Grindmaster Coffee Grinder Troubleshooting
Grindmaster Coffee Grinder Troubleshooting

Grindmaster Coffee Grinder Troubleshooting

Grindmaster Coffee Grinder Troubleshooting Whether you run a small coffee shop or large cafe chain, a high-quality coffee grinder is essential. That’s why Grindmaster makes a wide selection of commercial units, ranging from standard grinder to systems that also brew coffee. After years of constant use, there might be some issues that pop up out of the blue. Luckily, we have easy tips for troubleshooting a Grindmaster coffee grinder.

Grindmaster Coffee Grinder Troubleshooting Solutions

The following are potential problems and remedies associated with 115, 250 and 800 series grinders as well as Grind’n Brew systems.

Click Issues Below to Read More:

  • Won’t Start When Button is Pushed
  • Runs or Hums Without Dispensing Coffee
  • Clogged Grinder Chute
  • Auger Not Turning or Operating
  • Circuit Breaker Trips Continuously”
  • Dispensed Coffee Quantity from Each Throw Isn’t Same
  • Noisy Grind Selector™ Operation

Won’t Start When Button is Pushed

  • No power – See if the main power switch is off or the machine in plugged into an outlet without power.
  • Tripped circuit – Reset the circuit breaker by pushing the reset button. You should hear a clicking noise that verifies the issue is resolved.
  • Bag or basket is out of position – On select models, make sure the bag is placed correctly underneath the spout. If the grinder uses a basket, align it properly.
  • Unchanged basket filter – If the basket filter hasn’t been changed, remove the basket and change it.

Runs or Hums Without Dispensing Coffee

  • Broken shear disc – When the shear disc breaks, it can prevent coffee from being made or dispensed. Contact an authorized technician to repair or replace it immediately.
  • Obstruction in the grinding chamber opening – Unplug the unit, and remove beans from hopper. Make sure to clean out any other blockages in or around the hopper as well.
  • Obstruction in auger assembly opening (dual-bean models only) – In select dual-bean units, see if there is something restricting the auger assembly. Like the opening of the grinder chamber, remove the hopper and clear any beans or obstructions.
  • Blown fuse on controller board (dual-bean models only) – Contact an authorized technician to check for a blown fuse on the controller board.

Clogged Grinder Chute

  • Air shutter fan not operating correctly – Check if the air shutter fan is working properly by removing the right side panel access plate. Have an authorized technician replace it if you notice significant damage.
  • Air shutter fan is backwards – Installing the fan backwards can hinder air flow and cause moisture to enter the grinder chute. Ensure it’s correct by seeing if the arrow is pointing toward the grind head, allowing air to face the brew funnel. If it’s incorrect, you should contact an authorized technician to correct the issue.

Auger Not Turning or Operating

  • Jammed auger – Look if any coffee beans or bean dust have jammed the auger. Unplug the machine, and clean the auger opening.
  • Binding motor or link – Have an authorized technician check if the alignment of the link or motor is correct or the motor-mounting screws are tightly fastened.
  • Loose wiring harness – The motor’s wiring harness could be loose. Contact an authorized technician to check and reconnect wires to the motor.
  • Burned out auger motor – When the auger’s motor burns out, have an authorized technician replace it immediately.
  • Hopper seated incorrectly (250RH models only) – If the hopper isn’t in the right position, that can affect the auger from turning or operating correctly. Have an authorized technician correct its seating.

Circuit Breaker Trips Continuously

  • Extension cord – An extension cord can cause insufficient amperage that trips the circuit breaker. Avoid using one, and plug the unit directly into a power outlet.
  • Overloaded line – An overloaded line also can supply inadequate amperage. Try to designate a single line for the unit, and avoid using a multi-outlet box.
  • Adjust grind settings – Incorrect grind settings can cause the circuit breaker to trip. Consult your owner’s manual to adjust to a coarser setting.

Dispensed Coffee Quantity from Each Throw Isn’t Same

  • Incorrect timer controller – Use a watch to see how long the grinder runs. Contact an authorized technician to replace the timer if it varies more than plus or minus 1 percent.
  • Timer delay is faulty or not running long enough – See how long the grinder runs. If the time is off, use your owner’s manual to adjust the timer properly.
  • Stalled auger – Please see “Auger Not Turning or Operating” section above for more troubleshooting instructions.

Noisy Grind Selector™ Operation

Issues are common with Grind Selector™ operation on 115AB and 250AB models.

  • Rumbling noise – Check the machine’s thrust bearing is rotating inside the flange bearing. If so, have an authorized technician replace the thrust bearing and sheer cap.
  • Grating noise – See if the burrs are touching each other on a fine-grind setting. Look in your owner’s manual for proper adjustments.
  • Chattering noise – When you hear a chattering or buzzing sound, the solenoid might have failed to seat or close fully. Check if the solenoid mounting screws are tight or if the solenoid and shift arm is aligned correctly.
  • Vibration noise – If there is a vibration sound when grinding occurs without Grind Selector™ activated, the cotter pin in the thumb screw’s linkage could be moving. Try to spread the cotter pin’s flanges or replace the pin.

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