How to Diagnose and Repair Three-Way Switch Problems
Ask This Old House master electrician Scott Caron looks at a three-way switch issue and fixes the problem.
- Scott first gives an explanation of the three-way switch- two switches that control one light fixture.
- There are many ways that a three-way switch can be wired, but usually power or the light fixture connect to the load side of the switch and traveler wires run between traveler screws on both switches.
- In this case, the traveler wire and load wire were swapped and repairing the circuit involved switching them back.