E2
Venta
Humidity Sensor (RH Sensor) Fault
Venta digital humidifier shows E2 and stops humidifying
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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
Defective relative humidity sensor module, Contaminated humidity sensor from dust or cleaning chemicals, Loose sensor connector on main PCB, Failed humidity sensor input circuit on control board
How to Fix / Troubleshooting
Safety: Disconnect the humidifier from power before opening the housing.
- Reset the unit: Unplug for 5–10 minutes, then reconnect. Check if E2 clears.
- Check placement: Avoid placing the unit in direct steam, near a kitchen, or where it can be hit by aerosol sprays or fragrances. Chemical vapors can damage the RH sensor.
- Locate the humidity sensor: Remove the top cover per the manual. The RH sensor is typically a small plastic module or open PCB near the air outlet or intake, connected by a small harness to the main PCB.
- Inspect and clean: Ensure the sensor harness is fully seated. If there is visible dust, gently blow it off with dry air or use a soft brush. Do not use water or liquid cleaners on the sensor element.
- Test/replace: If E2 persists, the sensor element is likely out of calibration or failed. Replace the humidity sensor module with a Venta-compatible part. If a new sensor does not resolve the error, the main control PCB may need replacement.
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Repair Difficulty
Medium
3/5
Required Part
Humidity Sensor Module
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