E03 — HU Liquid Pipe Temperature sensor Abnormality

What does E03 mean?

This error indicates a problem with the liquid pipe temperature sensor in the Hydro Unit (HU). The sensor might be disconnected or have an electrical fault (open or short circuit).

• Loose or damaged wiring to the liquid pipe temperature sensor.
• A faulty liquid pipe temperature sensor.
• An intermittent electrical issue affecting sensor readings.

Click steps to track your progress.

1. 1

   Turn off the main power to the Haier unit at the circuit breaker.

2. 2

   Wait for at least 30 seconds.

3. 3

   Restore power to the unit and check if the error code clears.

4. 4

   If the error persists, contact a qualified service technician to inspect the sensor and its connections.