Faulty 3-Way Switch
I am having a problem with a 3-way switch in my house. The switches do not operate like 3-way switches should. One of the switches must be flipped up to be able to turn the light on with the other switch (I may not be describing this well, but I know this is not operating as a 3-way switch should).
The switches control the ceiling light in one bedroom. There are two switches about 10-12 feet apart. I just bought this house so I do not know how the wiring was done. I replaced each of the switches with new 3-way switches, however, this did not fix the problem.
I noticed that one of the switches had 3 wires (none were ground wires) and the other switch has 4 wires (none were ground wires). The switch with 4 wires had 2 wires connected to the same screw. This was on the side of the switch with 2 screws.