Short answer: Most outlet problems fall into two groups. Some you can check yourself: a dead outlet that is really a tripped GFCI somewhere else on the circuit, a tripped breaker, or a worn outlet that no longer grips a plug. Others are warning signs that need an electrician soon: an outlet that is warm, buzzing, discolored or smells like burning, a GFCI that trips again the moment you reset it, or sparks when you plug something in. Here is what each problem usually means and what is safe to check before you call.
| What you notice | What it usually means | Safe to check yourself? |
|---|---|---|
| One or more outlets are dead | A tripped GFCI elsewhere on the circuit, a tripped breaker, or a loose connection | Yes, check GFCIs and the panel first |
| The GFCI will not reset | No power reaching it, a fault on the circuit, or a worn-out GFCI | Check the breaker once. If it still will not reset, call |
| The GFCI trips again right away or very often | A ground fault: moisture, a damaged cord or appliance, or a wiring fault | Unplug everything and try once. If it still trips, call |
| Plugs fall out or feel loose | Worn contacts inside the outlet | Stop using it and have it replaced |
| Warm, buzzing, crackling, discolored or burning smell | A loose or overheating connection | No. Stop using it and call |
| Sparks when you plug in or unplug | A small spark can be normal. Large sparks, scorch marks or a pop are not | No, if you see scorching or hear a pop |
| Two-prong outlets with no ground | Older wiring with no equipment ground | No, the fix depends on the wiring |
When an outlet stops working, the most common cause is a GFCI outlet somewhere else that has tripped. A GFCI outlet can protect every outlet wired after it on the same circuit, so a GFCI in the garage, a bathroom or outdoors can cut power to an outlet in another room. Find the outlets with TEST and RESET buttons, including the ones in the garage, outside, in bathrooms and near the kitchen sink, and press RESET on each.
If that does not bring the outlet back, check the panel for a tripped breaker. A tripped breaker sits in the middle or the off position. Turn it fully off, then back on, once.
If neither fixes it, the likely cause is a loose connection at that outlet or at another outlet upstream on the same circuit. A loose wire is not something to keep testing. Loose connections heat up, and that is how outlets get scorched. Our guide to GFCI, GFI and AFCI protection explains how one GFCI protects other outlets.
A GFCI will not reset for one of three reasons:
A GFCI that trips is doing its job. It has sensed current leaking where it should not. Common causes are water in an outdoor outlet or its cover after rain, a damaged extension cord, and an appliance with a fault, such as an old freezer, a pressure washer or a power tool.
Unplug everything on that GFCI and reset it. Plug things back in one at a time. If it trips when one item is plugged in, that item is the suspect. If it trips with nothing plugged in, or trips again the moment you reset it, the fault is in the wiring or the device. That needs an electrician. Do not replace a tripping GFCI with an ordinary outlet to make the problem go away. That removes the shock protection.
If the problem is a breaker that trips when you use a light, our guide to why a light switch keeps tripping the breaker covers the causes.
If plugs slide out or the outlet no longer grips them, the metal contacts inside have worn. A loose grip can make a poor connection that heats up under load, especially with space heaters, window AC units and other high-draw appliances. Stop using that outlet and have it replaced.
The Electrical Safety Foundation International (ESFI) lists warm or discolored wall plates, crackling, sizzling or buzzing from outlets, and a burning smell from outlets or switches as warning signs of an overloaded circuit or a serious wiring problem. If you notice any of them:
If you smell burning and cannot find the source, or see smoke, leave the house and call 911.
Sources: ESFI: Home electrical safety, ESFI: Don’t overload your home.
Many older homes have two-prong outlets with no ground wire. Do not simply swap them for three-prong outlets. A three-prong outlet with no ground behind it looks safe but is not. The electrical code gives a few safe options. One is to run a ground to the outlet. Another is to install a GFCI outlet or breaker, which adds shock protection without a ground. A GFCI used this way must be labeled “No Equipment Ground,” and any three-prong outlets it protects must be labeled too.
Which option fits depends on the wiring in your walls. An electrician can tell you after looking at it. Two-prong outlets often show up on home inspection reports, and we fix home inspection items from the report.
Source: EC&M: NEC requirements when replacing non-grounding receptacles.
Safe to do: press RESET on GFCI outlets, reset a tripped breaker once, unplug appliances to find a faulty one, and stop using an outlet that worries you.
Leave to an electrician: removing a cover plate to look at the wiring, replacing an outlet or GFCI, and anything involving a warm, scorched or buzzing outlet. Working inside an outlet box means working near live parts. In Rock Hill, the city requires electrical work in a home to be done by a licensed contractor.
Source: City of Rock Hill: Information for property owners.
We repair and install outlets, including GFCI and USB outlets, in homes across Rock Hill, Fort Mill and the rest of York County, and in Charlotte. We find the cause, fix it at the source and test the circuit before we leave. We are licensed in South Carolina (M110118) and North Carolina (27147-U). An article is not a quote. Tell us what the outlet is doing, and we will come and look and give you an estimate before any work starts.
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