How to Fix an Outlet That Doesn't Work

You plug something in and nothing happens. Before you call an electrician, know this: most dead outlets have a simple, fixable cause that you can diagnose and resolve yourself in minutes. Here are the 7 most common reasons an outlet stops working — and exactly what to do about each one.

What You'll Need

Klein Tools RT250 GFCI Outlet Tester — instantly tells you if an outlet has power and whether it's wired correctly. The fastest first step for any dead outlet.
Klein Tools NCVT1P Non-Contact Voltage Tester — safely check for live voltage at the outlet without touching any wires.
AstroAI Digital Multimeter — measure voltage at the outlet and diagnose wiring faults.
Flathead and Phillips screwdrivers
Electrical tape

Step 1: Test the Outlet First

Before doing anything else, plug the Klein Tools RT250 outlet tester into the dead outlet. It will tell you instantly whether the outlet has power and whether there's a wiring fault. This single step eliminates guesswork and points you to the right fix.

7 Reasons an Outlet Stops Working (and How to Fix Each)

1. Tripped Circuit Breaker or Blown Fuse

Most common cause. Check your electrical panel — look for a breaker in the middle (tripped) position or a blown fuse. Reset the breaker (OFF then ON) or replace the fuse with the correct amperage.

See our full guides: How to Reset a Circuit Breaker | How to Fix a Blown Fuse

2. Tripped GFCI Outlet

Very common — especially in kitchens, bathrooms, garages, and outdoor areas. A GFCI outlet that has tripped will cut power to itself and any outlets downstream on the same circuit. Look for a GFCI outlet nearby (it has TEST and RESET buttons) and press RESET.

The dead outlet may not be a GFCI itself — it may be protected by a GFCI outlet in another room. Check all GFCI outlets in the house, especially in bathrooms and the garage.

See: How to Reset a GFCI Outlet

3. Loose or Disconnected Wire

Over time, wires can work loose from outlet terminals — especially in older homes with aluminum wiring or outlets that have been bumped repeatedly. A loose wire means no electrical connection, even if the outlet looks fine.

Fix:

Turn off the breaker for that circuit and confirm with your voltage tester
Remove the outlet cover plate and unscrew the outlet from the box
Inspect the wire connections — look for wires that have pulled out of the terminals or push-in connectors
Reconnect any loose wires to the correct terminals (black to brass, white to silver, bare to green)
Reinstall the outlet and restore power

4. Faulty Outlet (Worn Out)

Outlets wear out over time — the internal contacts lose their grip and can no longer make reliable contact with plug prongs. This is especially common in outlets that are 20+ years old or have been used heavily.

Fix: Replace the outlet. See our guide: How to Replace an Electrical Outlet. A new outlet costs $2–5 and takes about 15 minutes to install.

5. Half-Hot Outlet (Switched Outlet)

Some outlets are "half-hot" — one socket is always live, the other is controlled by a wall switch. If only half the outlet works, or the outlet only works when a switch is flipped, this is likely the cause.

Fix: Check if there's a wall switch nearby that controls the outlet. If you want both sockets always live, an electrician can remove the tab linking the two sockets and rewire accordingly.

6. Backstab Wiring Failure

Many outlets installed in the 1970s–90s used "backstab" or push-in connectors instead of screw terminals. These connections are less reliable and prone to loosening over time, causing intermittent or complete power loss.

Fix:

Turn off the breaker and verify with your voltage tester
Pull the outlet from the box and inspect the back — look for wires inserted into push-in holes
Remove the wires from the backstab connectors (insert a small flathead into the release slot)
Reconnect them to the screw terminals instead — this is a more reliable connection
Reinstall and test

7. Open Neutral or Open Ground

An open neutral means the neutral wire is disconnected or broken somewhere in the circuit. The outlet may show voltage with a multimeter but devices won't work properly — or may work intermittently. An open ground means the ground wire is disconnected (a safety issue, but usually doesn't affect function).

How to detect: Use the Klein Tools RT250 outlet tester — it will show a specific light pattern for open neutral or open ground faults. Confirm with your multimeter by measuring between hot and neutral (should read ~120V) and between hot and ground (should also read ~120V).

Fix: Trace the neutral wire back to the outlet, junction box, or panel and reconnect it. If the break is inside the wall, call an electrician.

When to Call an Electrician

The outlet shows burn marks, scorch marks, or smells like burning plastic
Multiple outlets in different rooms stopped working at the same time (may indicate a panel issue)
You find melted insulation or signs of arcing inside the outlet box
The outlet is in a wet area and you suspect water damage
You've checked all the above causes and still can't find the problem

Frequently Asked Questions

Why would an outlet suddenly stop working?

The most common sudden causes are a tripped breaker, a tripped GFCI outlet on the same circuit, or a loose wire that finally lost contact after working loose over time. Plug in an outlet tester first — it will point you to the right cause in seconds.

Can a dead outlet be dangerous?

A dead outlet itself isn't dangerous — but the cause might be. Burn marks, melted plastic, or a burning smell near an outlet indicate a serious wiring fault that needs immediate attention.

How do I know if my outlet is on a GFCI circuit?

Plug in the Klein Tools RT250 — it will indicate if the outlet is GFCI-protected. Alternatively, press the TEST button on any GFCI outlet in the kitchen, bathroom, or garage and see if your dead outlet loses power.

Why does only one socket of my outlet work?

This is usually a half-hot (switched) outlet where one socket is controlled by a wall switch, or a broken tab between the two sockets. Check for a nearby wall switch first.

Quick Diagnosis Checklist

☐ Plug in an outlet tester — does it show power?
☐ Check the breaker panel — any tripped breakers?
☐ Find and reset any GFCI outlets on the circuit
☐ Check for a wall switch that controls the outlet
☐ Turn off the breaker and inspect the outlet wiring
☐ Replace the outlet if it's old or worn
☐ Call an electrician if you see burn marks or can't find the cause

An outlet tester and a non-contact voltage tester are the two tools that make outlet diagnosis fast and safe. Together they cost less than a single electrician service call.

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