H43 - Abnormal Zone 1 sensor

What does H43 mean?

This error indicates a problem with the water temperature Zone 1 sensor. It might be defective or disconnected, affecting temperature control for that specific zone.

• Water temperature Zone 1 sensor is defective
• Water temperature Zone 1 sensor is disconnected

Click steps to track your progress.

1. 1

   Note the H43 error code displayed on the control panel.

2. 2

   Turn off the power supply to the Panasonic Aquarea Heat Pump at the main circuit breaker. Wait for at least 5 minutes, then restore power.

3. 3

   If the H43 error code reappears, contact an authorized Panasonic service technician for diagnosis and repair of the Zone 1 sensor.