@Eric648 Do you have any video cameras at any of your properties? That's often the reason listings are suspended, even if they're disclosed in your listing and completely ethical (like an outdoor camera or Ring doorbell). It could also be due to one of your recent guests who didn't have heat overnight if they made a complaint to Airbnb: they might consider that to be enough of a safety issue to shut you down.
There's not much you can do apart from wait for a call. You defintely won't get an apology: Airbnb will suspend your listings until you're proven innocent. It's just their policy. I think it's very wrong, but that's what they do.