I have a 2017 1.2 308 with the auto start stop, however it seems a bit pointless. I understand that it does not work with aircon on, however I was trying it out the other day and the only time it would kick in is if I had the blowers off also. So no airflow through the fan system at all! Which to be honest seems totally ridiculous. Is this correct or do I need to return it again to the dealer?