Vibration When Driving With AC On
#1
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
I have a 2004 Boxster with about 23k miles. All scheduled maintenance done on time at Porsche dealerships. Of late, I have noticed that there is a vibration when I drive with my AC on. It usually happens when I am slowing down or coming to a stop and press the clutch to downshift gears or go into neutral. The vibration occurs momentarily and quickly disappears only to recur again. The vibration doesn't happen when I switch off the AC. Any ideas what it could be? Thanks in advance.
#3
Race Director
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Originally Posted by ranesh
I have a 2004 Boxster with about 23k miles. All scheduled maintenance done on time at Porsche dealerships. Of late, I have noticed that there is a vibration when I drive with my AC on. It usually happens when I am slowing down or coming to a stop and press the clutch to downshift gears or go into neutral. The vibration occurs momentarily and quickly disappears only to recur again. The vibration doesn't happen when I switch off the AC. Any ideas what it could be? Thanks in advance.
Another possibility would be one of the electric radiator fans has a cracked or missing blade and this out of balance condition causes some vibration that is more noticable at slow speeds.
Failing A/C compressor/accessory drive could be another possiblity. Or loose A/C compressor.
Assuming you can't reproduce the symptom with the AC not being on...
If symptoms present when A/C off, then... Well post again if you find this is the case.
Sincerely,
Macster.