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View Full Version : Heat & A/C Does anyone ever hear a hissing sound from A/C Dryer/Accumulator after shutdown??


rothsean
08-30-2014, 10:14 PM
I noticed it today, a hissing sound for about 10 seconds after I turn the car off, after I had A/C running.

Hissing sound comes from where the accumulator/dryer is located in front wheel well.
lindbergh
08-31-2014, 12:12 AM
Mine does the same thing.
Kenny_Z
08-31-2014, 08:21 AM
I've always thought that was a pretty standard thing from cars with vacuum run mode selector switches. I've come to miss that sound on newer vehicles. I could be completely wrong though. I'm fairly weak when it comes to AC system knowledge.
hmcelraft
08-31-2014, 09:22 AM
It is the sound of the high/low pressure stabilizing at the orifice tube. It lasts a few seconds. If it lasts for a bit it can indicate a plugged orifice tube.
rothsean
08-31-2014, 10:14 AM
It is the sound of the high/low pressure stabilizing at the orifice tube. It lasts a few seconds. If it lasts for a bit it can indicate a plugged orifice tube.

I got to thinking about it last night, and that is exactly what I came up with, makes sense...


Thanks all for replies.