I have heard that yorkies are very hard to potty train, but Louis was potty trained (outside, no potty pads) by the time he was 16 weeks old. The best advice I can give is to take her outside every 45 mins. Keep her in a crate when you aren't watching her. Be consistent. Even if she takes a while outside, I agree with what the others said, just keep waiting until she goes. When I was potty training Louis every time I would take him outside, I would say "go pee" that way he eventually knew what I was talking about and wouldn't take forever sniffing around. Also, make sure you get a good carpet cleaning product, like Natures Miracle, and clean the spot really well to keep her from going in that spot again. Good luck, it takes a lot of patience, but I was able to get Louis potty trained during a blizzard!