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Dripping sound behind dashboard

(2008 Nissan Altima)
in Dungannon, VA on April 10, 2010
Hi guys.

Whenever i turn on the AC and leave it for a while, i start hearing DRIPPING sound from behind the AC vents in the middle and it surrounds to driver side...

It is normal or something is leak inside?
If i dont turn on the AC, the sound doesnt come for days but as soon as i turn on the AC for a while, the sound starts coming.

Is it AC water leaking inside dash and HOW CAN I FIX IT?
Displaying 2 answers & 3 comments
Popular Answer
on April 13, 2010
This is a weird problem. A dripping noise wouldn't seem to be loud enough while driving or with the fan on to be able to hear it. Is it possible you are hearing a click noise or something else?
on April 13, 2010
Thanks for the info, that helps a lot. I check for technical bulletins from Ford and found nothing related to this issue. I would start by checking the evaporator drain, since it sounds like it may be plugged. I don't know where it is on this car, but if you look under the dash and climate assembly, look for a hose or pipe that attached to the floor or firewall to the assembly. It should be #2 in this picture:
Good Luck!
on April 13, 2010
It is when i keep the AC on for 15-20 mins and then turn off the engine, the sound comes like a water drop is falling on platic sheet... like TICK TICK TICK literally.. also i can hear it with engine running, ac on low speed... if i concentrate i can hear.

its like behind the speedometer or the center AC place. There is no water on the carpet neither any sign of water drops.. just the sound...

But AC water isnt draining outside the car.
on June 21, 2010
Did you ever find the answer to the question? I drive a Yukon and the same thing is going on with my car. The "low coolant" light comes on after I've been driving a while, but my coolant doesn't appear to be low.
on June 22, 2010
No, i never found out what it is. I took it to Nissan dealer as well, they said they can not find anything and nothing is leaking behind the dashboard otherwise it would leak onto the carpets (floor mats) on the car, either frm drviers side or passengers.

So i've just learned to drive and live with the sound that comes and ignore it. :)

But i think your problem must be different if low coolant guage comes on.

Do u see any water leak in the passengers side cabin or drivers side?

Do something, get down, like bend down and take your hand up from under the drivers side under the steerring there is opening in the dashboard... check if u feel any water..

If there is coolant leak there, you can smell something sweet, because coolant does go behind the dashboard for car's heating thingi.

let me know..

Good luck
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Hi guys. Ill explain my problem once again. If i turn the AC on for about 5-10 mins, I hear water dropping sound ....
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