2005 S60 2.5T AWD - No cabin heat

[MarcM]

I have no cabin heat. It has dual climate control. If I turn the temperature selector(s) from 64 > 84 and vice versa, I can hear what sounds like dampers moving. I was told the cabin climate temperature (fan) sender is potentially bad. Looking in the little vent I can see what looks like dust bunnies. How do I get the panel off to remove this sensor and check it over?
On a side note, in the overhead lights above dash, there is a similar little grille. What is that for?
I purchased a copy of VIDA 2014 from sleazebay that came in today, but the discs are junk (awaiting customer service response), otherwise I wouldn't be asking.

[MarcM]

Found information here on the site. Picked the lint ball ever-so-carefully out with a 1.4mm jewelers screwdriver, avoiding the thermistor. I'm sorry, but if you use a high-volume vacuum cleaner, you're asking for it to suck that puppy out. Not up for a $150 sender assy. We'll see tomorrow.

On the flip side, the previous owner had fine white hair and favored beige clothing.