The short answer
Burning smells, smoke, sparks, scorch marks and shocks are emergencies, so stop using the circuit and call an electrician now, or 911 if there is smoke or fire. Warm outlets, buzzing, whole-house flickering and breakers that trip often need attention soon. Loose outlets, two-prong outlets and older wiring are worth planning to fix.
- Burning smells, smoke or sparks mean shut off power and call
- Shocks and tingles always need an electrician
- Warm outlets point to a loose or overloaded connection
- Frequent breaker trips point to a problem worth checking
- Summer heat makes weak connections show up faster
Most electrical problems give some warning before they turn serious. The trick is knowing which warnings can wait for a scheduled visit and which mean you should stop what you’re doing and call.
When it’s an emergency
Call an electrician right away, or 911 if there is smoke or fire, if you notice:
- A burning smell from an outlet, switch, panel or appliance
- Smoke or sparks from an outlet, switch, panel or meter
- Scorch marks or melted plastic on a device or cover plate
- A shock from a switch, outlet, appliance or faucet
- A tingle in or near a pool or spa
- A panel or meter-main that is hot, loudly buzzing or arcing
- A downed power line near the house
What to do while you wait:
- Shut off that breaker or the main, unless anything nearby is hot, wet or sparking
- Don’t open the panel cover or touch anything that’s sparking
- For a pool tingle, get everyone out, keep them out, and call an electrician
- Stay away from downed lines and call 911 and APS or SRP, depending on your address
Common warning signs and what they usually mean
| Sign | What it usually means | How urgent |
|---|---|---|
| Warm or discolored outlet or switch plate | Loose connection, worn device or overloaded circuit | Soon. Stop using it until it’s checked |
| Buzzing or crackling | Loose connection, arcing or a failing device or breaker | Soon. Now if there’s heat or a smell |
| Flickering in one fixture | Bulb, socket or a loose connection in the fixture | Low |
| Flickering or dimming across the house | Loose connection at the panel or service | Soon |
| Breakers that trip often | Overload, a fault or a worn breaker | Soon |
| Breaker that won’t reset | Short or ground fault | Soon. Leave it off |
| GFCI that trips again and again | Moisture, a ground fault or a worn GFCI | Soon |
| Outlets that don’t hold plugs | Worn contacts that can overheat | Plan it |
| Two-prong outlets | Ungrounded wiring in an older home | Plan it |
| Rust on the meter-main cabinet | Water getting in over the years | Plan it, sooner if the rust is heavy |
A closer look at the big ones
Warm outlets and switch plates
Heat at a connection means resistance, and resistance tends to get worse. A worn outlet, a loose wire on a terminal or a circuit carrying too much can all cause it. Some dimmers run slightly warm by design, but an ordinary outlet or switch shouldn’t.
Some homes built roughly 1965 to 1973 have aluminum branch-circuit wiring, and the CPSC has documented a fire risk at its connections. If your home is from that era and you find warm devices, have the wiring checked. The fixes are rewiring or approved repairs such as COPALUM crimps or AlumiConn connectors.
Flickering and dimming lights
One flickering fixture is usually a bulb or a worn socket. Lights that flicker across several rooms, or a whole house that dims, point to a connection at the panel, the meter-main or the utility’s service. An electrician can find which, and bring in APS or SRP if the problem is on their side.
Lights that dim for a moment when the AC compressor starts can be normal. If the dimming is getting worse or the lights drop a lot, have it checked.
Breakers that trip often
A breaker that trips is doing its job. The question is why. Heat makes breakers trip at lower loads, so problems often show up first in July. The cause might be an overloaded circuit, a worn breaker or a service that’s too small for how the house is used now.
Don’t replace a tripping breaker with a bigger one. The breaker is sized to protect the wire, and a larger breaker can let that wire overheat.
Shocks and tingles
A shock from a switch, appliance or faucet is never normal, even a small one. It can mean a ground fault, a damaged device or missing grounding. Stop using whatever shocked you and call an electrician.
Old wiring and older panels
Some houses earn a check before any symptom shows up. That includes 1920s to 1950s homes in central Phoenix with cloth-insulated wire, two-prong outlets and occasionally knob-and-tube, and 1960s and 1970s homes with Federal Pacific Stab-Lok or Zinsco panels.
Why summer brings these out
Air conditioning is the biggest load in most Valley homes from roughly May through October, and summer highs regularly top 110°F. Connections loosen over many heat cycles, and panels on west- or south-facing walls bake in the sun. A weak spot that behaved all winter often shows itself in July, which makes spring a good time to have a questionable outlet or panel looked at.
What you can safely do yourself
- Reset a tripped breaker once
- Unplug things on a circuit to see if the trips stop
- Press the test and reset buttons on GFCI outlets now and then
- Replace a bulb with one rated for the fixture
- Note when the problem happens and what was running at the time
Leave the rest to a licensed electrician, including opening the panel, replacing breakers and tracing a burning smell. Don’t tape over a warm outlet or keep using a circuit to see what happens.
If you’re not sure how serious something is, Precise Electrical can take a look and tell you whether it needs fixing now or can be planned for later.
Related services: Electrical repair, 24/7 emergency electrical service, Electrical safety inspections