Try to check if the exhaust of the aircon is closing or not, below the windshield, remove the black color plastic cover on the right side and from there you can see and check whether it is closing or not.
Linawin ko lang po sir, below the WS po ba or below the dashboard, wla kc ako makita dun sa description nyo. Bka nmn po pde makahingi ng picture for reference. Salamat po.
Sec. Dizon and RSA seem to have a really good working relationship, btw.
EDSA Rehab/Rebuild and Guadalupe Bridge Repair