One switch does nothing
A homeowner says the light only responds to one of the two switches.
Reported symptom: The light only works from the upstairs switch. The downstairs switch does nothing at all.
Tap a terminal, then tap a second terminal to run a wire between them. Tap either terminal of an existing wire (or the wire itself) to remove it.
Switch 1 (Downstairs):
Switch 2 (Upstairs):
| Switch 1 (Downstairs) | Switch 2 (Upstairs) | Light |
|---|---|---|
| up | up | on |
| up | down | off |
| down | up | on |
| down | down | off |
Only Switch 2 (Upstairs) controls the light — Switch 1 (Downstairs) does nothing.