I have a quick question... and have an idea of how to say it, but would like to hear from you how to say, that "My underfloor heating is not working well" or "The underfloor heating is not working" [this is what's happening in my apartment now lol!].
So, could I say, "온돌 마루 고장 났어요." ??
Your help would be appreciated!
Thanks,
B