Error H43 — Zone 1 sensor error

What does H43 mean?

A temperature sensor for Zone 1 is not functioning correctly, affecting temperature control in that area.

• Faulty Zone 1 temperature sensor.
• Wiring issue to the sensor.
• Sensor placement is incorrect.

Click steps to track your progress.

1. 1

   Check if the Zone 1 thermostat or sensor is clean and unobstructed.

2. 2

   Restart the system.

3. 3

   Ensure the sensor is correctly positioned according to installation guidelines.

4. 4

   Contact your installer to test and potentially replace the sensor.