Dacor Coffee Machine GRIND-JAM Error: Grinder blocked
This dacor coffee machine grind-jam error code guide explains what this fault means for your Dacor appliance and how to respond safely. What GRIND-JAM Means on the Dacor CM24 The GRIND-JAM code on the Dacor CM24 built-in coffee machine indicates the internal burr grinder has stalled. The machine monitors grinder motor current and rotation speed. […]
~40%
DIY Fixable
From $200
Typical Repair Cost
30-60 min
Pro Repair Time
Quick Assessment
Answer to continue safely
Is it safe to keep using?
No. A jammed grinder can overheat the motor. Do not attempt to grind more beans until cleared.
Can I reset the code?
Yes. Removing beans, cleaning the grinder chamber, and restarting often resolves GRIND-JAM.
When to stop immediately?
Stop if you notice: GRIND-JAM persists after hopper is emptied and machine is restarted, Burning smell detected from the grinder area suggesting motor stress.
Symptoms You May Notice
Loud grinding noise followed by silence
The grinder starts with normal sound, then emits a harsh scraping or clicking noise before stopping completely. The brew cycle cannot proceed without ground coffee.
Machine attempts to brew but dispenses only water
The CM24 runs through the brew cycle but the cup fills with clear or very lightly colored water because no coffee grounds reached the brew chamber.
GRIND-JAM appears and the grinder motor stops
The display shows GRIND-JAM and the grinder motor shuts off to protect itself from overload. Pressing any brew button results in the same error until cleared.
Coffee tastes weak or flavorless
Before a complete jam, a partial blockage causes inconsistent dosing — some shots get a full dose of grounds while others get very little, producing thin, flavorless coffee.
Possible Causes
Foreign object in the grinder
A small stone, twig, or piece of packaging that was mixed in with the coffee beans has wedged between the ceramic or steel burrs, stalling the grinder motor.
DIY PossibleOily bean residue buildup on burrs
Dark-roasted or oily beans have left a thick residue coating on the burr surfaces, causing grounds to clump and pack between the burrs instead of flowing through.
DIY PossibleGrind setting too fine for the bean type
The grind adjustment is set to an extremely fine position, causing the burrs to produce powder-fine grounds that compact and block the chute between the grinder and brew chamber.
DIY PossibleSafe Checks You Can Do
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1
Clear the bean hopper and inspect for debris
Turn off the machine. Remove the bean hopper lid and scoop out all remaining beans. Look into the grinder throat with a flashlight for any visible foreign objects like stones or packaging fragments.
Small stones are often the same size and color as coffee beans. Feel through the beans by hand before refilling.
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2
Vacuum the grinder chute
With the machine off and unplugged, use a vacuum cleaner with a narrow nozzle attachment to suction out compacted grounds from the grinder outlet chute and the path to the brew chamber.
On the CM24, the grinder chute exits at the top of the brew unit compartment. Clear from both ends for best results.
Tools required -
3
Adjust grind setting coarser
Move the grind adjustment dial 2 to 3 positions coarser from its current setting. Run a test brew to see if the grinder operates without jamming. Fine-tune back gradually.
If you recently switched to a darker, oilier bean, a coarser setting is often needed. Very oily beans can clog even a properly maintained grinder.
When to Call a Professional
Contact a qualified technician if:
- Foreign object is visible but cannot be safely retrieved without disassembly
- Burr surfaces show visible wear grooves or chipping
- Grinder motor does not spin freely when tested by a technician
Need Professional Help?
Find qualified technicians in your area for proper diagnostics and repair.
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