Hi bro, am driving 6 years old Kenari which never service the aircond before...now, the aircond still feel cold at night/rainy day but a bit warm during noon, then when i switch to the max which i can heard a very strong blower sound but the aircond 'wind' is not strong enough...lastly, when am stuck in traffic jam or never move for some time then the aircond will turn to warm.....so what is the advise for this matter & how much will need to spend on this?

Thx