when you pop of the fascia around the aircon you will notice that the red and blue sections, and also the plastic panel covering the display all have several small round dots of what looks like melted plastic rather than screws or clips (the plastic panel does 2 small clips, one either end as well as the melted dots)
you have 2 options, one is to melt those dots so that you can pull out the plastic panel and the red and blue bits, or you can do what i did, and use a sharp knife (stanley/stencil knife) to cleanly slice off the little plastic melted pieces which will then allow the plastic panel and red and blue pieces to simply pull out.
when you want to put it all back together, simply slide it back into place and use a tiny amount of super glue or something similar and just drip it onto the holes that the red and blue and plastic panels are held in from, dry in a few minutes and presto! you retained the colored parts of your aircon