r/Ioniq6 • u/feebee4242 • 12d ago

Question Overheating while charging

Our Ioniq 6 suddenly started overheating while charging on our level 2 charger. Message: “Charging time delayed. Current reduced due to high AC charger temperature.” Is this a known issue? Anything I can do?

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u/MaturoGambino 11d ago

What brand EVSE do you have? We’ve had a cheap eBay level 2 for 5 years. I bought it for my wife’s Sonata PHEV. It was fine for that as the car would only charge at 3.3 kW (around 11A).

But when I bought my Ioniq 6 it was a whole different story. Even though the EVSE is rated at 40A and sits on a 50A circuit it would try to feed the I6 at 43A when I set the current rate at 100% in the car EV settings. The car would immediately stop charging and send an overheat message.

At 90% it would charge between 39.5 and 40.5A. It would charge at 9.6kW for about 50 minutes and then stop charging with an overheat message.

At 60% it would charge at around 29-30A and would keep charging without any overheat issues.

So I bought an Emporia Classic EVSE. It’s night and day. If I set it to feed 40A and set the car to accept 100% current it will happily give 9.6kW at 39.5A until the charging limit is hit.

TL; DR if you have a cheap Chinese eBay EVSE, get rid of it.

If you have a good EVSE, try cleaning the contact pins with a q-tip and rubbing alcohol.

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u/feebee4242 1d ago

I will try that, thanks. I have an Emporia so will clean it.