A4
De'Longhi Brew Group Positioning Error

Display shows A4 and machine will not operate

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Brew unit jammed by coffee residue, Misaligned brew group gears, Faulty brew group motor, Brew group position sensor failure

How to Fix / Troubleshooting

Safety first: Turn OFF, unplug the machine, and allow it to cool. Never force the brew group with power applied.

  • Remove brew group: Open the service door and carefully remove the infuser/brew group following the user manual. If it will not release, gently move the locking lever while pulling straight out—do not twist.
  • Clean thoroughly: Rinse the brew group under lukewarm water. Remove loose coffee grounds from the filter screens, piston, and channels. Do not use soap or detergents.
  • Lubricate: Lightly lubricate the brew group side rails and moving joints with food-grade silicone grease approved for coffee machines.
  • Clean interior: Use a soft brush or vacuum to remove coffee grounds from the brew group compartment and drive gear area.
  • Reinstall and reset: Reinsert the brew group until it clicks. Close the door, plug in the machine, and turn it ON. The machine should cycle the brew group to home position.
  • If A4 remains: The brew group motor, gear train, or position sensor may be defective. Internal disassembly is complex; contact an authorized De'Longhi service center.
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Repair Difficulty

Medium 3/5

Required Part

Brew Group Assembly
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