# How to Fix Kenmore Error F71 (Interface Heartbeat)
The F71 error code is common on newer Kenmore washing machine models (especially those manufactured by Whirlpool/Sears). While disruptive, this error is highly specific and points directly to one main failure point.
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## Explanation: What Error F71 Means
The F71 error signifies an **“Interface Heartbeat”** failure.
In plain English, this means the main control board (the central processor, or the “brain” of the machine) is not receiving communication signals—the vital “heartbeat”—from the **User Interface Board (UI Board)**.
The UI Board is the panel located directly behind the console where you select cycles, press buttons, and see the display. When the main board cannot communicate with the UI board, the machine stops functioning.
**The likely culprit for F71 is a faulty User Interface Board.**
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## Step-by-Step Fix: Diagnosing and Resolving F71
Since the F71 error rarely indicates an issue with the Main Control Board itself, troubleshooting should focus entirely on the control panel assembly.
### Step 1: Perform a Hard Reset (Power Cycle)
Electronics often require a simple reboot to clear temporary glitches. This is the fastest and easiest attempt.
1. **Unplug:** Disconnect the washing machine from the power outlet.
2. **Wait:** Wait a full 5 minutes to allow all residual electrical charge to dissipate.
3. **Plug Back In:** Plug the washer back into the outlet.
4. **Test:** Attempt to start a cycle. If the F71 error returns immediately, proceed to Step 2.
### Step 2: Check Wiring Connections
You may need to pull the control panel apart to perform this inspection. *Always ensure the machine is unplugged before attempting disassembly.*
The main board and the UI board are typically connected by a **ribbon cable** (or wire harness). A loose or damaged connection can stop the “heartbeat” signal.
1. **Access the Console:** Remove the screws securing the back panel or top control panel (varies by model).
2. **Locate the Harness:** Trace the harness running from the UI board to the main board.
3. **Inspect Connections:** Carefully unplug and re-seat the connector at both ends. Look for any bent pins, corrosion, or damage to the ribbon cable itself.
*If the connection appears secure, the issue is almost certainly internal to the board.*
### Step 3: Inspect the User Interface Board for Damage
The UI board is exposed to humidity, heat, and potential spills, making it susceptible to failure.
1. **Examine the UI Board:** Look closely at the circuit board itself.
2. **Identify Damage:** Check for signs of moisture, burned resistors, visible corrosion, or blown capacitors. Even minor damage can prevent the board from sending the required heartbeat signal.
### Step 4: Component Replacement (The Solution)
If the hard reset failed (Step 1) and the connections look solid (Step 2), the User Interface Board has failed and must be replaced.
**Crucial Note:** When ordering the part, ensure you obtain the part number specific to your exact model number. Kenmore uses many similar-looking UI panels that are not interchangeable.
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### Call to Action
If you have confirmed that the connections are secure and the error persists, the User Interface Board needs replacement.
Check the price for a replacement User Interface Board here: https://www.amazon.com/s?k=Kenmore+User+Interface+Board&tag=trivian-20