about 10 minutes).

Fault description

Error code PS is LG's power surge protection alert. When the machine's control board detects that the voltage reaching the motor circuit has moved outside safe operating limits — either a sudden spike or an unexpected drop — it immediately halts the programme and displays PS to prevent damage to the motor and electronics.

You may notice the drum stops mid-cycle, the display freezes on PS, and the machine becomes unresponsive to button presses. In some cases the error appears at the very start of a cycle before the drum has even begun to turn. The machine is not broken at this point; it has done exactly what it is designed to do by cutting power to the motor.

The fault can originate from your home's electricity supply, from the machine's internal wiring, or from components in the motor circuit itself. Working through the checks below in order will help you identify which applies.

Causes

  • Transient voltage spike from the mains supply — A brief surge on your household electricity supply — caused by a nearby appliance switching on, a storm, or a grid fluctuation — can trigger the PS error even though nothing is physically wrong with the machine. This is the most common cause and usually clears after a power cycle.
  • Faulty or inadequate extension lead or socket — Washing machines draw high current during motor operation. Plugging into an overloaded extension lead, a worn socket, or a circuit shared with other high-draw appliances can cause the voltage at the machine to fluctuate enough to trigger PS.
  • Damaged or loose motor wiring harness — The wiring loom connecting the main control board to the motor can develop loose connectors or chafed insulation over time, particularly on machines with high spin speeds. Intermittent contact in this harness produces irregular voltage readings that the board interprets as a surge.
  • Failing motor or motor capacitor — A brushless DC motor that is beginning to fail, or a capacitor within the motor circuit that has degraded, can generate back-EMF spikes that the control board registers as abnormal voltage. This tends to produce a PS error consistently rather than intermittently.
  • Faulty main control board (PCB) — If the PCB's voltage-sensing circuitry develops a fault, it may report a surge error even when the supply and motor are both healthy. This is less common but should be considered if all other components check out correctly.

Step-by-Step Fix

  1. 1

    Perform a full power reset

    Switch the machine off at the programme dial, then unplug it completely from the wall socket. Leave it unplugged for at least 10 minutes — not just 30 seconds — to allow the capacitors on the control board to fully discharge. Plug back in, select a short cycle, and observe whether PS returns immediately or allows the drum to begin turning.

  2. 2

    Check the wall socket and plug directly

    Plug the machine directly into a dedicated wall socket rather than an extension lead or multi-socket adaptor. Inspect the plug's fuse — for a washing machine this should be a 13 A fuse — and replace it if it looks discoloured or blown. Try the machine on a different socket on a separate circuit if one is available.

  3. 3

    Check for other high-draw appliances on the same circuit

    Identify which other sockets share the same circuit breaker as your washing machine. If a tumble dryer, electric oven, or immersion heater is on the same ring, try running the washing machine with those appliances switched off. Voltage sag caused by shared load is a straightforward fix — your electrician can advise on dedicated circuit options if this is a recurring issue.

  4. 4

    Inspect the motor wiring harness connectors

    Disconnect the machine from the mains before doing this. Remove the rear panel (usually four screws) to access the motor. Locate the wiring harness connectors at both the motor end and the control board end, and press each connector firmly until it clicks. Look for any wires with cracked or melted insulation and note their position. Refit the panel, reconnect power, and test.

  5. 5

    Run a diagnostic cycle

    LG washing machines on these model series support a service diagnostic mode. With the machine powered on and the door closed, press and hold the Spin Speed and Soil Level buttons simultaneously for three seconds to enter the test programme. The machine will run through each function in sequence; if PS appears only during the motor spin phase, this points to the motor or its wiring rather than the supply.

  6. 6

    Test the motor and motor capacitor

    With the machine unplugged, disconnect the motor wiring harness and use a multimeter set to resistance (Ω) to test continuity across the motor terminals — refer to your model's wiring diagram for expected values. A reading of zero or infinite resistance where a mid-range value is expected indicates a motor fault. Capacitor testing requires a capacitance-capable meter; a capacitor that reads significantly below its rated value (printed on its casing) should be replaced.

  7. 7

    Inspect the main control board for visible damage

    With the machine unplugged, access the PCB (usually behind the top or front panel depending on your model). Look for burnt or discoloured areas, swollen capacitors, or corroded tracks. Any visible damage to the board means it will need to be replaced rather than repaired. If the board looks physically intact but PS persists after all other checks, the board's voltage-sensing circuit may have failed internally.

Affected models

When to call a service technician

Contact a service technician if the PS error returns immediately every time you power the machine on, if you can see burn marks or smell burning from the motor area or control board, or if your multimeter tests indicate a failed motor. These symptoms point to a component fault that requires specialist tools and replacement parts to resolve safely.

You should also call a technician if the error only appears on this machine and you have already confirmed the socket and supply are healthy — this pattern strongly suggests an internal electrical fault rather than a supply issue, and continued attempts to run the machine risk causing further damage to the PCB or motor windings.

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Frequently Asked Questions

Is it safe to keep using my LG washing machine after a PS error?

You should not continue running the machine until you have identified the cause. If the error was triggered by a one-off mains spike and clears after a power reset, it is generally safe to resume use. However, if PS appears repeatedly or is accompanied by burning smells or unusual noises, stop using the machine until it has been inspected — repeated voltage irregularities can damage the motor windings and PCB.

Why does my LG washing machine show PS only on high spin speeds?

The motor draws its highest current during fast spin cycles. If a component in the motor circuit — such as the capacitor, a winding, or a connector — is marginal rather than fully failed, it may only produce abnormal voltage readings under this peak load. This pattern is a useful diagnostic clue pointing toward the motor or its immediate wiring rather than the mains supply.

Can a power cut cause the PS error on an LG washing machine?

Yes. When mains power is restored after a cut, there is often a brief voltage spike as the supply stabilises. If the machine was mid-cycle when power was lost, this spike can trigger PS when power returns. A 10-minute power reset after a power cut is usually enough to clear it and allow the cycle to restart.

How much does it cost to fix an LG washing machine PS error?

If the fault clears with a power reset or a fuse replacement, the cost is negligible. A replacement motor wiring harness typically costs between £15 and £40 for parts. A new motor assembly for these LG models generally ranges from £80 to £150 for the part alone, with labour on top if fitted by a service technician. A replacement PCB is usually the most expensive option, often £100–£200 for the part.

Does the PS error affect all LG washing machine models or just certain ones?

The PS error code is specific to LG models that include motor circuit voltage monitoring, which covers the F-series direct drive models listed on this page. Other LG washing machines may display different codes for motor or electrical faults. Always cross-reference the error code with your specific model number to confirm the diagnosis.