We need to replace it as its bust basically.
Old style light switch wiring.
Bring old light fixtures wired with knob and tube wiring up to code by installing an electrical box in the plaster wall.
Conventional 3 way wiring is not very complex with conventional wiring the line line voltage connects to the common of one switch.
Probe the existing hole with a keyhole saw to find the horizontal edges of the lath.
We have a double switch for our bathroom that controls the extractor fan left switch of 2 and the bathroom lights right switch of 2.
Upgrading to a new rocker style switch takes just a few minutes and requires no extra wiring or special connections.
Methodically dealing with one wire at a time will help avoid confusion and mistakes.
Here s how to do it without breaking the plaster and lath.
Moiak light toggle switch retro single control switchs 6a round lamp switch mounted wall light button switch old fashioned toggle switch 6 26 6.
Fix old house wiring problems.
If the new switch s cover plate is smaller than the original you can make it easy on yourself and cover the old plate s outline with a slightly oversize new plate no wall repair or touch up paint required.