Thanks bro. So its also normal that if I loose radiator cap then some coolant spills out? As I heard the reservoir bottle is there to release the pressure so it should not come out from radiator cap.
Actually I was kind of afraid as this happened with my mehran earlier. I just changed its fan to auto and it was working fine. When needle was to pass mid mark, fan started. But after one week while driving back to home I saw needle all the way to the max and steam from radiator even fan was running ... I changed it back to direct and never opted for auto again in my Mehran.
So wanted to double check before heating up my cultus too ... Will test with AC on today at 2000 rpm or a little trip and report back if feel something odd.
Also planing to install a manual switch so if want to make it direct I will not have to join the cables and re-tape them