Heres been -10 C for two nights and -6 C for two days at my place in Sweden and our Prius PHV 2018 has been standing still for two days.
When I started the car today it was fully charged and when I drove away there wasnt any heat from the fan/ac .
When I pushed the defrost fron button the ICA whent on and after a while the heat began to come. Maybe the car cant manage to deliver heat when running on pure EV, at that low degrees.
I drowe some days ago when it was -3 C outside temp