Hissing sound from air conditioner unit

2013 PROTON
7,700 MILES • 1.3L • 4 CYL • FWD • AUTOMATIC
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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 8:36 AM
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KHLOW2008
  • ✓ASE Certified Mechanic
  • 41,814 POSTS
  • ASE Certified Mechanic
Have the high and low pressure checked and let us know the actual reading.
Feb 13, 2015 at 6:12 AM
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STRAILER
  • ✓ASE Certified Mechanic
  • 54,832 POSTS
  • ASE Certified Mechanic
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 5:58 PM
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