I have a 3 way switch in my home and garage to turn on and off the garage lights, I think I may have a wire on a wrong switch screw. When I come in the garage I can turn the lights on and when I come into the house I can turn them off, only problem is if I'm outside and try coming back in the garage the lights won't turn back on, I have to go back into the house and turn them on from there. Inside the house and garage I have my black hot wire on the black screw of the switch where it should be, could I be having this problem because I have the red and other black wire on the wrong screws, if I swap the red and black wire (blk going to my lights) around will this correct my problem?

[img]https://cimg8.ibsrv.net/gimg/www.doityourselft.com-vbulletin/1290x1814/f16a13bf_0ee8_4828_8304_875a32bd9dc4_935e345397d0e702f0c08207a1b7205e4c1a587c.jpeg[/img] Noticed icicles forming on roof where exhaust fan outlet is. Went to attic and found black mold in the area where the bathroom fan is. The exhaust pipe exits to roof six feet to left. Ideas on how to proceed?