# How to Fix Kenmore Washing Machine Error Code PF (Power Failure)
If your Kenmore washing machine suddenly stops mid-cycle and displays “PF,” the machine has detected a fault related to its power supply. While this issue might seem like an immediate, external electrical problem, a persistent PF code often points to a specific internal component failure.
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## 1. Explanation: What Does Error Code PF Mean?
The error code **PF** stands for **Power Failure**.
The machine logs this code whenever:
1. **The power is interrupted** (e.g., a momentary brownout, a tripped circuit breaker, or the cord was accidentally yanked out).
2. **The machine senses inconsistent, “dirty,” or unstable power.**
If you have already confirmed that your circuit breaker is fine and no other appliances are having issues, the problem is internal. In most Kenmore models, a persistent PF code is caused by the component responsible for conditioning the incoming power: **The Noise Filter Assembly.**
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## 2. Step-by-Step Fix: How to Diagnose the Noise Filter Assembly
Before attempting any diagnosis or repair, ensure the machine is completely **unplugged** from the wall outlet.
### Step 1: Initial Reset (The Quick Fix)
The PF code is often temporary. Perform a basic hard reset first:
1. **Unplug** the washer from the wall outlet.
2. Wait 5 minutes to ensure all residual charge dissipates from the control board.
3. **Plug** the washer back in and try running a short diagnostic cycle (like a Rinse/Spin cycle).
If the machine runs normally, the PF code was likely due to a minor external fluctuation. If the code reappears immediately or soon after starting the cycle, proceed to Step 2.
### Step 2: Access the Noise Filter Assembly
The Noise Filter Assembly (sometimes called the AC Line Filter or Line Noise Suppressor) is crucial because it filters out electrical interference (noise) that could damage the sensitive main control board (PCB). If this filter fails, the main board receives inconsistent power, triggering the PF error.
1. **Locate the Filter:** The filter is usually located near where the main power cord enters the appliance, often attached to the back panel or sometimes located behind the front console (depending on the model).
2. **Disconnect Power:** Ensure the machine is unplugged.
3. **Remove Access Panel:** Remove the necessary screws to access the internal components (usually the back panel or top console screws).
### Step 3: Inspect the Noise Filter for Damage
Once you have located the small, usually rectangular black box (the Noise Filter Assembly), visually inspect it. This component is prone to failure due to power surges or component wear (specifically the capacitors).
Look for these signs of failure:
* **Burn Marks:** Noticeable scorch marks, soot, or melting on the plastic housing or the terminals.
* **Bulging Capacitors:** If the filter uses capacitors, they may appear swollen or ruptured.
* **Loose or Corroded Wiring:** Check the connections going into and out of the filter for signs of rust or damage.
If the filter shows any visual sign of damage, or if the PF error persists after the hard reset, the Noise Filter Assembly is the likely culprit and must be replaced.
### Step 4: Installation of the New Filter
The Noise Filter Assembly is usually straightforward to replace, involving disconnecting the main power harness and grounding wire, unscrewing the old unit, and installing the replacement.
**Important Safety Note:** Take a clear photo of the existing wiring configuration before disconnecting the old filter. Wires must be connected precisely the same way on the new assembly.
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## 3. Replacement Component
Check the price for a replacement Noise Filter Assembly here: https://www.amazon.com/s?k=Kenmore+Noise Filter Assembly&tag=trivian-20