Dyson Intermittent Misting / Thermal Cycling

Dyson humidifier stops producing mist but fan continues to run intermittently, then resumes later

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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

Transducer overheating and shutting down, Low water level at transducer surface, Partial blockage in water feed to transducer, Faulty thermal sensor near transducer

How to Fix / Troubleshooting

Safety first: Unplug the unit and allow it to cool before inspection.

  • 1. Check water level in base: Remove the tank and inspect the base reservoir. If water level is very low, ensure the tank is properly filled and seated.
  • 2. Descale transducer area: Clean the transducer and surrounding area with a vinegar-water solution to improve heat transfer and water contact.
  • 3. Ensure adequate ventilation: Clean vents and ensure the unit has enough clearance to avoid heat buildup.
  • 4. Monitor pattern: If misting always stops after a similar time and resumes after cooling, the transducer or its thermal sensor may be failing and require replacement.
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Repair Difficulty

Hard 4/5

Required Part

Ultrasonic Transducer Assembly
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