AC fan is on but no cold air coming out
I got a old model central AC (brand is York). It's been working fine until a couple days ago.
As I turn it on, the noise is not as loud as before. It feels like the blower in my attic is not working.
I checked the compressor unit outside the house, the compressor sweats a lot; the tubes linked to the compressor are ice-cold and they look like they have quite some frost on them. I guess the freon should be OK.
I also checked the capacitors (2 of them, one is bigger than the other). They are quite rusty but my multi-meter shows no discontinuity.
Thanks in advance.