The ac/heater on my mazda tribute only blow air when is on the highest setting. It just started doing this about a month ago before that i noticed that whenever i turned the ac or heater onn it would make kind of a squiki sound like a ballon when is letitng air out then all of a sudden it quit making that sound but nowit only blows air when i have it on the highest setting. i also notice that it when i turn the egine onn it leakes water not inside the car but outside towards the passnger side. can this be someting serious or just a simply fix?