Hub · Problems & Fixes
A home charger has a short list of ways to fail, and most of them announce themselves the same way: a dark box, a red light, or a car that gained twelve miles overnight instead of two hundred. This hub works symptom-first — what you are seeing, what it usually is in order of likelihood, the checks that are safe to do yourself, and the line where the job stops being yours. Everything here stays inside what manufacturers’ own troubleshooting guides support; where a manufacturer’s guide says stop and call, so do we.
What this hub covers
- Dead charger: no lights, no hum, no charge — power, plug seating, and the breaker, in that order.
- Starts, then stops: sessions that die mid-charge — latch, schedules, heat, and ground-fault interruptions.
- Breaker trips: what a trip is telling you, why one reset is a test and repeated resets are a hazard.
- Slower than expected: the car’s own ceiling, an amperage setting, heat derating — and load management doing exactly its job.
- Connection and hardware oddities: Wi-Fi and app dropouts, a connector that won’t latch or release, clicking and buzzing, and what error lights actually encode.
Before any symptom below: is the panel itself the real problem? A charger that trips, crawls, or browns out on a full panel is often reporting an electrical-capacity problem, not a charger fault. Run the Electrical Readiness Checker — if the verdict is a tight panel, the fixes in our Electrical Setup hub come before another charger does.
The hard boundary — read this first
Stop and call a licensed electrician, and leave the charger off, if any of these are true: the breaker trips again after one reset; you smell heat, burning, or scorching at the charger, outlet, or panel; you see scorch marks, melted plastic, or water inside the unit; or the fix would require opening the panel or the charger. Manufacturer guides are unanimous on the shape of this line — ChargePoint routes a fault that survives its reset sequence to its support line, Emporia routes persistent fault codes to Support, and United Chargers (Grizzl-E) routes a fault light that survives its reset to its technical support form. None of them asks an owner to open anything. Neither do we.
Charger completely dead
What it usually is, most likely first: (1) the breaker has tripped or is off; (2) on a plug-in unit, the plug is not fully seated in the outlet; (3) a wider outage or a tripped upstream GFCI; (4) an internal fault. Emporia’s own no-power guidance is exactly this order: check the circuit breaker in the panel and confirm it has not tripped, and for plug-in installs verify the plug is fully seated.
Safe checks: Look at the breaker — a tripped breaker sits between ON and OFF. Reset it once: fully OFF, then ON. Reseat the plug firmly. Check whether anything else on that circuit or in the garage has power. What not to do: do not reset repeatedly, do not swap in a larger breaker, and do not open the panel or the charger to “look.” If the one reset does not restore it — or it trips again — that is the boundary above.
Starts, then stops mid-session
What it usually is: (1) the connector latch is not fully engaged, or gets pressed during charging — Emporia states plainly that if the handle is not latched securely the vehicle will not charge, and pressing the latch during charging stops it; (2) a schedule or charge limit — in the car or the app — ends the session on purpose; (3) a heat or ground-fault interruption the charger recovers from or doesn’t; (4) the car itself pausing or finishing early. Grizzl-E’s manuals describe the benign version: a temporary error interrupts the session, the unit self-monitors, and charging auto-restarts when the condition clears.
Safe checks: Unplug, inspect the connector and port for dirt, moisture, or damage, and reseat until the latch clicks. Check the car’s charge limit and timers, and the app’s schedule and demand-management settings — Emporia’s troubleshooting table lists vehicle settings and app schedules as the first suspects when a car does not charge. Try one clean session with schedules off everywhere. What not to do: do not hold the latch down, tape anything, or defeat a ground-fault reset — a charger that keeps interrupting is reporting something.
Breaker trips
What it usually is: (1) the charger’s amperage is set above what the circuit supports — a 48-amp setting belongs on a 60-amp circuit, not a 50; (2) something else shares the circuit and the combined draw exceeds the breaker; (3) a ground fault the breaker or the charger’s own protection is catching; (4) a failing breaker or a loose connection heating up — the two causes you cannot see from outside.
Safe checks: Read the charger’s amperage setting in its app and compare it to the breaker size — the setting must be at or below 80% of the breaker rating for continuous charging. Confirm nothing else runs on that circuit. Reset the breaker once and watch one session. What not to do: never upsize the breaker to stop trips — the breaker is sized to the wire, and the trip is the system working. A breaker that trips a second time, trips instantly, or feels warm is an electrician call, full stop.
Much slower than expected
What it usually is: (1) the car’s ceiling, not the charger’s — ChargePoint’s own troubleshooting names the vehicle’s maximum AC rate and the charger’s amperage setting as the two checks, and Emporia’s table says the same: amperage limit set in the app or in the vehicle; (2) an app-side amperage trim left low after install; (3) load management doing exactly its job — a PowerSmart- or sharing-managed charger deliberately slows when the house or a second car needs the capacity, then speeds back up; that is the feature working, not a fault; (4) heat derating — chargers protect themselves in hot enclosures: Emporia publishes an operating range up to 122°F (50°C) and a fault code for exceeding nominal temperature, and Grizzl-E’s fault list includes a high-temperature code as well. A sun-baked garage at 4 p.m. can honestly cost you speed that returns at midnight.
Safe checks: Compare the delivered kW in the app against the car’s rated AC maximum, not against the charger’s headline. Check the amperage setting in the app. Note the time and temperature when it slows. The full speed model — what each circuit size delivers in miles per hour — is in Charging Speed & Cost. What not to do: do not raise the amperage above the circuit’s rating to chase speed.
Wi-Fi or app keeps dropping
What it usually is: (1) weak signal at the garage — Emporia’s guidance is to confirm the charger is within range of your 2.4 GHz network, the band these chargers use, and Emporia’s LED guide decodes the symptom: solid red Wi-Fi light means not connected to the router, flashing red means the connection was lost; (2) a router change, new password, or a router reboot the charger did not rejoin after; (3) an app-side stale state that a restart clears. ChargePoint notes the practical comfort: if Wi-Fi is down, its Home charger still charges on schedule or when you plug in.
Safe checks: Check your phone’s Wi-Fi strength standing at the charger. Confirm the charger is on the 2.4 GHz band, restart the router once, and re-run the charger’s Wi-Fi setup in its app if it does not rejoin. What not to do: do not factory-reset repeatedly or move the install — a charger that charges fine offline has an annoyance, not a failure; antenna and router placement are the durable fixes.
Connector won’t latch — or won’t release
What it usually is: for latching — debris, ice, or a misaligned insertion; Emporia’s guidance starts with the latch itself: it must lock into place or the vehicle will not charge. For release — the car still has the port locked: most EVs lock the connector while charging and some keep it locked until the car is unlocked or charging is stopped in the car or app.
Safe checks: Stop the session in the app or car first. Unlock the car. Inspect the connector and port for foreign material — Emporia’s fault guidance for several codes is exactly this: unplug, disconnect power, confirm no visible damage or foreign material in the connector, then restore power. Reseat firmly until the latch clicks. What not to do: never force, pry, or pull hard on a stuck connector, and never drive against a connected cable — if it stays stuck with the car unlocked and the session stopped, the car’s manual has a model-specific manual-release procedure; use that, not leverage.
Clicking or buzzing sounds
What it usually is: a single click at plug-in and at session start or end is the contactor — the relay that connects power — and is normal on every brand here. Grizzl-E units pair their fault beeper with red flashes: United Chargers documents the beep count matching the flash count to identify the fault, which turns an alarming noise into a readable code if you count it. Safe checks: Note when it happens (start, end, or mid-session), whether a fault light accompanies it, and count flashes or beeps if present — that count is what manufacturer support will ask for first. What not to do: a loud, continuous, or growing buzz, especially with heat or smell, is not a “sound to monitor” — stop the session, switch the breaker off, and treat it as the boundary case. Do not open the unit to find the noise.
Error lights
What it usually is: the light is a code, not a mood. ChargePoint states it directly: a red front LED means a fault has been detected and the car will not charge, and its published clearing sequence is (1) unplug and replug the connector, (2) reboot the station from the app’s settings, (3) flip the breaker — then call support if it persists. Emporia encodes faults as counted orange flashes (slow count, then fast count) covering, among others, over- and under-temperature, voltage out of range, current leakage, short circuit, over-current, and a charger that is not grounded — each with a published corrective action, and “contact Support” as the ending for the serious ones. Grizzl-E encodes faults as counted red flashes — lost ground, GFCI leakage, stuck relay, high temperature, over-current among them — with a reset procedure of unplugging the car, switching the breaker off, waiting 1–2 minutes, restoring power, and contacting United Chargers if the light remains.
Safe checks: Count the flashes before you reset anything — the count is the diagnosis, and resetting first erases it. Then follow your own brand’s published sequence, once through. What not to do: do not loop the reset sequence hoping for a different result, and do not keep charging through a recurring ground-fault or leakage code — those two are the charger doing safety work.
Electrical Setup
Circuits, breakers, and panel capacity — the install side most charger problems trace back to.
Hardwired vs. Plug-In EV Chargers
Which connection ages better, which GFCI rules apply to each, and why some “charger faults” are really outlet faults.
Install Cost Guide
What the electrician’s visit costs when a problem does cross the line — priced line by line, before you call.
Best Home EV Chargers
When the verdict is replacement, the five chargers we score head-to-head — and the panel question answered first.
Troubleshooting steps checked November 10, 2026, against manufacturers’ own guidance: ChargePoint’s Home troubleshooting page (chargepoint.com), Emporia’s Classic fault-code and LED guide and charger manual troubleshooting (help.emporiaenergy.com; emporiaenergy.com), and United Chargers’ Grizzl-E fault-indicator and reset documentation (autochargers.zendesk.com). Your charger’s own manual is the final word for its model — fault codes differ by brand and generation.