Hissing sound from air conditioner unit

2013 PROTON
7,700 MILES • 1.3L • 4 CYL • FWD • AUTOMATIC
Avatar
DRAMIRUL93
  • MEMBER
  • 1 POST
When turn on the a/c, there will be hissing sound comes from inside dashboard every 1 minute interval, and the air blown somehow not cool as usual.
Another problem is water drop (under bonnet) comes out from a/c system also quite often/a lot compare to normal car air conditional unit.
Compressor sound from engine also quite often, it is synchronized with the hissing sound comes from dashboard.


Is there any problem with cooling coil or thermal expansion valve?
Could you suggest me
Feb 7, 2015 at 12:36 AM
Advertisement
Avatar
KHLOW2008
  • ✓Experienced Mechanic
  • 41,814 POSTS
Have the high and low pressure checked and let us know the actual reading.
Feb 12, 2015 at 10:12 PM
Avatar
STRAILER
  • ✓Experienced Mechanic
  • 55,224 POSTS
To me it sounds like you have a evaporator drain tube that is clogged, here is ahow to find it and unclog it in this vide.

https://youtu.be/q9_MZiS2_NE?si=wdUi_rDAIgP5WA3S

Please go over this guide and get back to us.
Jul 17, 2024 at 10:58 AM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.