If you’ve ever walked through a home during an inspection in Denver or Colorado Springs, you’ve probably seen your inspector, like myself, Joshua Bradley, plugging a little orange device into the outlets in the kitchen or bathroom. You might hear a "click," the lights on the tester go out, and I’ll say, "GFCIs are working great."
But what exactly is a GFCI, and why do we care so much about those two little buttons in the middle of your outlet?
At Plum Tree Home Inspections, we believe that a home inspection shouldn't be a list of scary "red flags." Instead, it should be an education. Understanding how your home keeps you safe, especially when it comes to electricity and water, is a huge part of being a confident homeowner.
Let’s break down the mystery of the GFCI outlet in plain English.
What is a GFCI Outlet?
GFCI stands for Ground Fault Circuit Interrupter. That sounds like a mouthful, but its job is actually very simple. Think of it as a lightning-fast security guard for your electrical system.
In a normal outlet, electricity flows out to your toaster or hair dryer and then flows back into the outlet in a perfect loop. A GFCI outlet constantly "watches" that loop. It compares the amount of electricity going out to the amount coming back.
If even a tiny bit of electricity goes missing, we’re talking 4 to 6 milliamps, which is less than what it takes to power a single LED on your phone, the GFCI assumes that electricity is "leaking" somewhere it shouldn't be. That "somewhere" could be through a puddle of water or, worse, through you.

The "Save Your Life" Speed
When the GFCI senses that leak, it "trips." It physically snaps the internal connection and shuts off the power instantly. How fast? Usually in about 1/30th of a second.
That speed is the difference between a minor "zap" that startles you and a life-threatening electrical shock. This is why GFCIs are one of the single most important safety features in modern Colorado homes.
Why Do We Need Them Near Water?
You’ll notice that GFCIs aren't everywhere in your house. You usually won't find them in your bedroom or living room (unless those rooms are very close to a sink). The National Electrical Code (NEC) requires them in areas where "moisture meets electricity."
In the Denver Metro area and across the Front Range, we look for GFCIs in:
- Kitchens: Any outlet serving the countertop.
- Bathrooms: Near sinks, tubs, and showers.
- Garages: Because concrete floors can be damp and grounded.
- Exteriors: Our Colorado snow and rain mean outdoor outlets need protection.
- Basements: Especially unfinished areas or near utility sinks.
Whether you are buying a classic Victorian in Boulder or a new build in Castle Rock, ensuring these areas are protected is a top priority during our home inspection process.
How to Test Your GFCIs (The Easy Way)
GFCIs are mechanical devices, which means they can eventually wear out. Safety experts recommend testing them once a month. Don’t worry, you don’t need a fancy tester like I use.
The "Lamp Method" Test:
- Plug in a lamp: Find a small lamp or a nightlight, plug it into the GFCI outlet, and turn it on.
- Press "TEST": Push the "Test" button (usually the top or black button). You should hear a distinct click. The "Reset" button should pop out, and the lamp should turn off.
- Press "RESET": Push the "Reset" button (usually the bottom or red button) back in until it clicks. The lamp should turn back on.
If the lamp stays on after you hit "Test," or if the "Reset" button won't stay in, the outlet is faulty and needs to be replaced by a licensed electrician.

A Common Finding, An Easy Fix
During a standard home inspection, which usually costs between $450 and $600 for a single-family home in Colorado, missing or non-functioning GFCIs are one of the most common things we find.
If you are a buyer, don't let this alarm you! Replacing a standard outlet with a GFCI is a relatively inexpensive and quick fix for an electrician. If you are a seller, taking care of this before you list your home is a great way to show buyers (and their agents at RE/MAX or Keller Williams) that you’ve maintained the home with care.
At Plum Tree Home Inspections, we take pride in being "realtor-friendly." We explain these findings to buyers in a way that provides perspective. It’s a safety upgrade, not a deal-breaker.
Why Choose Plum Tree Home Inspections?
When you're making one of the biggest investments of your life, you deserve an inspector who looks at the big picture, from the roof’s hail resistance to the sewer line’s integrity.
As an InterNACHI Certified Professional Inspector, I stand behind every inspection with:
- The $25,000 Honor Guarantee: Protecting your investment and giving you peace of mind.
- The InterNACHI Buy-Back Guarantee: If I miss something covered by the InterNACHI Standards of Practice, they’ll buy your home back at the full price you paid.
Whether you’re in Denver, Fort Collins, or Colorado Springs, we’re here to help you move forward with confidence.

Ready to schedule your inspection?
We would be honored to help you get to know your new home. From checking your GFCI outlets to performing Radon testing and Sewer Scopes, we’ve got you covered.
Contact Us Today:
Plum Tree Home Inspections
📍 1500 N Grant St Suite R, Denver, CO 80203
📞 +17205712498
🌐 www.plumtreeinspections.casa
Thank you for reading! If you have any follow-up questions about your outlets or any other part of your home inspection report, please don't hesitate to reach out. We are always here to support you even after the inspection is over.
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