H2
Camry Low Humidity Sensor Range Error / Sensor Open

Humidifier shows H2 and will not run, even in manual mode

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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

Disconnected humidity sensor, Broken sensor wires, Failed sensor electronics

How to Fix / Troubleshooting

Safety: Disconnect power before accessing the control panel or sensor wiring.

Steps:

  • 1. Inspect wiring: Remove the control panel cover and locate the humidity sensor harness. Check for loose or broken wires.
  • 2. Reseat connector: Unplug and reconnect the sensor connector on the PCB.
  • 3. Test sensor: If you have a multimeter and sensor specs, verify that the sensor output is not open-circuit. If it is, replace the sensor module.
  • 4. Replace sensor: Install a new Camry humidity sensor module and test operation.

Note: If a new sensor does not clear H2, the main PCB may have a fault in the sensor input circuit.

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Repair Difficulty

Medium 3/5

Required Part

Humidity Sensor Module
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