What does the Pe code mean? Washing machine pressure switch error

Published: 16 Feb 2021

An error on the LG washing machine display usually appears when the machine cannot perform some action. For example, draw, drain or heat water. But the PE error is a little different: it lights up immediately when you turn on the power or after pressing the Start button.

From the experience of the masters! For the first time, the PE code may light up at any stage of the LG washing machine program (wash, rinse or spin), but then this error invariably occurs when turned on.

What you can do yourself

You can restart the machine. There is a chance that the message popped up accidentally, and a one-time failure of the control unit is to blame. The code appeared when the module started the washing machine, but caught a “glitch” after a power surge. The SMA electronics are sensitive to such changes. How to remove the RE message:

• disconnect LG from the power supply;
• wait 15 minutes;
• turn it on again;
• check if the code is missing.

Rebooting didn't help, and the LG washing machine still gives an error message? This means the cause is broken and repairs are needed.

Repair

If this is the first time such a failure has appeared, you can try to deal with it yourself.

1. Disconnect the device from the power supply and wait 10 - 20 minutes. After that, plug the machine back into the outlet and check the result. Sometimes the problem lies not in the pressure switch, but in the control unit itself. If you reboot the system, the error may disappear. But, if it occurs constantly, and you have to turn the device off and on every time, it is better to call a technician and carry out diagnostics.
2. It is worth checking the wires that go to the pressure switch - if they are loose, they need to be carefully corrected, and the machine will work.
3. Check the water pressure - if it flows too slowly or, conversely, too quickly, this can lead to a failure in the system.
4. Sometimes water fills into the washing machine drum, and after a minute it immediately drains, after which an error code appears on the screen. This indicates that the drain is not installed correctly - if it is located below the drum level, the liquid will drain under the influence of gravity. In this case, you need to connect the device to the sewer correctly.

If these measures do not produce results, you need to call a specialist. Repair depends on the causes of the breakdown:

1. According to statistics, in 80% of cases the PE error occurs when the pressure switch breaks. Sometimes the problem lies in a blockage - in this case, it is enough for the technician to thoroughly clean or blow out the relay tube. If the pressure switch sensor is broken, it needs to be replaced.
2. If the error occurs due to a breakdown of the control unit, it will have to be replaced. In some cases, it is only necessary to replace the elements that are responsible for the operation of the water sensors. If the entire chip is damaged or melted, a new one must be installed.
3. Sometimes the problem is related to the cables and wires leading to the pressure switch - repair comes down to replacing them.

Most often, the technician can easily fix the problem. The repair price ranges from 1.5 to 6 thousand rubles. depending on the complexity of the breakdown and the cost of spare parts.

Possible breakdowns

Since the error is directly related to the level sensor, it is the main culprit of the problem. Additional reasons the technician cites are a malfunction of the control unit and damaged wiring.

Pressostat failed - from 2000 rubles*

The level sensor measures the amount of water in the tank and sends the result to the control module. It gives a signal to fill the water, run the program or drain the tank, depending on the stage of the wash. A faulty sensor does not respond to signals from the control unit or transmits incorrect data to it.

Types of pressure switch failures are:

• the pressure sampling chamber is clogged;
• the pressure switch hose has fallen off, become clogged or damaged;
• The sensor itself has broken down: most likely, the contact is stuck in the “full tank” position.

A failed level sensor is the main cause of PE error in LG machines.

HOW TO FIX

• The pressure sampling chamber (compression chamber) needs to be cleaned.
• Put the pressure switch tube back on, blow it out or replace it with a new one.
• If the sensor fails, the pressure switch is changed completely.

Faulty electronic controller - from RUB 2,300*

Most often, the relay switches in the level sensor generator on the board fail. The generator converts the pressure measurement into a frequency signal for the processor. If the generator fails, the exchange of information between the microprocessor and the pressure switch is lost, and the LG SMA generates a PE error.

The culprits may also be other burnt radio elements and damaged tracks in the pressure switch circuit in the controller. In a rare case, the microprocessor on the board burns out.

HOW TO FIX

It is necessary to replace damaged radio elements of the controller, restore the board tracks by soldering, or install a new module if the microprocessor fails.

Causes of malfunction

In the LG washing machine system, the PE error indicates that there are problems with the pressure switch (this is a relay that measures the water level in the drum). Often such a failure is associated with a breakdown of the pressure switch sensor; it can be replaced. But there are other reasons.

For example, with high pressure, water fills the drum too quickly. The opposite situation is also possible - the liquid is collected slowly, and the washing machine may react to this by completely stopping the cycle.

Sometimes the problem lies in the drain: water either flows out freely without stopping in the drum, or does not drain, accumulating to a dangerous level.

Do not forget about the electronic unit of the machine itself - in such a situation, a PE error in an LG washing machine occurs even if all the main spare parts are working properly.

What do the signals from an LG washing machine without a display mean?

If the washing machine is not equipped with a display, then errors appear on it in the form of a set of signals. The most common of them are described in the table:

What error codes mean for LG washing machines without a display, read here.

Error code 1E

Error code 1E indicates that water is leaking out through the walls of the tank. If liquid gets on the metal housing, the control unit will immediately stop the water supply to prevent the electric motor from flooding. Code 1E indicates two problems:

• Violation of the integrity of the tank walls - cracks, mechanical damage;
• Tank misalignment due to broken bearings or crosspieces.

In all these cases, replacement of components is required. Without new parts, the washing machine will not work normally.

In some cases, washing machine errors occur due to minor failures or improper user handling of the device (for example, uneven loading of laundry in the tub). However, in some cases it is necessary to change components. You can order high-quality, original parts for LG washing machines from the “Everything Spare Parts” online store. On our website you will find components for any LG models. We only sell parts from official dealers, all products are covered by a warranty.

Now let's figure out what you can do without calling a technician from the service center.

• If the problem is in the water pressure from the water supply, you can try opening the filler tap more or less, thereby adjusting the pressure.
• If a program failure occurs, immediately unplug the washing machine, wait 10–15 minutes and reconnect it to the electrical outlet.
• The pressure switch may not work due to a simple blockage in the tube. In this case, it will be enough for you to blow it out.
• You can correct the connections of the wire loops connecting the water level sensor. If suddenly you see that the wires are broken for some reason, you can connect them by twisting.

ATTENTION! The washing machine must be disconnected from the electrical network! Don't forget to insulate the connection with heat shrink!

• And, of course, you should check the correct installation of the washing machine, or more precisely, the location of the drain.

If you encounter any difficulties in eliminating the PE error yourself, you can always contact a specialist.”

Thus, we systematize the signs and causes of occurrence and methods for eliminating the PE error in a table.

If it is impossible to eliminate the PE error yourself and professional repairs are necessary, just call a specialist

Specialists will definitely contact you to save your LG “assistant”: they will arrive at the appointed time, find out the cause of the malfunction and, if necessary, offer and provide repair services.

Washing machine repair works daily from 8:00 to 24:00.

IE Error Code

IE are LG error codes indicating problems with water filling. On models without a display, you will see all the lights on at the same time. If the water does not fill the drum within the set time, the machine will drain the water and issue the corresponding code. The reasons may be the following:

• Clogged inlet hose;
• Damage to the hose;
• The filter has become unusable.

If the inlet hose is clogged, it can be cleaned. However, if it is damaged or the filter is already worn out, then it is necessary to dismantle them and buy new parts. This repair is also quite simple.

PE error - in what cases can you fix it yourself?

• If the error occurs for the first time, try unplugging the machine from the power supply for 10 - 15 minutes, and then plugging it back in. It is quite possible that there was a failure in the control module - the brains of the LG machine, and a reboot will help get rid of it.
• If the washing machine fills and immediately drains water, and then issues a PE code, then the reason may be incorrect installation. The drain is located below the level of the machine's tank, so the water flows by gravity into the sewer, and an error appears. Connect the washing machine to the sewer correctly yourself or use the washing machine installation service from RemBytTech.
• Check the connections of the wire loops going to the pressure switch. Perhaps they have moved away and need to be corrected.

If the above tips did not help fix the PE error, then a breakdown has occurred and your LG washing machine requires professional repair.