electrical
There are 2 white wires on one side, 1 red on top and 1 black on bottom on other side, there is no ground/green screw as it is very old. I transferred all the wires one from the old switch to their corresponding spot on the new switch, one by one (2 white wire on black screws, the other 2 wires on the brass).
The switch now works, but not the way it used to be. So I switched sides, and it's still the same. What did I do wrong? Can you please help?
Wiring diagram for Leviton PR180 3-Way Wall Mount Occupancy Sensor.
This is how a typical receptacle/switch combo is wired.
A combination GFCI/switch, is going to have a different terminal layout. First, the switch terminals are no longer on the device. Instead they're a couple wires shooting out of the device.
Next you'll notice a set of terminals labeled LINE, with a brass terminal on one side, and a silver on the other. There will be another set of brass/silver terminals, but these will be labeled LOAD (these are typically covered by a sticker).
When wiring the GFCI/switch combo, it will look something like this.
The challenge you'll face, is determining which black wire is "hot", and which is "switched".
Best Answer
Unlike most people, you correctly understood the importance of the black and brass screws with 4-way switches. You also correctly understood that you can swap travelers.
But just to confirm, make sure the 2 wires on the brass screws go into one cable or conduit, and the 2 wires on the black screws go into a different cable or conduit.
So I assume your problem is that the switch is "up" when it used to be "down". There are two ways to solve that.