Thermostat shows E14 and indicates a humidity sensor error; humidity reading is missing or unrealistic.

Safety: No high‑voltage work is required. Do not attempt to clean the sensor with liquids.

• Ventilation: Ensure the thermostat is not installed in a bathroom or other area with extreme humidity swings.
• Dry out: If the area was recently very humid, allow the thermostat to dry for several hours with normal room ventilation.
• Power cycle and reset: Turn off power for 1 minute, then restore. If needed, perform a factory reset and reconfigure.
• Compare readings: Use a separate hygrometer to compare humidity. If the thermostat reading is far off or missing and E14 persists, the sensor is likely defective.
• Replace thermostat: The humidity sensor is integrated; replacement of the thermostat is typically required.