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Sorry for the delay in someone getting to your question. I just got home from my shop and noticed it was still on the board. What is the make and model of your A/C? What "black box" are you referring to here? The control module? Can you attach a photo of it to your post so I can tell what you are looking at? Get back to me with this information and I can help you sort this out. All follow ups are included in our fee.
10-4. I am on here most days and will watch for your post. Bookmark this and you can return to it any time. I will make a phone chat offer for you as well in case you think that would be more productive. Some of our customers prefer that. No time limits or on number of calls needed to rectify the problem.