What to check before calling an electrician
The safe, homeowner-level checks that resolve a large share of 'no power' calls — and the clear signs that mean stop and call a licensed electrician now.
A meaningful share of residential electrical service calls end with the electrician pressing a reset button and writing an invoice. Those calls are avoidable. A different share of them involve heat, arcing, or aluminum branch wiring, and those absolutely require a licensed professional.
This guide covers only the checks a homeowner can do without opening a device or a panel. If a step asks you to remove a cover plate or touch a conductor, it is not in this guide on purpose.
Stop immediately and call a licensed electrician if you see any of these
These are not diagnostic puzzles. They are conditions with a real fire or shock risk, and every one of them needs a licensed professional the same day.
- Any burning smell, scorch mark, discoloration, or melted plastic at an outlet, switch, or panel.
- Buzzing, crackling, or sizzling from a wall, fixture, or breaker panel.
- A breaker that trips again immediately after being reset, or trips repeatedly.
- Warm or hot cover plates, or an outlet that is warm to the touch.
- Any shock or tingle when touching an appliance, faucet, or switch.
- Water intrusion in or near a panel, or a panel that shows rust.
- Flickering across multiple circuits at once, or lights that dim and brighten together — a possible loose service neutral, which is an emergency.
- Aluminum branch wiring, knob-and-tube, or a federal Pacific / Zinsco panel — all require professional evaluation.
Safety warningNever remove a breaker panel cover, work in a live junction box, or replace a breaker yourself. Panel interiors remain energized above the main breaker even when the main is switched off.
Check 1: is it the device or the outlet?
Plug a known-working lamp or phone charger into the outlet. If the lamp works, the problem is the appliance and no electrician is needed. If the lamp does not work, note whether nearby outlets on the same wall also fail — that tells the electrician (or TOOLA) whether it is one device or one circuit.
Check 2: GFCI resets — the single most common fix
GFCI outlets protect other outlets downstream of them. A tripped GFCI in a garage or bathroom regularly kills outlets in a completely different room, which is why people assume something serious has failed.
Press the RESET button firmly on every GFCI you can find, even ones that look fine. Check bathrooms, the kitchen counter, the garage, the basement, the laundry area, and any exterior outlets — exterior GFCIs trip in rain constantly.
- If RESET clicks and holds, and the dead outlets come back: fixed.
- If RESET will not hold, there is a genuine ground fault downstream. Unplug everything on that circuit and try once more; if it still will not hold, call an electrician.
- If a GFCI is more than 10–15 years old and unresponsive, the device itself may have failed and needs replacement by a qualified person.
Check 3: the breaker panel — visual only
With the panel door open but the interior cover left in place, look at the breaker handles. A tripped breaker usually sits between ON and OFF, or shows a small colored window. Some tripped breakers look almost fully on, so feel for the one with a softer, springier handle.
To reset: push the handle firmly all the way to OFF first, then back to ON. Going straight from a tripped position to ON does not re-latch the mechanism, which is why people think a reset failed.
Safety warningIf the breaker trips again right away, stop. A repeatedly tripping breaker is doing its job — it is telling you there is a short, a ground fault, or an overload. Do not keep resetting it, and never replace it with a higher-amperage breaker.
Check 4: switches, bulbs, and the boring causes
Half of a room's outlets going dead is often a wall switch that controls a switched receptacle — a common setup in older living rooms. Flip every switch in the room, including the one that seems to do nothing.
For fixtures, replace the bulb with one you know works before diagnosing anything else, and confirm the bulb's wattage and type match what the fixture is rated for. LED retrofits in enclosed fixtures fail early from heat, and that failure looks like a wiring problem.
Check 5: appliance-specific resets
Garbage disposals have a red overload reset button on the bottom of the unit. Microwaves, dishwashers, and washing machines are often on dedicated circuits that trip under a motor fault. Space heaters, hair dryers, and window air conditioners are the usual overload culprits — moving one to a different circuit frequently ends the problem entirely.
What to tell the electrician if you do call
Good notes shorten the visit and lower the bill. Write down: which outlets and fixtures are dead, which breaker (number and amperage) is involved, whether it trips instantly or after a delay, what was running when it first happened, whether GFCIs were reset, and the home's approximate age and panel brand.
TOOLA captures exactly this in a photo-based intake, which is the version of the story a professional actually needs.