Dometic Harrier Remote Not Registering Prep

Use this when a Harrier air-conditioner remote does not register commands and owner notes are needed before support.

Owner-safe checklist

Record the Harrier model, remote model, battery state, display state, and whether line of sight changes behavior.
Try fresh batteries and normal remote pairing or control steps only.
Call qualified service if the remote and unit still do not communicate or the unit behaves unpredictably.