can i have a bit more details... im not very smart in cars... what is this thing u mention? what would i change and where is it locateD?

ummmmmmmm any answer??

Fuses are perfect, and no, no lights are even on.

It's the AC FAN, heater, regular fan, everything, no fan blows in my face anymore, its completely dead.

Ok my dad's crappy Volvo has so many problems.... but now the latest problem is the FANS wont turn on???? Idk why?? He just got battery changed... also this car already needs a new Catalytic Converter..... is it related?? But the thing is the FANS just stopped working..... Any help? Thanks