Ariston EMI / Electrical Noise from Motor or Driver

Humidifier or dehumidifier mode produces noticeable electrical interference (e.g., affecting radios nearby)

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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

Failing fan motor brushes (on brushed motors), Faulty suppression capacitor, Poor grounding, Defective main control board

How to Fix / Troubleshooting

Safety: Unplug before inspection.

Steps:

  • 1. Relocate sensitive devices: Move radios or audio equipment further away as a quick test.
  • 2. Inspect suppression components: On the main PCB, check EMI filters and capacitors for damage. Replace the EMI filter module or board if burnt.
  • 3. Check grounding: Ensure the power cord ground pin is intact and the outlet is properly grounded.
  • 4. Replace noisy components: If interference coincides with fan operation, replacing the fan motor may help. Persistent EMI issues may require main board replacement.
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Repair Difficulty

Hard 4/5

Required Part

EMI Filter Module
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