HI
Whynter
High Humidity Indication or Sensor Out-of-Range High
Dehumidifier displays HI and may run continuously
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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
Actual room humidity extremely high, Humidity sensor contaminated or shorted, Sensor wiring fault, Control board misreading sensor
How to Fix / Troubleshooting
Safety first: Unplug the unit before accessing internal components.
Steps to resolve HI:
- Verify humidity: Use an external hygrometer to confirm if humidity is truly very high (>90%). If so, allow the unit to run; HI may be normal until humidity drops.
- Improve ventilation: Reduce moisture sources (open windows briefly, use exhaust fans in bathrooms/kitchens).
- Clean sensor area: If HI persists even in a dry room, clean the humidity sensor area with compressed air.
- Inspect wiring: Check the sensor harness and connector for damage or corrosion.
If HI remains stuck and readings do not change, the humidity sensor module likely needs replacement.
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Repair Difficulty
Medium
3/5
Required Part
Humidity Sensor
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