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Why Is My Bathroom Light Fixture Not Working?
©Copyright Dave Rongey - Summary:
How to Repair a Bathroom Light Circuit: The Most Common Problems with Bathroom Lights and How to Fix Them.
Guide to Fixing a Bathroom Light Fixture
Electrical Question: I have a 1975 townhouse, and as a single mom I find myself having to learn and do a lot of things by myself.
Bathroom Light Fixture Problem #1
- My daughter’s bathroom has both a fan and light switch (single-pole wall switch).
- The fan was not working so I thought I would replace the switch for the fan.
- I had forgot to turn off the power at the electrical panel and there was just a little spark–I know, Be Careful.
- Well now the fan works, but the light does not.
- The two slot receptacle (15 amps, 120 volts) works, but it also affected the light in my bathroom and the GFCI receptacle.
- I have aluminum wiring and if there is a overload it trips, but I know it is not the fuse because everything else is working.
- I have been researching I think it has to do with the GFCI am I on the right track?
Background: Ingrid, a Homeowner from Virginia Beach, Virginia.
Bathroom Light Fixture Problem #2
- Bathroom light fixture or switch have no power.
- The receptacle next to it is energized.
- The light(s) suddenly quit working the other night, as well as the light over the shower – no power there or it’s switch either.
- The circuit from the breaker box (labeled ‘Bath’) energizes the working receptacle, where does the power come from for the fixtures?
- All GFI outlets check OK.
- No other problem areas.
This electrical wiring question came from Beki in Henderson, Nevada.
Thanks for your electric wiring questions Ingrid and Beki.
Ingrid, Yes I believe you are on the right track, let’s continue and get your bathroom working again.
How to Repair a Bathroom Light Circuit
Skill Level: Intermediate to Advanced.
Tools Required: Basic Electricians Pouch Hand Tools and Voltage Tester.
Estimated Time: Depends on personal level experience, ability to work with hand tools and electrical troubleshooting skills.
Precaution: Identify the circuit, turn it OFF and then Tag it with a Note before performing any wiring or inspections.
Note: Electrical troubleshooting is best performed by a qualified electrical contractor.
The Most Common Problems with Bathroom Light Fixtures and How to Fix Them
- GFCI Outlet
- At the GFI outlet for the bathroom press the Test button, then the Reset Button.
- If the GFI does not reset then the GFI outlet may need to be replaced.
- If the GFI resets OK then see if the bathroom light fixture is working. If not the GFI still may have a problem – maybe.
- Bathroom light fixtures are not required to be protected by GFI unless the fixture is in close proximity to the bathtub or shower.
- Light Switch
- The light switch should be tested to see if it is getting power to one of the terminals.
- If not then the source of power needs to be identified. It’s all a process of elimination, but yes – you have to know where to start, and of course that is always at the electrical panel and identifying the circuit.
- If the switch does have power then turn it on – is there power to the other terminal? If not then the light switch needs to be replaced.
- Bad Light Bulbs
- If there is power then the light bulb may be out. Believe it or not, I have been paid to discover that a customer’s light bulb was burnt out, and one time the customer’s light switch was in the off position – true story, the customer insisted that I bill him due to his oversight. So I did.
- Problem with Light Fixture Wiring or Wire Splices
- Wall mounted and ceiling mounted light fixtures may produce a lot of heat from the light bulbs that can lead to damaged wire insulation, bad wire splices, and burnt wire connections.
- Bathroom light fixture(s) should be unfastened so the wiring and wire splice connections may be inspected.
- Faulty connections or wiring should be repaired using approved electrical parts of the same circuit ratings.
- Make sure the light bulbs of the fixture are the appropriate size to prevent overheating and further damage.
- Light Circuit
- Many bathroom outlets may be wired with a separate circuit and may not branch to the light and exhaust fan.
- If the switch does have power then turn it on – is there power to the other terminal?
- If not then the light switch needs to be replaced.
NOTE: Electrical problems like this are best discovered when using a voltage tester.
More detailed information can be found here in the electrical troubleshooting area here in this website. Just click the Troubleshooting Electrical Wiring link below.
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