---
title: "Kenmore Washer F11 Error Code — Serial Communication Error"
description: "Kenmore Washer F11 Error — Serial Communication Failure The F11 error code indicates a serial communication breakdown between the main control board (CCU)…"
url: "https://kenmoreappliancesupport.com/error-codes/washer/f11/"
date_modified: "2026-04-08"
Appliance Type: "Washer"
---


# Kenmore Washer F11 Error Code — Serial Communication Error

## Kenmore Washer F11 Error — Serial Communication Failure

The **F11 error code** indicates a serial communication breakdown between the main control board (CCU) and the Motor Control Unit (MCU). Without this communication link, the washer cannot coordinate spin speed, agitation, and other motor functions.

## Diagnosis

- Perform a hard reset by unplugging for 10 minutes.
- Inspect the wiring harness between the CCU and MCU for damage, moisture, or loose connectors.
- Check both boards for signs of burning or moisture damage.
- Run the factory diagnostic cycle (consult your service manual for your specific model) to isolate which board is generating the communication fault.

## Board Replacement

F11 is often misdiagnosed — technicians without proper diagnostic tools frequently replace the wrong board. Our team uses factory-level diagnostic software to identify exactly which board (CCU or MCU) has failed before any parts are ordered. This saves time and money.

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