AC Whistling?

[ErrorF002]

I have searched through the forum and no one seems to have this issue. I have a 2003 Toyota Camry 4 Cylinder. I am the sole and single owner. I had the engine replaced with a 2004 Camry engine due to oil sludge. This issue has persisted through both engines.

Occasionally my car will whistle.

• It is brief and goes from a low pitch to a higher pitch.
• It is loud inside the car, but barely audible outside with the hood up
• It only happens the moment the compressor is engaged (or disengaged?)
• Never happens when the AC is off.
• If I turn off the AC or the car, after some use of the AC, the whistle is extended and sloooowly raises in pitch till it stops
• Happens a lot more when I idle.

Any ideas? I am totally taking this to CarTalk just to give Click and Clack something to laugh about if it isn't a common issue.

Your help is appreciated.

On an a side note. I tried to access the repair manuals... no luck from the sticky posts. Can anyone point me in the right direction.

[20camry00]

I am having same problem as well. mine is 2000 and does the same thing when AC is on. I am guessing problem is low refrigerant.

[njerald]

Serpentine belt..........but you would definitely hear it with the hood open.

Does the sound change with different A/C fan speeds?

[20camry00]

not the belt.
mine feels mor like high pressure releasing

[ErrorF002]

Originally Posted by njerald

Does the sound change with different A/C fan speeds?

It is not affected by fan speed. The sound will occur even after I turn the car off.

[BlackCamSe]

maybe its a vacuum leak?

[brianm4]

Did you ever find out what was causing this? I have the same problem with my 2003 LE!

Thanx