H2
Ebac Humidity Sensor Open Circuit

H2 code, unit indicates low humidity and will not run

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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

Broken RH sensor element, Disconnected sensor plug, Broken wire in sensor harness, Faulty main PCB input

How to Fix / Troubleshooting

Safety: Unplug the dehumidifier before accessing the sensor.

Steps:

  • 1. Check connector: Locate the humidity sensor and ensure its connector is fully seated on both the sensor and the main PCB.
  • 2. Inspect harness: Look for any visible breaks or cuts in the sensor cable. Flex the cable gently while watching for intermittent connection.
  • 3. Resistance test: Disconnect the sensor and measure resistance across its terminals. An open circuit (OL) indicates a failed sensor.
  • 4. Replace sensor/harness: Install a new humidity sensor assembly and harness as required.
  • 5. PCB check: If the new sensor still reads open, the PCB input may be damaged and the main control board will need replacement.
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Repair Difficulty

Medium 3/5

Required Part

Humidity Sensor Assembly
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