Schaerer Coffee Machine Message: Grinder Left/Right Blocked
Grinder left/right blocked on a Schaerer Coffee Art Plus Touch means an object such as a stone is jammed in the left or right grinder, and beverage output is blocked. Check the grinder for a blockage, remove the remaining beans with a vacuum if necessary, then confirm. If the message stays, call for service.
Medium: the grinder stops and that side makes no drinks until the blockage is cleared.
- Code
- Grinder left/right blocked
- Maker
- Schaerer
- Equipment
- Super-automatic coffee
- Applies to
- Coffee Art Plus Touch (Model 040381-00090EUS)
What does Schaerer Grinder left/right blocked mean?
The grinder motor on each side turns burrs that crush the beans. If something hard enters the grinder, such as a stone mixed in with the beans, the burrs cannot turn freely, and the machine detects the blockage and stops that side. The display shows Grinder left/right blocked, and the beverage output is blocked. The manual's response is to check the grinder for a blockage and, if necessary, to remove the remaining beans with a vacuum, then confirm on the display. The vacuum helps you reach the object without scattering beans and without putting a hand into the grinder. If the object is cleared and the message returns, the grinder or its burrs may be damaged, and the manual says to call for service.
Affected models and control systems
Schaerer Coffee Art Plus Touch, model number 040381-00090EUS (SAP 1340900024); the message wording comes from the model's own manual.
Code numbers and their meaning can change between control generations. We match the full model and control before acting on a code.
What you may notice
- Grinder left/right blocked on the display
- Drinks from that side blocked
- Grinder motor straining or silent
- Hard rattling heard before the stop
Possible causes
Listed in Schaerer's documentation
- Object such as a stone jammed in the grinder
Other likely causes — what usually sits behind Grinder left/right blocked on this control. A technician confirms which one it is before any part is replaced.
- Foreign object that came in with the beans
- Burrs worn or chipped so beans jam
- Hopper contents contaminated with a screw or other hard debris
- Grinder motor weak under load
Safe checks before calling for service
- Switch the machine off before you reach near the grinder.
- Check the grinder for a blockage, and remove the remaining beans with a vacuum if necessary.
- Keep fingers out of the burr area.
- Switch the machine on and confirm on the display.
- If the message stays, note which side and what you found, and call for service.
How a technician diagnoses Grinder left/right blocked
- Confirm which grinder is blocked and remove the hopper contents.
- Inspect the burrs and the chamber for the jammed object and for damage.
- Clear and clean the grinder.
- Check that the burrs turn freely by hand with the power off.
- Test the grinder motor current and run.
- Replace the burrs or the motor if damaged.
- The burrs are sharp and the motor is powered, so clearing a jam is a cut and shock hazard.
- Judging burr wear needs the grinder taken apart.
- Motor current is measured on the live circuit.
How Grinder left/right blocked differs from similar codes
Grinder left/right no beans is the empty or stuck-bean message. This one is a hard object in the grinder.
Technical reference
- Maker documentation
- Schaerer owner support
- Edition
- User Manual | 03.2021 | v03 (Version 03 / March 2021)
- Models / control
- Coffee Art Plus Touch (Model 040381-00090EUS)
- Section
- Error Messages, pp. 23-24
- Checked
- October 2026
We use the maker's document to read the code and do not reproduce it. Always confirm the complete model and control before applying these steps.
Related Schaerer super-automatic coffee error codes
What causes a stone in the grinder?
It usually comes in with the beans. Check the bean bags and sieve if you see it often.
Is it safe to reach into the grinder?
No. Switch the machine off and use a vacuum, as the manual suggests.
What if the message persists?
The manual says to call for service.
Need help with Schaerer Grinder left/right blocked?
A technician confirms the cause on site and gives you the price in writing before any work starts.