I've recently run into a problem and need some advice on my HVAC. A few weeks ago I noticed that sometimes nothing would happen when I'd put on the vent, A/C, etc. Sometimes it would work, sometimes it wouldn't. Other times when I had the vent, defogger, etc. on, it wouldn't work initially but if I left it on for long enough I might get some air after 10 mins or so. And at times if I went over a bump, the damn thing would start to work. Then a few days ago, everything HVAC related stopped worked (except the rear defogger obviously) - that is to say that nothing goes on. Initially I thought that perhaps this was due to a faulty switch, but when I turn on the A/C, I can still hear the compressor go on, but nothing comes out.
Since I'm not any kind of an expert at these types of things, I was wondering if anyone knew exactly what's wrong? I would assume that some sort of fan or something is broken. However, I don't even know where it would be located, how much it would cost to fix by myself or professionally, etc?
Anyone have any insight into this? Any advice would be appreciated.
Thanks!