this post was submitted on 21 Dec 2024
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It has nothing to do with how hard you smash the switch. It's the spring retainer mechanism. Over time, the spring weakens and won't retain the wire in place as well, making it prone to a poor electrical connection. Also, the location of the light switch can play a big role. A light switch by the front door of the house on an outside wall is significantly more prone to vibrations from the door opening and closing and temperature fluctuations. This, in turn, accelerates the spring loosing it's strength.
Especially with the hearing of current passing through.
I'd like to ask the developer of these things what happens to a spring that is repeatedly heated and cooled...