Q: Noise while air conditioner is running on 2008 Acura TSX

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
My 2008 TSX started making a sort of high pitched "whoop!" sound when the AC is running on number 1 or 2 setting. I thought the noise was only audible from inside the car but you can also hear it from the outside as well, quite embarrassing at a red light. however, i had it in to the Acura dealer and notified them of the problem, and just like all other mysterious car noises they could not get it to do it. Any ideas on what this could be??
(3) Answers
(4) Comments
its the a/c expansion valve pain in the butt to change its a 3-4 hour job the evaporator must come out under the dash if you can put up with the noise leave it no harm i have done a ton of these . 30 year honda tech
I have the same woop sound. But only happens when it's raining or rain. I had a clog in the sun roof drainage but that is ok now. Don't know what's causing it.
I just bought a 2008 Acura TSX, and I sometimes hear a high pitched "whoop!" sound with or without radio on. Look forward to hearing about possible cause!