10 Silent Signs Your House Has a Major Electrical Problem

Updated: Jun. 23, 2024

These warning signs aren't loud, but they are serious. Here are quiet clues that your home may have a major electrical problem.

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Hot Outlets

Many electrical appliances generate heat during operation. However, the outlet itself should never get hot. If you notice heat at an outlet, immediately unplug any cords and do not use the outlet until you can troubleshoot the issue.

Switch cover plates should be treated in the same way, with one exception: Dimmer switches commonly get warm to the touch, since they dissipate the excess electrical energy to create the dimming effect. However, even dimmer switch cover plates should never be uncomfortably hot to the touch. Excess heat is why you should always check the wattage before you install a dimmer switch.

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Here are some electrical safety checks owners should do every year:

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Dead Edison bulb

Flickering Lights

Sure, Hollywood movies would have us believe flickering lights are a sure sign of ghostly visitors. But it’s much more likely there is a loose electrical connection. If the flickering is contained to a single light fixture, the fix is usually fairly straightforward. If it’s affecting multiple lights or rooms, then the problem is likely farther back in the circuit. If it’s the whole house that flickers, the problem may lie in the breaker box or at the utility drop outside your home. In that case, your best bet is to contact a licensed electrician to handle the troubleshooting for you.

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Aluminum wiring
Aluminum Wiring

Aluminum Wiring

In the late ’60s and early ’70s, high copper prices led home builders to run electrical services using single-strand aluminum wire. Laboratory tests had shown that aluminum wire was a suitable replacement for copper, so it seemed like a good way to keep costs low. The problem was that exposed aluminum oxidizes far more rapidly than copper, building up heat and leading to fire risks. In perfectly controlled laboratory conditions, this wasn’t an issue. But in the imperfect, real-world environment of your home, aluminum wiring (especially in branch circuits) was a fire hazard.

That’s why aluminum is no longer used for residential branch-circuit wiring. The U.S. Consumer Product Safety Commission (CPSC) has found that homes with aluminum wiring may be up to 55 times more likely to suffer fire damage. There are a few ways to address existing aluminum wiring, from using specialized connectors to a complete home rewire. If you suspect your home has aluminum wiring, it’s worth a call to a licensed electrician to discuss options for rewiring your house.

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Burning Smell

It’s probably no surprise that the smell of something burning should be an immediate warning sign! If the wiring in your electrical system is heating up enough to melt its plastic sheathing, you’re facing an imminent risk of fire and you need to take immediate action. Try to identify the source of the issue, whether at one fixture or the breaker box, and get it resolved quickly. If you’re not comfortable fixing it yourself, reach out to a licensed professional.

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electrified gas line
Family Handyman

Improperly Grounded Flexible Gas Lines

Corrugated stainless steel tubing (CSST) or “flex line” is a popular choice to supply gas throughout your home. But it’s important that it is properly grounded to avoid disastrous blowouts. An electrical surge, most often in a lightning strike to your home, can potentially rupture the corrugated tubing, leading to a gas leak or explosion.

It’s important to note that this photo shows an improperly grounded CSST line. The clamp could potentially pierce the line. And the sheathing acts as a barrier, defeating the purpose of the grounding.

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Ungrounded = Shocks

While we’re talking about grounding electrical systems, it’s worth noting that you may have grounding issues on a wider scale than just your gas line. If you touch a metal object connected to your home’s mechanical system and receive a shock, it’s a strong sign that your electrical system is not properly grounded. This certainly goes for electrical fixtures such as lamps or ceiling fans, but also things such as water lines or furnace ductwork. Don’t confuse these shocks with static electricity pops, which are much smaller and shouldn’t be concerning. If your electrical service is ungrounded but has three-prong receptacles, then appliances which need to be grounded won’t be.

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Loose Outlets

If you plug a cord into an outlet and notice that the insides of the outlet are moving around, it’s time to pop open that outlet and get it squared away. A loose outlet will eventually shake its wires free, and that leads to shorts, sparks and potential fire hazards. Luckily, this serious problem is a relatively easy fix. Learn how to fix an electrical cord chewed by your pet.

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Family Handyman

Bogus UL Stickers

Underwriters Laboratory is an organization dedicated to ensuring that products meet minimum safety standards. Items ranging from extension cords to smoke detectors carry a UL-listed sticker, indicating that the device and its manufacturing facility have passed inspection. Unfortunately, some manufacturers step around UL inspection by using counterfeit labels. If you’re buying cheap electrical devices, give that sticker a second glance, and look for typos or other signs that seem off to you. (See this UL guide to spotting fakes for more info.)

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Messy or Tangled Wiring

Electricians don’t get points for appearance. Beautifully arranged, well-organized cabling doesn’t conduct any better than wires that run haphazardly or aren’t quite level along a joist. However, signs of extreme disorganization or slapdash work can be an indicator of poorly done or rushed electrical work.

If you see excessively tangled lines, or crowded electrical boxes that look like rats’ nests, best to do a more thorough inspection of the rest of your home’s electrical service.

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Rodent Activity

Moving from metaphorical rats’ nests to real ones: If you see rodent droppings or nest material near your electrical wiring, check for any chew marks on the wires. Rats and mice often chew through electrical wiring until it’s bare. And while the critter probably won’t live much past that point, you may be the one in for a shock when the exposed wire begins to spark or overheat.

If you see any indications of rodent activity near your home’s wiring, check for damage. Then read up on how to keep mice at bay.