Using a voltage detector see picture below place it next to the terminals on the switch.
Troubleshooting wall light switch.
If the switch fails to operate the fan try pulling the fan chains first.
This can be caused by different events.
Diagnosing light switch problems if the light switch isn t working at all there may be no power to the circuit.
You might notice this type of issue if the light bulb flickers while turned on.
If insulation is packed too tightly around the light fixture it may be trapping heat around the light fixture canister.
Flipping the switch no longer turns the light on or off flipping the switch makes the light flicker but the light will not stay on or off the switch may work occasionally but you have to jiggle it back and forth several times to keep the light.
Do you have a light bulb that flickers at odd times.
There are several primary symptoms of switch failure.
Maybe when you walk by or touch the lamp.
This is the simplest solution you ll want to try first that may fix the issue.
See if there is voltage at one of the switch terminals.
Troubleshooting a single pole switch is fairly simple.
Make sure your voltage tester is working before you test the switch.
A wall switch provides electricity to the ceiling fan when in the on position.
If the fan still fails to operate and you.
This can be for one of several reasons.
Check to see if the lightbulbs in the light fixture have the proper wattage for the light fixture.
Insert the leads into a working electrical outlet.
Light fixture or wired device does not work.
With power on remove the cover from the switch and turn the switch off.
A third problem that might be blamed on the light switch can actually caused by the light fixture itself.
Troubleshooting and replacing a faulty switch is a project easily handled by most diyers provided you follow the proper safety guidelines and take your time making the proper connections to the new device.
A wire getting loose in a terminal screw or in a wire connector at the switch or light fixture could cause the flicker.
If the wattage is too.
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How to repair an electrical wall switch flickering light fixture.