Hello Volvisti, drive a Volvo XC90 D5 since April 05 and have now programmed the heater for the first time in the last nights. What I notice is that the cooling water is not quite cold anymore and the windows are not fogged/ iced (so it should be), but of pleasant temperature in the car I can’t find anything (even after 60 minutes). Therefore my question to you: Is this normal? If yes, the power to de-iron the windows is sufficient even if it gets really cold (-20°C and lower) ? already in advance thank you for your answers … Gruss Walther