I posted this under another discussion "couple of issues" but wanted to give it a bit more attention so I can get some feedback. We live in NYS about 1hr north of NYC. We have a 2019 Kona EV Limited. My wife drives the car mostly and mostly to work and back, about 25 miles each way. We got the car in early September and as the weather started to cool, we noticed that the heat would not stay on for very long—after about 10-20 miles the heat would stop and the car would blow cold air (no matter how high the temperature is set). The heat works fine when you first start the car and is fine around town. But as soon as it is driven at least 10 miles or more, the heat stops coming out and only cold air blows. We have We have tried varying the settings, changing into different drive modes, turning the temperature as high as it will go, manually turning on the heat, using auto climate control and re-circulation, toggling the button, you name it, but once the heat stops there is no way to get it to come back on until the car is shut down and re-started. We finally took the car into a local Hyundai dealer and after two days they can't figure out what is wrong—they were able to re-create the problem by driving the car about 10 miles or so. They had to call Hyundai for ideas and Hyundai suggested draining anti-freeze to see if a bubble was interfering with something (no luck). At the end of the day they called to say that Hyundai then asked what the State of Charge was. When I dropped the car off, it had about 80 miles and maybe 4 white bars. Not sure how low it was when the dealer asked Hyundai, but they (Hyundai) said as the car loses its charge some systems like heat start to shut down. I don't yet know how low the dealer got the battery, but they wanted to charge overnight to see what happens with a full-charge. Unless the battery is in the red, I hope that heat or AC doesn't start to shut down around 80 miles or so. We haven't paid close attention to the battery level and whether or not we have heat (it hasn't been that cold yet), but we also haven't let the battery go into the red either. It also seems that if this was the case, plenty of people would be complaining. And yet, I can't find much online about this. I keep thinking it has to do with the temperature gauge/thermostat in the cabin--that perhaps the air reaches the target temperature and then is turning off the heat and then it stops working. They haven't checked that yet, but the dealer thought it was an interesting theory. In any case, sorry for the long post, but is anyone else having anything like what I described? Any suggestions?