How to Inspect Your Outdoor Wiring After Winter Damage

Outdoor wiring inspection after winter is one of the most overlooked tasks on a homeowner’s spring checklist. In Arvada, CO, and across the Denver Metro, winters are not gentle. Temperatures swing from 60°F to single digits within hours. Snow piles up, melts, and refreezes. That freeze-thaw cycle does real damage to the electrical systems on the outside of your home — and a lot of that damage is invisible until something stops working or, worse, becomes a fire hazard.

This article walks you through exactly what to look for, what to leave alone, and when to call a licensed electrician.

Why Colorado Winters Are Hard on Outdoor Electrical Systems

Colorado’s Front Range weather is unpredictable by design. The same Chinook winds that push temperatures above 60°F in January can be followed by a hard freeze two days later. When moisture gets into wiring, conduit, or outlet boxes and then freezes, it expands. That expansion cracks insulation, loosens connections, and forces gaps into sealed components.

According to the [U.S. Fire Administration](https://www.usfa.fema.gov/), electrical fires account for roughly 6.3% of all residential fires in the country. Outdoor electrical failures — particularly those caused by moisture intrusion — are a contributing factor that rarely gets the attention it deserves.

The Denver Metro gets an average of 57 inches of snow per year. That’s months of exposure for every outdoor outlet, fixture, junction box, and conduit run on your property.

Start with a Visual Walk-Around

Before touching anything, do a full visual inspection of every exterior electrical component. You’re not testing anything yet — you’re looking.

Walk the perimeter of your home and check:

• Conduit runs along exterior walls for cracks, separations, or sections that have pulled away from the wall
• Outlet boxes and cover plates for rust, discoloration, or warping
• Outdoor light fixtures for cracked lenses, water inside the housing, or rust on mounting hardware
• Where wiring enters or exits the home for gaps in caulking or weatherproofing
• Ground-level wiring runs for signs that frost heave shifted or exposed sections of cable

Write down anything that looks off. You’ll reference this list when you get to the hands-on portion.

Warning Signs That Require Immediate Attention

Some things you can note and monitor. Others need a phone call right now.

**Stop using any outdoor outlet or fixture immediately if you see:**

• Exposed or bare wire — insulation that has cracked, peeled, or pulled away
• Scorch marks or discoloration around an outlet, box, or fixture
• Water pooling inside an outlet box or fixture housing
• Wiring that has been physically cut, pinched, or crushed by ice or falling branches
• A GFCI outlet that won’t reset after winter

Exposed wire in a wet environment is a shock and fire risk. Do not attempt to tape over it, cap it, or work around it. That’s a situation for a licensed electrician.

Testing Your Outdoor Outlets

Once your visual walk-around is complete, test each outdoor outlet.

Start with the GFCI outlets. These are the outlets with the Test and Reset buttons, typically located near hose bibs, under overhangs, or on garage exteriors. Press the Test button — the outlet should lose power. Press Reset — power should return.

If a GFCI outlet won’t reset, is physically damaged, or trips immediately when reset, it needs to be replaced. GFCI protection is required by the [National Electrical Code (NEC)](https://www.nfpa.org/codes-and-standards/nec) for all outdoor receptacles, and a failed GFCI means you have no protection against ground faults in a wet environment.

Use a basic outlet tester (available at any hardware store for under $15) to check standard outdoor outlets for correct wiring and grounding. A wiring fault that wasn’t present last fall may have developed over winter as moisture worked into connections.

Inspecting Conduit and Junction Boxes

Conduit protects the wiring that runs along your exterior walls, through your yard, or underground to outbuildings, post lights, or landscape features. Colorado’s freeze-thaw cycles are brutal on conduit — particularly older PVC that becomes brittle in cold temperatures.

Look for:

• Cracks or splits in PVC conduit, especially at joints and fittings
• Metal conduit that has shifted or separated from its connectors
• Junction boxes where the cover has been pushed off or the gasket has deteriorated
• Rust or corrosion inside a metal junction box (which means moisture got in)

If conduit has cracked or separated, the wiring inside is exposed to moisture and physical damage. A split section of conduit along a wall might look minor, but water follows the path of least resistance — and it will travel that conduit and reach your connections.

Underground Wiring: What You Can’t See

Frost heave is common in the Denver Metro. It occurs when moisture in the soil freezes, expands, and shifts whatever’s buried in it. Underground wiring to exterior fixtures, outbuildings, or landscape lighting can be pulled at connection points, bent at sharp angles, or pushed partially above grade.

If an outdoor fixture or outlet that is fed by underground wiring stopped working over winter, or if you notice ground disturbance near a buried run, have that circuit inspected before using it.

The [International Association of Certified Home Inspectors](https://www.nachi.org/electrical.htm) recommends that underground wiring be inspected after any significant soil movement, including frost heave, for exactly this reason.

When to Stop and Call a Licensed Electrician

DIY electrical work has clear limits. Here is where those limits are:

• Any repair involving exposed, damaged, or water-compromised wiring
• A GFCI outlet that fails to reset or tests as faulty
• An outlet tester showing a wiring fault — reversed polarity, missing ground, or open neutral
• Any junction box with visible corrosion, rust, or signs of moisture intrusion
• Underground circuits that stopped working over winter
• Conduit that has cracked, separated, or been physically damaged
• Any outdoor circuit that trips its breaker repeatedly

Attempting to repair these issues without the proper training, tools, and permits creates liability for your property and real risk of injury or fire. Licensed electricians carry the certifications required by Colorado law and understand the specific code requirements that apply to outdoor electrical work.

Serving Arvada, CO and the Denver Metro

ElectriCall provides outdoor wiring inspection and repair services across the Denver Metro — including Arvada, Golden, Lakewood, Westminster, Wheat Ridge, Broomfield, Boulder, Evergreen, and Louisville.

Arvada is one of the oldest communities in Jefferson County, incorporated in 1904, and its housing stock reflects that history. Many homes in established Arvada neighborhoods have original or aging outdoor electrical systems that were not designed for modern load demands or current code requirements. Spring is the right time to catch winter damage before it becomes a summer problem.

If your outdoor wiring inspection turns up anything on the warning signs list above, call ElectriCall now at 720-879-2253. Our licensed electricians will assess the damage, walk you through your options, and get your outdoor electrical system back to safe, code-compliant operation before the season gets away from you.

Don’t wait for a tripped breaker or a failed outlet to tell you what a winter inspection would have caught in March. Call 720-879-2253 today and schedule your outdoor electrical inspection with ElectriCall.