double light switch How to Troubleshoot a Faulty Wall Switch

by:Leimove     2019-05-28
double light switch How to Troubleshoot a Faulty Wall Switch
The moving part of the standard light switch is closed inside the plastic housing, so your only option when the switch is broken is to replace it.This is not a big difficulty because the switch is cheap.However, before you buy a new one, you need to know if the switch itself or the line is faulty.There may be a loose terminal connection on the switch, or a tripped GFI socket on the same circuit as the switch and its controlled lights.Before repair, make sure the wires on the switch are out of power to protect yourself.Pay attention to the symptoms of the faulty switch.If the light flashes or the light is dim, there may be loose connections on or inside the switch.However, the circuit power supply may turn off if the light is not turned on at all.Make sure the breaker that controls the switch is on, then look around the house for the GFI outlet that tripped and reset any outlet you find.This simple program can solve this problem.Once you are sure that the problem is inside the switch box, turn off the breaker and unscrew the cover plate with a screwdriver.Unscrew the switch and pull it out of the electric box with insulated pliers.Keep your hands and tools away from the terminal.Test terminals with a voltage tester.Touch one lead of the tester to the green ground screw and the other to one of the brass terminals.Verify that the lamp is left off or the meter reading is 0.Transfer the lead to another Brass terminal and it is safe to serve the switch if you still have no readings.Pull the two black wires attached to the switch to ensure they are firmly connected.If loose or pull it away, reconnect it to the terminal screw and tighten the screw.Twist the switch back to the electric box, open the circuit breaker and test it.Please replace the cover plate if it is valid.If the two black wires do not appear to be loose, disconnect them from the switch.Screw on the wire connector with pliers and screws.Open the circuit breaker.The switch may fail if the light is on.A new one.However, if the light flashes or does not continue when you bypass the switch, the problem is not the switch, but the connection is loose elsewhere in the circuit.If the wire is loosely connected, the arc may generate enough heat to melt the plastic housing of the switch.If so, please change the switch.Make sure the voltage tester is working properly before testing the switch.Plug the lead into a working power outlet and verify that you get the reading.
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