Why Does My EV Charger Make a Clicking Noise?

Plugging in your EV should be simple—connect the cable, start charging, and walk away. But what if your EV charger starts making a clicking noise? Is it normal, or a sign of trouble?

The good news: in most cases, clicking sounds are perfectly normal. But sometimes they can point to an issue with your charger, wiring, or even your EV itself.

This guide explains what causes EV chargers to click, when to worry, and how to fix the problem.

Is Clicking Normal for an EV Charger?

Yes, in many cases. EV chargers contain internal relays—electrical switches that safely turn power on and off. When you start or stop charging, you may hear one or more clicks as those relays engage or disengage.

This is similar to the clicking sound you hear from appliances like air conditioners or refrigerators when relays activate.

So, if you only hear a brief click when plugging in or unplugging, that’s usually nothing to worry about.

Common Causes of Clicking Noises in EV Chargers

1. Relay Switching (Normal)

• What it sounds like: A single click or two when charging begins or ends.

• Why it happens: The charger is engaging or disengaging its internal safety relays.

• Fix: None needed—this is a normal sound.

2. Breaker or GFCI Protection Engaging

• What it sounds like: Repeated clicks, often paired with charging interruptions.

• Why it happens: The breaker or built-in safety shutoff is tripping and resetting.

• Fix: Inspect your circuit. If this happens often, have an electrician check the wiring and breaker capacity.

3. Loose Plug or Connection

• What it sounds like: Sporadic clicks during charging, sometimes accompanied by power loss.

• Why it happens: A loose connection creates electrical arcing, which can make a clicking or popping sound.

• Fix: Make sure the plug fits securely. Replace any damaged or worn outlets.

4. Overheating Charger

• What it sounds like: Intermittent clicking as charging starts and stops.

• Why it happens: Some chargers click when shutting down due to heat protection.

• Fix: Improve ventilation, avoid coiling the cord, and have the setup inspected for undersized wiring.

5. Vehicle-Related Noise

• What it sounds like: Clicking from the car itself during charging.

• Why it happens: Some EVs make clicking or clunking sounds as onboard relays and contactors manage power flow.

• Fix: Check your owner’s manual—this is often documented as normal behavior.

6. Failing Charger Components

• What it sounds like: Repeated or loud clicks even when not starting/stopping charging.

• Why it happens: Internal components like relays or capacitors may be failing.

• Fix: Replace the charger, especially if it’s an off-brand or older model.

When to Worry About Clicking Sounds

Clicking alone isn’t usually dangerous, but you should pay attention if:

• The clicking is constant during charging

• Charging frequently stops and restarts

• You notice a burning smell, heat, or scorch marks

• The charger is older, damaged, or from a no-name brand

These are signs of a potential electrical problem that requires attention.

How to Fix or Prevent EV Charger Clicking Issues

• Make sure your charger is installed on a dedicated circuit

• Inspect plugs and outlets for wear or looseness

• Keep cables straight and ventilated to prevent overheating

• Use a UL-certified, brand-name charger

• If in doubt, call a licensed electrician to inspect the setup

Final Thoughts

A clicking sound from your EV charger is often normal relay activity—just part of how the charger safely manages electricity. But if the clicking is constant, paired with overheating, or stops your charging sessions, it’s time to investigate further.

At Frisco EV Charger Installation, we help homeowners install safe, reliable charging stations that operate quietly and efficiently.

👉 If you need help with EV charger installation in Dallas, Plano or the surrounding area, contact us today for a free consultation and enjoy worry-free charging.