LG Washing Machine PE Error Code | Understanding the Faults With the Pressure Switch System

LG Washing Machine PE Error Repair Guide: How to Fix a PE Error Code and Pressure Switch?

If you're seeing a PE error code on your LG washing machine's display, it means most likely there is a problem with the pressure switch.

In this guide, will walk you through how to test the pressure switch, explain the pressure switch system and how it works, and demonstrate how you can test the pressure switch without using a multimeter.

In the meantime, we would recommend you watch the whole video to learn how to fix a PE error code in detail.

Safety First!

• Unplug your washing machine before starting work.
• Organize screws and parts meticulously to avoid confusion during reassembly.

Understanding the Pressure Switch Fill System

Once a program is selected, the machine starts to fill with water. This water collects in the drum and starts to rise. At the bottom of the machine, you have a pressure bowl, which is either attached to the sump hose or directly to the drum. As the water rises inside the machine, the air inside this pressure bowl pressurizes, sending pressurized air up to the pressure switch.

How the Pressure Switch Works?

Older pressure switches were mechanical and had a set of points which opened and shut at a preset level. Newer pressure switches work on sending a frequency level in electric to the circuit board which is then able to detect the water level in the drum due to the frequency range. This is how they accurately measure the water level in machines.

Common Issues with Pressure Switches

Over time, these pressure bowls can block up with detergent and other debris that may be in the machine that hasn't dissolved and been pumped out. The tubes that connect up to the pressure switch sometimes get a perforation hole due to the machine's constant movement, causing a false reading to the pressure switch and therefore the machine may be overfilling.

Testing the Pressure Switch

Amazon affiliate link to multimeters

To test the pressure switch, you can use a multimeter across pins one and three. The proper way to test the machine is by using the diagnostic sequence.

If you don't have a multimeter, you can buy one from our affiliate link to Amazon for the multimeters (we win a little commission if you use this link it always helps our website):

We would recommend you watch our video on how to use a multimeter on washing machine pressure switches.

How to Enter Diagnostic Mode?

To enter diagnostic mode, you need to press the on/off button and then button two and four within one second. Once you're in the diagnostic mode, you can check the filling levels to understand if there are no problems with any of the other components.

As the water is entering the machine, our frequency level should be dropping, which indicates that the pressure switch is communicating with the circuit board. If the frequency level is not dropping, it means there is an issue.

Additionally Checking the Wiring Harness

Lastly, it's important to check the wiring to the circuit board. You can use the color coding system to trace the wires. While the wiring looms are usually encapsulated, ensuring continuity in all the wires can help eliminate potential problems. You should note that a PE error code is rarely caused by the circuit board; it's usually the pressure switch that's faulty.

If you need any parts for your LG washing machine, you can find them on our site.

If this guide was particularly helpful in diagnosing and fixing the PE error code on your LG washing machine, you can always donate to us by clicking on the Buy Paul a Beer page.

Related Video: https://www.youtube.com/watch?v=HnS87Tw4amM&t=0s

Complete Playlist on All LG Washing Machine Repairs: https://www.youtube.com/playlist?list=PLnAHZbSarsyHLR4x9XPIS-ZEsheufxm9Y