H33 — Interconnect error

What does H33 mean?

This error indicates a problem with the communication or connection between different parts of the system, likely between indoor and outdoor units.

• Interconnect cable is damaged or loose.
• Faulty control board in either unit.
• Signal interference.

Click steps to track your progress.

1. 1

   Check the interconnect cable and its connections.

2. 2

   Ensure no other electronic devices are causing interference.

3. 3

   Inspect control boards for visible damage.

4. 4

   Turn off the unit, unplug it, wait 30 seconds, and plug it back in to reset.