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Appliance Fix Guide

LG Dishwasher error code

LG Dishwasher Error P4

Indicates the 'Night Care' cycle has been downloaded.

Indicates the 'Night Care' cycle has been downloaded.

EasyStart with 5-15 minutes of safe checks
Diagnose before buying a part
LG dishwasher repair guide for error P4
Error codeP4Dishwasher

Try these first

Start here before buying a part or taking the appliance apart.

  1. 1
    Indicates the 'Night Care' cycle has been downloaded

    Indicates the 'Night Care' cycle has been downloaded.

  2. 2
    This cycle takes longer but runs the wash

    This cycle takes longer but runs the wash pump at a lower speed to reduce noise.

  3. 3
    Ideal for running the dishwasher while sleeping

    Ideal for running the dishwasher while sleeping.

A quick explanation

What does P4 mean?

Indicates the 'Night Care' cycle has been downloaded.

The answer you came for

How to fix LG dishwasher error P4

Start with the safest checks and work from simple to technical.

  1. 1

    Indicates the 'Night Care' cycle has been downloaded

    Indicates the 'Night Care' cycle has been downloaded.

  2. 2

    This cycle takes longer but runs the wash

    This cycle takes longer but runs the wash pump at a lower speed to reduce noise.

  3. 3

    Ideal for running the dishwasher while sleeping

    Ideal for running the dishwasher while sleeping.

Read the additional checks from the current guide

How to Fix P4 Error Indicates the 'Night Care' cycle has been downloaded.No repair needed.This cycle takes longer but runs the wash pump at a lower speed to reduce noise.Ideal for running the dishwasher while sleeping.

If the code comes back

Do not keep replacing parts based only on the code. Repeat the safe checks above. If the fault remains, stop and arrange qualified service rather than ordering from the code alone.

Recommended part

Recommended part for this error code

No replacement part recommended for this code

The researched guidance for LG Dishwasher error P4 points to user-action and diagnostic steps above rather than a mapped replacement part. We will not invent a part or send you to an unrelated product.

Replacement options

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Make the money decision

Repair or replace calculator

Use the age and total repair estimate to get a simple comparison. This is guidance, not a guarantee.

Safety first

Disconnect power before opening panels or touching internal parts.

When to stop
  • Stop if you see burned wiring, melted connectors, water near electrical parts, or a gas smell.
  • Do not perform live-voltage testing unless you are trained and equipped for it.
  • Use the exact model manual or service information before replacing electronic controls.

Free quick sheet

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