“--” Code – Mode Conflict (Multi-Zone Systems Only)

Modified on Fri, 28 Mar at 12:52 PM

If you see two dashes (“--”) on your indoor unit’s display, it means the system is in Conflict Mode. This only applies to multi-zone units.

What It Means:

One indoor air handler is set to cooling, while another is set to heating—causing a conflict.

How to Fix It:

Make sure all indoor units are set to the same mode—either cooling or heating.

Once all units match, the “--” code will disappear and normal operation will resume.

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