Did you try driving with the fan speed control set to OFF? I was looking in my manual, and that was one of the suggestions.
I have a service manual with some other things to look for, but I'm guessing that your dealership will have the answer before we do. I imagine they might have to reset something to get rid of that yellow fault light you now have.
You might want to try posting a link to this in the Civic I section of the forums. It's kind of hiding here in the Insight section where fewer people are likely to read it.

If you're not part of the solution, you're part of the precipitate.