# How to Fix LG Error PF (Power Failure)
The LG Error Code “PF” is one of the most common service codes, often appearing confusingly *after* a power outage has already passed. This guide will help you understand what the code means and how to address the underlying cause, especially if the PF code appears frequently.
—
## 1. Explanation: What LG Error Code PF Means
The “PF” error code stands for **Power Failure**.
The machine displays this code when the main control board detects a sudden and unexpected interruption in the power supply. The machine pauses the cycle and logs the error, alerting you that the cycle was interrupted due to a loss of electricity.
### When the PF Code is Normal:
If you know your home experienced a blackout, brownout, or surge, the PF code is simply the machine reporting a legitimate power interruption.
### When the PF Code is a Symptom:
If the PF code appears repeatedly—especially if it appears mid-cycle, or immediately after pressing start, and you have not had a confirmed power outage—the likely culprit is a component inside the washer that is failing to regulate incoming electricity: **The Noise Filter Assembly.**
—
## 2. Step-by-Step Fix: Diagnosing the PF Error
Follow these steps from simplest to most mechanical to resolve the error.
### Step 1: The Standard Reset (Power Cycle)
If the PF code appeared due to a momentary flicker or known outage, the simplest solution is often a hard reset.
1. **Press the Power Button** to turn the unit off.
2. **Unplug the machine** from the wall outlet completely.
3. Wait at least **5 minutes** to allow the control board to completely discharge and clear its temporary memory.
4. **Plug the machine back in** and power it on.
5. Attempt to restart the cycle.
### Step 2: Check External Power Stability
If the PF code reappears, you must confirm the stability of the power source.
* **Check the Outlet:** Plug a different appliance (like a lamp or hair dryer) into the same outlet the washer uses. If the lamp flickers or fails, the issue is your home’s wiring, not the washer.
* **Check the Circuit Breaker:** Ensure the dedicated breaker for the laundry room has not partially tripped. If it feels loose or warm, reset it firmly.
* **Avoid Extension Cords:** Never run a modern, high-power washing machine on an extension cord, as this can cause resistance and voltage drops that the machine will interpret as a Power Failure.
### Step 3: Diagnose the Noise Filter Assembly
The Noise Filter (also called the Line Filter or EMI Filter) is a small component located near where the power cord enters the machine.
**Its Purpose:** The Noise Filter smooths out voltage spikes, fluctuations, and electromagnetic interference (EMI) before the power reaches the main control board.
**The Failure Point:** When the Noise Filter begins to fail, it intermittently interrupts the stable electrical supply to the main control board. The control board interprets this flicker as a sudden and complete “Power Failure,” triggering the PF code, even though the outlet voltage is fine.
#### If you suspect the Noise Filter:
1. **Look for Frequent/Immediate PF Codes:** If the PF code appears very quickly after starting a cycle, or during a seemingly stable period, the filter is highly suspect.
2. **Visual Inspection (Advanced):** If you are comfortable accessing the internal components (usually by removing the rear panel or top lid), visually inspect the noise filter. Look for signs of burning, charring, or melted plastic around the component. *If you attempt this, ensure the machine is completely unplugged first.*
3. **Replacement is the Solution:** Since the filter is inexpensive and easily accessible, replacing it is the standard fix if the above steps fail.
—
## 3. Call to Action
If you have confirmed stable power and the PF error persists, the Noise Filter Assembly likely needs replacement.
**Check the price for a replacement Noise Filter Assembly here: https://www.amazon.com/s?k=LG+Noise Filter Assembly&tag=trivian-20**