---
title: WMF 1100s - Blocked Grinder 
description: WMF 1100s - Blocked Grinder - Error Code 9516 / 9517
---

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# WMF 1100s - Blocked Grinder

## How to clear a blocked grinder - error code 9516 (left grinder) 9517 (right grinder)

Safety First

- **Switch off the machine:** Power down the coffee machine completely.
- **Disconnect power:** Unplug the mains plug from the electrical socket before touching any internal or mechanical components.
- **Never use bare fingers or metal tools:** Do not poke fingers or hard metal objects into the grinder mechanism to avoid injury or damage.<https://www.google.com/goto?url=CAESeAHrOzAV6Soi3pusfO4AmBoiTjJ0e1ElD-beQhQlKeG4GbDHOSN39NV-cuY6xSy5cs6L2nXHF08qoeoG4FGbJmuKXV21CTAwKohzey5pIbySkXkfuEe63NeN9ALhwpvp1NfGvZDjx6uD2PugSo1_UfClohwHQmzJ6Q>

---

Step-by-Step Instructions

1. **Access the Bean Hopper:** 
     - Remove the bean hopper cover from the top of the machine.
     - Empty all coffee beans out of the bean hopper.
     - Vacuum out any loose beans, chaff, or residual coffee grounds using a vacuum cleaner.
2. **Rotate the Grinder Disk:** 
     - Locate the official **multitool** designed for the hopper/grinder.
     - Insert the two pins of the multitool into the corresponding recesses on the grinder disk.
     - Rotate the grinder disk **counter-clockwise only** using the multitool to free jammed beans or foreign debris.
       
       ![Screenshot 2026-10-26 at 13.30.12](https://support.amamus.coffee/hs-fs/hubfs/Screenshot%202026-10-26%20at%2013.30.12.png?width=413&height=268&name=Screenshot%202026-10-26%20at%2013.30.12.png)
3. **Clean and Vacuum Out Residue:** 
     - Remove any dislodged beans or debris from the chamber.
     - Vacuum out the grinder area again thoroughly.
     - Check and clean out the brewing unit and grinder discharge path if accessible.
4. **Reassemble and Test:** 
     - Refill the bean hoppers with fresh coffee beans.
     - Replace the bean hopper cover securely.
     - Reconnect the mains plug and switch the coffee machine back on.
     - If problem persists please contact [Amamus Support Desk](https://amamus.coffee/support/) as an onsite visit maybe required.

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