Category: Troubleshooting

You’re sitting in the living room on a hot Michigan afternoon, the central air kicks on, and for a split second every light in the house dims. If that quick flicker has you wondering whether something’s wrong, you’re asking the right question. Sometimes it’s perfectly normal. Other times, it’s an early warning sign worth taking seriously.

At Primetime Electrical and General Contracting, we get this call all summer long from homeowners across Sterling Heights and the surrounding Macomb and Oakland County communities. Here’s why it happens, when it’s harmless, and when it’s time to have an electrician take a look.

The Short Answer: Inrush Current

Your air conditioner’s compressor is one of the most power-hungry devices in your entire home. The moment it starts up, it pulls a large surge of electricity — often several times its normal running load — to get the motor spinning. Electricians call this “inrush current.”

That brief, heavy draw can cause a momentary dip in voltage across your home’s wiring. Lights on the same electrical system react to that dip by dimming for a fraction of a second. A quick, slight flicker right as the AC engages is common and usually nothing to worry about.

The concern is when the flickering is frequent, dramatic, or getting worse over time. That’s when it shifts from a quirk to a symptom.

When Flickering Is a Warning Sign

A healthy electrical system should absorb the AC’s startup surge with only a barely-noticeable blip. If you’re seeing any of the following, something deeper may be going on:

The lights dim noticeably or for longer than a quick flash. Multiple rooms flicker, not just the ones near the AC unit. The flickering has gotten worse over recent months. You also notice flickering when other large appliances start — the dryer, microwave, or refrigerator. Flickering comes with other symptoms like warm outlets, a buzzing panel, or breakers that keep tripping.

When the pattern looks like this, the dimming is telling you that your system is straining to deliver power. Our electrical troubleshooting team can pinpoint exactly which of the causes below is to blame.

Common Causes Behind the Flicker

1. An Overloaded or Undersized Electrical Panel

If your AC shares its electrical demand with the rest of the house through an aging or undersized panel, the system simply may not have the headroom to handle that startup surge cleanly. Many older Southeast Michigan homes were never wired for the central air, EV chargers, and appliance loads we run today.

A circuit breaker and panel upgrade increases your home’s capacity so large loads like your AC start up without dragging down everything else.

2. The AC Needs Its Own Dedicated Circuit

Central air conditioners and other major appliances should run on a dedicated circuit — a line that serves nothing else. If your AC is sharing a circuit with lighting or outlets, its startup surge will visibly affect those lights every time. Adding a properly sized dedicated circuit is a common, straightforward fix.

3. Loose or Outdated Wiring

Loose connections at the panel, at outlets, or within the wiring itself create resistance, and resistance shows up as flickering — and as a genuine fire risk. Homes with original outdated wiring are especially prone to this. If your home is a few decades old and you’ve never had the wiring evaluated, flickering is a good prompt to do so. Replacing aging wire with modern, code-compliant electrical rewiring eliminates the risk and the flicker.

4. A Hard-Start Issue with the AC Itself

Sometimes the problem is on the air conditioner’s side — a worn compressor or a failing start capacitor that makes the unit draw even more current than it should at startup. In these cases, adding a “hard-start kit” or servicing the unit reduces the surge. An electrician can help determine whether the issue lives in your wiring or in the equipment.

5. A Utility-Side or Service Problem

Occasionally the dip originates upstream — at the service connection or even with the utility. If your neighbors notice the same thing, or the issue affects the whole house equally, it may be worth investigating the incoming service. A whole-home assessment will rule this in or out.

How to Protect Your Home and Electronics

Beyond fixing the root cause, two upgrades are worth knowing about. Whole-home surge protection shields your electronics and appliances from the voltage swings that motors and outages can create. And if power reliability is a concern, a whole-house standby generator keeps everything running smoothly through outages — common during Michigan’s storm seasons.

If you ever notice flickering paired with a burning smell, sparking, or a hot panel, treat it as urgent and call our 24/7 emergency electrician line right away.

Don’t Guess — Get It Diagnosed

A quick flicker when the AC starts can be perfectly normal. But persistent or worsening flickering is your home’s way of asking for help, and it’s not worth ignoring. The only way to know which one you’re dealing with is to have a licensed electrician test the system and trace the cause.

Primetime Electrical and General Contracting is locally owned, fully licensed and insured, and 5-star rated, with 8+ years powering homes across Sterling Heights, Macomb and Oakland County, and the greater Metro Detroit area. We’ll find out exactly why your lights flicker and fix it right the first time.

Call us 24/7 at (810) 397-2401 or request your free in-home estimate today.

If you’ve made one too many trips to the basement to flip a breaker back on, you already know how frustrating a nuisance trip can be. The good news: a tripping breaker isn’t your home misbehaving — it’s your electrical system doing exactly what it was designed to do. The breaker is protecting you. The real question is why it keeps having to.

At Primetime Electrical and General Contracting, we troubleshoot tripping breakers in homes across Sterling Heights, Macomb County, and Oakland County every week. Here’s what’s usually going on, what you can safely check yourself, and when it’s time to call a licensed electrician.

First, What a Circuit Breaker Actually Does

Your electrical panel is the heart of your home’s wiring. Each breaker controls a circuit — a loop of wiring that feeds outlets, lights, or a specific appliance. A breaker’s job is to cut power the instant something goes wrong, before overheated wiring can start a fire or deliver a dangerous shock.

So when a breaker trips, it’s not failing. It’s succeeding. Understanding which kind of fault triggered it is the key to fixing the problem for good.

The Most Common Reasons Breakers Keep Tripping

1. Circuit Overload

This is by far the most common cause. Every circuit has a limit — typically 15 or 20 amps in a home. When you plug in too many power-hungry devices on the same circuit, you exceed that limit, and the breaker trips to prevent the wires from overheating.

Classic culprits include space heaters, hair dryers, microwaves, and window air conditioners — especially when several run at once. If your breaker trips every time you use the microwave and the toaster together, you’ve almost certainly found an overload.

What you can do: Spread high-wattage devices across different circuits and outlets. If you constantly run out of capacity, though, the underlying issue is that your home simply needs more circuits or a panel upgrade.

2. Short Circuits

A short circuit happens when a hot wire touches a neutral wire, allowing a sudden surge of current to flow. This is more serious than an overload. You might notice a burning smell, discoloration around an outlet, or a breaker that trips the instant you reset it.

Short circuits can come from damaged wiring, a faulty appliance, or pests chewing through insulation inside your walls. This is not a DIY fix — it requires a professional to safely locate and repair the fault.

3. Ground Faults

A ground fault is similar to a short circuit, but here the hot wire contacts a ground wire or a grounded part of the system — often in damp areas like kitchens, bathrooms, garages, or outdoor outlets. That’s exactly why modern code requires GFCI protection in those locations.

If a GFCI outlet or breaker keeps tripping, it may be doing its job by detecting moisture or a genuine fault. Persistent ground faults should always be inspected, since they pose a real shock hazard.

4. An Aging or Undersized Electrical Panel

Many homes in Southeast Michigan were wired for a different era. If your house still runs on a 60- or 100-amp panel — or you have an older brand of panel known for reliability problems — it may simply lack the capacity for modern living: EV chargers, central air, hot tubs, home offices, and a kitchen full of appliances.

Frequent tripping, a warm panel, flickering lights, or breakers that feel loose are all signs your panel is overdue for an upgrade. A modern panel restores capacity, improves safety, and brings your home up to code.

5. A Failing Breaker

Breakers don’t last forever. After years of tripping and resetting, the internal mechanism can wear out and start tripping at lower loads than it should — or fail to trip when it needs to, which is even more dangerous. A worn breaker is an inexpensive part to replace, but it should always be done by a licensed electrician.

What You Can Safely Check Yourself

Before calling in a pro, there are a few safe steps a homeowner can take:

Unplug everything on the affected circuit, reset the breaker, then plug devices back in one at a time. If the breaker trips the moment a specific appliance kicks on, that appliance is likely the problem. If it trips with nothing plugged in, the issue is in the wiring or the breaker itself — and that’s your cue to call an electrician.

What you should never do is repeatedly force a breaker back on that keeps tripping, replace a breaker with a higher-amperage one to “stop the nuisance,” or open the panel and poke around inside. Those moves remove the very protection keeping your home safe and can lead to fire or electrocution.

When to Call a Licensed Electrician

It’s time to bring in a professional if you notice any of the following: a breaker that trips repeatedly or won’t reset, a burning smell or scorch marks near outlets or the panel, a warm or buzzing panel, flickering lights throughout the house, or sparking outlets. These are warning signs that something more serious is happening behind your walls.

Electrical troubleshooting is part detective work, part safety science. A trained electrician can test circuits, isolate the fault, and fix the root cause — not just the symptom — so you stop making trips to the panel for good.

Get to the Root of It with Primetime Electrical

Primetime Electrical and General Contracting is a locally and veteran owned, fully licensed and insured team serving Sterling Heights and more than 30 communities across Macomb, Oakland, and Metro Detroit. With 8+ years of experience and a 5-star Google rating, we diagnose tripping breakers fast and fix them right the first time — whether the answer is a simple breaker replacement, a dedicated new circuit, or a full panel upgrade.

If your breakers keep tripping, don’t keep guessing. Call us 24/7 at (810) 397-2401 or request a free in-home estimate. We’ll find out exactly why — and make your home safe again.