A9
De'Longhi Thermoblock Heating Failure

Machine displays A9 and does not heat water

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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

Open heating element in thermoblock, Faulty temperature sensor (NTC), Burned thermal fuse, Defective power board relay

How to Fix / Troubleshooting

Safety first: Turn OFF, unplug the machine, and allow it to cool completely. Do not open the machine unless you are qualified to work with mains voltage.

  • Power reset: After cooling, plug the machine back in and turn it ON. If the error reappears immediately and the machine does not heat, internal components are likely faulty.
  • User checks: There are no safe user-serviceable parts in the high-voltage heating circuit.
  • Service required: Contact an authorized De'Longhi service center. They will test the thermoblock, NTC sensor, thermal fuses, and power board and replace the defective component.
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Repair Difficulty

Professional Required 5/5

Required Part

Thermoblock Assembly
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