Electrical problem guides
Home Electrical Problems, Explained
Start with what you're seeing. Each guide answers first, then covers causes, safe checks, what not to do and when it's time to call.
Safety first
Smoke, flames or a hot panel? Get everyone outside and call 911. Come back to these guides once everyone is safe.
Panel & circuit capacity
- 01Get it checked soon
Breaker Trips After Installing New Appliance
A new appliance that keeps tripping a breaker usually points to an overloaded circuit, a wrong-size breaker or a wiring fault at the new connection.
- 02Get it checked soon
Breaker Trips at the Same Time Every Day
A breaker that trips on a schedule usually points to something on a timer or cycle, such as HVAC, a well pump, irrigation or a water heater.
- 03Get it checked soon
Electrical Panel Has Too Many Breakers
A crowded panel with tandem breakers or two wires under one screw can be a code and safety problem, especially in homes that have added circuits over the years.
- 04Usually not an emergency
Not Enough Breaker Space in Panel
Running out of panel slots is common when adding an EV charger, hot tub or remodel circuits, and there are usually several ways to make room.
Older-home wiring
- 05Get it checked soon
Old House Has Two-Prong Outlets
Two-prong outlets mean the circuit likely has no ground, and the fix is a grounding or GFCI solution, not simply swapping in three-prong outlets.
- 06Get it checked soon
Old House Has Knob and Tube Wiring
Knob and tube wiring isn't automatically dangerous, but its age, lack of a ground and past modifications make an evaluation and replacement plan wise.
- 07Get it checked soon
Electrical Wiring Has No Ground
Ungrounded wiring is common in older homes and can be addressed with grounding conductors, GFCI protection or rewiring, depending on the circuit.
- 08Act promptly
Outlet Sparks When Plugging In
A small, brief spark can be normal when plugging in a device that's switched on, but large, loud or repeated sparks point to a problem.
- 09Get it checked soon
Outlet Falls Out of Wall
An outlet that pulls out of the wall usually has a loose box, missing mounting ears or crumbling plaster, and it stresses the wiring every time you unplug something.
Switches, dimmers & fixtures
- 10Get it checked soon
Switch Plate Feels Warm
A warm switch plate is sometimes harmless, but heat at a standard toggle switch often points to a loose or worn connection.
- 11Usually not an emergency
Light Switch Controls Wrong Light
When a switch runs the wrong fixture, the cause is usually a wiring mix-up from a past remodel or fixture swap, not a failing part.
- 12Usually not an emergency
Three-Way Light Switch Not Working
Three-way switches fail in a few predictable ways, from a worn switch to swapped travelers after a replacement.
- 13Get it checked soon
Dimmer Switch Gets Hot
Dimmers run warm by design, but a dimmer that gets hot often means too much load, the wrong bulbs or dimmers ganged too tightly.
- 14Get it checked soon
Recessed Light Keeps Going Out
A can light that shuts off and returns is often its built-in thermal protector reacting to heat from bulbs, insulation or the fixture itself.
- 15Act promptly
Ceiling Fan Trips Breaker
A fan that trips the breaker usually has a short in the fan, its light kit or the box wiring, or it is setting off an arc-fault breaker.
- 16Usually not an emergency
New Ceiling Fan Has No Power
A new fan that will not run is often a pull chain, wall switch or remote receiver setting, and sometimes a wiring mistake in the box.
GFCI & wet areas
- 17Get it checked soon
GFCI Outlet Won't Reset
A GFCI that will not reset may have no power, may be sensing a real ground fault, or may simply have worn out.
- 18Get it checked soon
GFCI Trips When It Rains
A GFCI that trips in wet weather is usually telling you water is reaching something it shouldn't: a box, a cord, a fixture or a buried cable.
- 19Get it checked soon
Bathroom Light Trips Breaker
When a bathroom light or fan trips a breaker, the cause is often moisture in the fixture, a failing fan motor or a circuit shared with high-draw appliances.
Remodels & new rooms
- 20Usually not an emergency
Kitchen Appliance Needs Its Own Circuit
Many kitchen appliances are meant to have their own circuit. Here is how to tell whether yours does, and what adding one involves.
- 21Usually not an emergency
Home Addition Needs Electrical Wiring
A home addition needs its own circuits, lighting and outlets planned around the house's existing panel and service capacity.
- 22Usually not an emergency
New Room Has No Electrical Outlets
Bonus rooms, converted garages and finished spaces often end up with few or no outlets. Here's how to plan adding them the right way.
- 23Usually not an emergency
Garage Needs More Electrical Outlets
Most garages were wired for a light and a door opener. Adding outlets for tools, freezers and workbenches takes some planning.
Generators & EV chargers
- 24Act promptly
Generator Runs but House Has No Power
If the generator runs but nothing in the house comes on, the problem is usually between the generator and the panel: a switch, breaker or connection.
- 25Get it checked soon
EV Charger Keeps Tripping Breaker
An EV charger that trips its breaker is usually on a circuit that's too small, has a loose connection, or is clashing with GFCI protection.
FAQ
Questions about home electrical problems
Straight answers to the questions homeowners ask most about this topic.
Call NowBurning smells, smoke, sparking, a hot switch plate or dimmer, shocks, and water reaching wiring are urgent. If there is smoke or fire, leave and call 911. Otherwise, stop using the circuit, switch it off at the breaker if that is safe, and call.
Resetting once is generally fine. If it trips again right away, or you hear buzzing or smell something hot, leave it off. Repeated resets can hide a fault that is heating wiring inside the wall.
Live parts inside boxes and panels can cause serious shocks and arc burns, and the service conductors in a panel stay energized even with the main breaker off. Noting what you see, hear and smell is safer and more useful to the electrician.
Chattanooga has many homes from the early and mid 1900s with two-prong outlets, ungrounded circuits and small panels, and many newer projects that add circuits a panel was never sized for. Those are where homeowners most often get stuck.
Yes. Needing a dedicated circuit, more garage outlets or wiring for an addition are common reasons homeowners call, even though nothing is broken. Those guides explain what planning is involved.
When it started, which outlets or lights are affected, what was running at the time, whether a breaker or GFCI tripped, and any smells or sounds. Photos of the panel label help too.
Call now
Still not sure what's wrong?
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