Warning Signs of Defective Switches

If you've ever noticed that when you flip the switch on or off and there's a snap, crackle, or pop, then it's pretty clear that your switch is defective and it's time to replace it. In fact, switches will sizzle like a fine T-bone steak when the contact get really worn. Do you have worn out switches like these?

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Source: http://electrical.about.com/b/2013/12/27/warning-signs-of-defective-switches.htm

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