I replaced a flood light lightbulb in recessed light fixture, thinking the previous bulb had burned out, but that new bulb isn't working either. I've tried a regular lamp bulb to ensure my new floodlight bulb was actually "good" and I checked the fuse board to make sure that outlet hadn't been tripped. What other reasons would the light not turn on? the house is only 10 years old and there's no evident damage or anything wrong with the wiring in the recessed lighting.
Any number of things.
- Most recessed light fixtures contain what is called a thermal cutout. These cut off the power to the light when the heat from the light exceeds the temperature rating of the fixture. They go bad.
- Sockets go bad
- Switches go bad
- Loose wire connections inside the fixture.
- Loose wire connections behind the switch.
- Loose wire connections feeding the switch from another source.
- It is not uncommon for a wire staple to penetrate the wire and over time the wire burns up inside the wall.
Test the switch. If you don't have a meter, bypass the switch (line to load). If that doesn't work, you might have a short in a box.
More than likely thermal coupling is bad in fixture replace it or recessed fixture itself.