Start with the simplest fixes before calling a technician

Most EV charger problems come from loose connections, tripped breakers, or settings that got changed accidentally—not from broken equipment. Before you pay for a service call, check whether the charger is plugged in firmly, whether the circuit breaker for that outlet is in the ON position, and whether your vehicle's charging port is clean and free of debris. If the charger has a display screen, look for error codes and write them down. Many chargers also have a reset button (usually recessed, requiring a paperclip to press) that clears temporary faults.

If the charger still will not start a charge after these steps, the problem is likely in the charger itself, the electrical circuit, or the vehicle. The next step depends on which one.

Key Takeaways

  • Check the power source first: confirm the outlet has power, the breaker is on, and the charger is fully plugged in before assuming the charger is broken.
  • Write down any error codes displayed on the charger screen, because they tell a technician or your vehicle manufacturer exactly what failed.
  • A tripped GFCI outlet (the kind with TEST and RESET buttons) is common in garages and kitchens and can be reset by pressing the RESET button.
  • If your vehicle will not accept a charge from the charger, the problem may be in the vehicle's onboard charger, not the wall unit.
  • Charger repairs usually require a licensed electrician or the manufacturer's service center, because they involve high-voltage wiring.

Identify whether the charger has power

The charger itself needs power to work. Start by checking whether the outlet it plugs into is live. Plug in a lamp or phone charger you know works. If that device powers on, the outlet has electricity. If it does not, the problem is the outlet or the circuit breaker, not the charger.

Walk to your electrical panel (usually in the garage, basement, or utility room) and look for the breaker labeled for the EV charger circuit. It should be in the ON position. If it is in the OFF position or in the middle, flip it fully to ON. Wait 30 seconds, then return to the charger and try again. If the breaker trips again when ready, stop—this means there is a short or overload in the circuit, and you need an electrician.

If the outlet has a TEST and RESET button (a GFCI outlet), press RESET. These outlets cut power if they detect a ground fault, which is a safety feature but also a common reason a charger stops working. After pressing RESET, try charging again.

Read and record error codes from the charger display

Most Level 2 chargers show error codes on a screen or through LED light patterns. Common codes include "No Ground" (a wiring problem), "Pilot Signal Lost" (the charger cannot communicate with the vehicle), "Over Temperature" (the charger got too hot and shut down), and "Ground Fault" (a safety shutdown). Write down the exact code or describe the light pattern (for example, "red light blinking three times, then pause, then three times again").

Search the charger's manual or the manufacturer's website for that code. Most manufacturers publish a troubleshooting guide that explains what each code means and what to do. If the code is "Over Temperature," unplug the charger, let it cool for an hour, and try again. If the code is "Pilot Signal Lost," the problem is usually in the vehicle or the communication cable between the charger and vehicle, not the charger itself.

Test whether the vehicle will charge from a different outlet

If you have access to another EV charger—at a friend's house, a workplace, or a public charging station—try charging your vehicle there. If your vehicle charges normally at the other location, the problem is your home charger or the circuit it is on. If your vehicle will not charge at any location, the problem is in the vehicle's onboard charger or charging port, and you need to contact your vehicle's manufacturer or a dealer.

If you do not have access to another charger, you can also try unplugging the charger, waiting five minutes, and plugging it back in. Some chargers have a reset sequence that clears temporary faults. Check your manual for the exact steps—some require holding a button for 10 seconds, others require a specific sequence of button presses.

When to call an electrician versus the charger manufacturer

If the outlet has no power, the breaker keeps tripping, or you suspect a wiring problem, call a licensed electrician. These are electrical system issues, not charger issues. An electrician can test the circuit, check for shorts, and repair or replace the wiring.

If the outlet has power, the breaker stays on, but the charger still will not start a charge or displays an error code, contact the charger manufacturer's support line. Have the charger model number, serial number, and the error code ready. Many manufacturers offer phone support and can walk you through additional troubleshooting steps. If they determine the charger is faulty, they will either send a replacement or direct you to an authorized service center.

Some charger manufacturers require that repairs be done by a certified technician, and they may void the warranty if an unlicensed person opens the unit. Check your warranty paperwork before attempting any internal repairs.

Prevent future charger problems

Keep the charger and its connector clean and dry. Dirt, salt, and moisture can cause connection problems and error codes. Wipe the connector with a dry cloth before each use, and store it in a protective case if the charger is outdoors.

Do not leave the connector plugged into the vehicle for days at a time when not charging. This can cause the connector to corrode or the charger to overheat. Unplug after each charge session.

If your charger is outdoors, make sure it is rated for outdoor use (usually labeled "NEMA 3R" or higher). Chargers not rated for outdoor exposure will fail faster in rain, snow, and temperature swings.

Frequently Asked Questions

What does "Pilot Signal Lost" mean and how do I fix it?

The charger cannot communicate with your vehicle. First, unplug the charger from the vehicle, wait 30 seconds, and plug it back in. If that does not work, check that the charging port on your vehicle is clean and dry. If the error persists, the problem may be in your vehicle's onboard charger, and you should contact your vehicle's manufacturer.

Can I use an extension cord with my EV charger?

No. EV chargers draw high current and must be plugged directly into a dedicated outlet. An extension cord can overheat and create a fire hazard. If the charger is too far from the outlet, hire an electrician to install a new outlet closer to where you park.

My charger worked fine, then stopped. What usually causes this?

A tripped breaker or GFCI outlet is the most common cause. Check both before assuming the charger failed. If the breaker or GFCI is fine, the charger may have overheated (unplug it and let it cool for an hour) or developed a fault that requires the manufacturer to diagnose.

How much does it cost to repair an EV charger?

If the charger is under warranty, the manufacturer usually covers the repair or replacement at no cost. If the warranty has expired, repair costs vary widely depending on what failed. An electrician may charge $100 to $300 to diagnose and repair wiring problems. The charger manufacturer can quote repair costs once they know what is wrong.

Is it safe to use a charger that shows an error code?

No. Error codes indicate a safety issue—usually a ground fault, overheating, or communication failure. Do not attempt to charge until the error is resolved. Using a faulty charger can damage your vehicle or create an electrical hazard.