H72 — Tank sensor abnormal

What does H72 mean?

The sensor that monitors the temperature inside the hot water tank is not functioning correctly. This error triggers if the abnormality continues for 5 seconds.

• Hot water tank sensor is defective.
• Hot water tank sensor is disconnected.

Click steps to track your progress.

1. 1

   Turn off the power supply to the unit at the main breaker and wait 30 seconds before turning it back on.

2. 2

   Check the physical connection of the tank sensor for any signs of looseness or damage.

3. 3

   If the error persists, contact a qualified technician to inspect or replace the tank sensor.