EV Charger Not Charging? Work It Down In Order

You come out in the morning and the car has not charged. Before anything else: this is usually not a broken charger. In our experience of what people describe, the order of likelihood runs roughly car settings, then connector seating, then a tripped breaker, then a genuine charger fault — and replacing hardware is the last thing you should do, not the first.

Work down the list in order. Each step is cheaper and more likely than the one after it. And read the safety section at the end first if anything is warm, discolored or smells of burnt plastic, because that changes the sequence entirely.

1. Check the car, not the charger

This is the most common cause and the easiest to miss, because everything looks connected and nothing is wrong.

Scheduled charging. Most EVs let you set a start time or a departure time, and many are configured that way by default or by a previous setting you have forgotten. If the car is waiting until 11pm and you looked at 10, nothing is broken.

Charge limit reached. If your limit is set to 80% and the battery is at 80%, the car will accept nothing. This one catches people after a long trip when they raised the limit temporarily and then put it back.

Location-based settings.Some cars apply charging rules by location — charge to a different level at home than elsewhere, or only charge on off-peak. A setting made once at a different address can behave strangely later.

The car is in the wrong state. Some vehicles will not begin a session if a door or the charge port is not properly closed, or if a software update is pending.

Check the car’s charging screen and its app before you touch anything else. If you are scheduling from the charger’s app andthe car, note that two schedules can silently contradict each other — pick one and turn the other off.

2. Reseat the connector, and the adapter

Unplug the connector from the car, look at it, and plug it back in firmly until it latches. Look for debris in the pins, a bent contact, or a latch that is not catching.

If you use an adapter — a J1772-to-Tesla or a NACS-to-J1772— reseat that too, at both ends. A partially seated adapter is one of the most common causes of a session that silently never starts: the connection is good enough to look plugged in and not good enough to complete the signaling handshake the J1772 standard requires.

While the connector is out, check that the cable has not been driven over, crushed by a garage door, or left in standing water. Damaged cable is a replace-it situation, not a repair-it one.

3. Read the status lights properly

Every charger signals its state. Do not guess at the colors — find the fault code table in the manual or on the manufacturer’s site, because the same amber light can mean very different things on different units.

Broadly, the fault families are:

Ground fault.The charger has detected current leaking to ground and has stopped, which is the personnel-protection function that UL 2231-listed equipment exists to provide. Sometimes this is moisture in a connector; sometimes it is a genuine insulation fault. Dry everything, try once. If it recurs, stop and get it looked at — the charger is doing its job.

Over-temperature. The unit has throttled or stopped because something got hot. Check for direct sun on the enclosure, a blocked vent, or a warm plug (see the safety section).

Communication error. The charger and car did not complete their handshake. Reseating usually fixes this; so does a power cycle.

No power at all.Nothing lit means the fault is upstream — go to the breaker.

4. Check the breaker and the outlet

Open the panel and look at the EV circuit’s breaker. A tripped double-pole breaker often does not look obviously off — it sits between positions. Push it fully off, then firmly on.

Reset it once.If it trips again, stop. A repeatedly tripping breaker is detecting something: a ground fault, an overloaded or undersized circuit, or a failing breaker. Under NEC Article 625, EV charging is a continuous load and the circuit is sized to 125% of the charger’s draw for exactly this reason — a circuit that keeps tripping may not have been sized for it. Our how many amps guide covers that sizing.

On a plug-in charger, check the receptacle itself. Is the plug fully seated? Does the outlet feel warm? Is there any discoloration or scorching around the slots? A cheap, worn or loosely terminated NEMA 14-50 receptacle is the single most common physical failure point in plug-in EV charging, and it is why electricians recommend an industrial-grade receptacle for this duty. Our hardwired vs plug-in comparison covers that trade-off.

5. Power-cycle the charger

Switch the charger’s breaker off, wait a minute, switch it on. On a connected charger this clears transient software faults and re-establishes the network connection, and it is the equivalent of restarting the device.

If the charger has an app and the app says it is offline, remember that an offline charger usually still charges — losing Wi-Fi should not stop a session, only the reporting and any charger-side schedule. If losing the network does stop your charging, that is worth knowing about your unit, and it is one of the arguments for a charger with no app at all, like the Lectron 40A.

6. Swap one variable

This is the test that ends most arguments, and people leave it far too late.

Take the car to any other charger — a public Level 2 station is fine. If it charges there, your car is fine and the fault is at home. Or plug another EV into your charger, if you can borrow one. If it charges, your charger is fine and the fault is in your car.

Ten minutes of this saves people from buying replacement chargers they did not need.

When the problem is slow rather than absent

A different symptom with different causes. If charging works but is slower than expected, check in this order:

Your car’s onboard charger limit. If the car accepts 32 amps, a 48-amp charger delivers 32. That is not a fault.

The charger’s amperage setting. Adjustable chargers can be set low, and sometimes are, either at commissioning or by a load-management feature doing its job.

Cold. A very cold battery accepts current slowly until it warms, and DOE data shows cold weather substantially increases EV energy use overall. Our cold weather guide covers what to expect and what preconditioning fixes.

State of charge. The last 10 to 20% is deliberately slower on any battery. Our how long to charge guide covers the curve.

Stop immediately if any of these are true

This is the part to act on rather than work around.

• Anything is hot— the plug, the receptacle, the cable, the enclosure. Warm is normal under load; hot is not.
• Discoloration or scorching around a receptacle or on a plug.
• A smell of burnt plastic, at any intensity.
• A breaker that trips repeatedly after one reset.
• Visible damage to the cable, the connector or the enclosure.

In all of these: unplug at the charger if it is safe to reach, switch off the breaker, stop using the equipment, and call a licensed electrician. These are the symptoms that precede real failures, and they are almost always a connection problem rather than an electronics problem — which means they get worse, not better, with use.

Before you buy a replacement

Two things worth doing. Check the warranty — most of the chargers we cover carry three years, and a unit that failed inside that window is the manufacturer’s problem rather than yours. And if the old charger was uncertified, treat the failure as information: our guide to charger certifications covers how to read UL and ETL marks so the replacement is one that has actually been tested.