# How to Fix LG Error PE (Pressure Sensor Error)
The LG error code **PE** is a common troubleshooting issue indicating a malfunction related to the appliance’s ability to measure the correct water level.
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## 1. Explanation: What LG Error PE Means
The **PE** error stands for **Pressure Error**. This means your washing machine’s main control board is receiving an incorrect, erratic, or no signal from the **Pressure Switch** (also known as the Pressure Sensor).
The Pressure Switch is a critical safety component responsible for telling the machine exactly how much water is inside the tub.
**Why this matters:**
If the machine cannot accurately determine the water level, it will halt the cycle to prevent overflowing or to ensure it doesn’t try to run the motor without enough water to protect the inner drum.
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## 2. Step-by-Step Troubleshooting Guide
Before assuming the switch is defective, you must rule out clogs, kinks, and temporary electronic glitches. Follow these steps sequentially:
### Step 1: Perform a Hard Reset
Electronic errors can often be fixed by simply power-cycling the appliance.
1. **Unplug** the washing machine completely from the wall socket.
2. Wait a minimum of **5 minutes** to allow the main control board to fully discharge its residual power.
3. **Plug** the machine back in.
4. Attempt to run a short cycle (like “Rinse & Spin”) to see if the PE error returns.
### Step 2: Check the Pressure Hose (Air Tube)
The Pressure Switch works by measuring the air pressure inside a small tube that runs down to the bottom of the wash tub. If this tube is blocked or damaged, the sensor cannot take an accurate reading.
**(Note: This step requires access to the internal components. Ensure the machine is unplugged before proceeding.)**
1. **Locate the Switch:** The Pressure Switch is typically a small, round component, often located near the top rear of the machine, close to the control panel. You may need to remove the top access panel (usually held by 2-3 screws in the back).
2. **Inspect the Tube:** A small, clear, or light-colored plastic/rubber hose runs from the Pressure Switch down toward the wash tub.
3. **Check for Damage:** Look for visible kinks, cracks, or cuts in the hose. If damaged, it needs replacement.
4. **Check for Clogs:** Disconnect the hose from the switch (remembering which port it connects to). Gently blow air through the hose. You should hear the air bubble out inside the drum.
* If you encounter strong resistance, the hose or the air dome connection at the tub base is clogged with lint or soap residue. You may need a wire hanger or a flexible brush to clear the blockage.
### Step 3: Inspect the Air Dome Connection
If the hose is clear but the error persists, the blockage is likely where the hose connects to the bottom of the outer tub (the air dome).
1. If possible, visually inspect the base connection for debris.
2. If you found resistance when blowing through the tube in Step 2, you may need to use a small amount of pressurized air (carefully) to clear the soap scum buildup at the bottom connection.
### Step 4: Replace the Pressure Switch
If you have confirmed that the hose is clear, undamaged, and connected properly, the Pressure Switch itself has failed and needs replacement.
**Safety First: Always unplug the machine before attempting component replacement.**
1. **Locate the Switch:** Find the pressure switch (from Step 2).
2. **Label/Photograph Connections:** Note where all wires and the pressure hose connect to the switch.
3. **Remove the Old Switch:** It is usually held in place by a single screw or a plastic clip. Remove the screw or release the clip.
4. **Install the New Switch:** Connect the wires and the air hose to the new switch exactly as they were on the old unit. Secure the new switch in place.
5. **Test:** Reassemble the top panel, plug the machine back in, and run a test cycle. The PE error should now be resolved.
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## 3. Call to Action
If you have confirmed the hose is clear and the component is defective:
**Check the price for a replacement Pressure Switch here: https://www.amazon.com/s?k=LG+Pressure Switch&tag=trivian-20**