Oh thanks for your reply, right, I only press the indoor air circulation mode when the AC is on, and switch it off with the air con when not in use. I've never done otherwise with any previous car. I'll see if your tip works, thanks again.

Your "less probable" is right, my car is not old (deeh 3aroosa).............fiat 128 last year’s model فابريقة
lol
Salam