I drove a Renault Zoe around Stockholm in the middle of winter. Great car, except for the heating... takes a long time for it's little heat pump to warm up.
Is that an all electric car? Petrol combustion gives off a lot of heat, but if the thermostat is stuck open this works against the goal - modern vehicles will set a fault in this case because slow warm up causes more fuel to be burned and emissions to be expelled.