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Hi all,

I had a new air con system (vague wording but it cost $2,000 so I assumed all parts were renewed) installed in my 2003 996 Carrera at the main OPC. It ran well afterwards. I then had a 100,000km main service soon afterwards (about 500km later) and it continued to run well. I then had a battery warning light come on and then the car started booming, the battery indicator in the dash going up and down by about 1.5 volts, the indicators flashing fast as it a bulb was blown, and the rev counter idle started to hunt by about 400rpm up and down. The car would make a louder sound with the air con on and I can feel the vibration in the peddle and steering wheel with the air con on, also I can hear a tapping sound from the centre of the dashboard. I can only describe it like a booming throbbing headache. When the air con is off it still idles a bit rough.

I had a new alternator fitted (I already fitted a new battery about 9 months ago) but the car still makes a louder sound with the air con on and I can still feel the vibration in the peddle and steering wheel with the air con on, also I can hear a tapping sound from the centre of the dashboard. When you switch the air con off all is well and the tapping noise slowly subsides over about 10 seconds or so until it is silent again. The idle without aircon still feel a bit rough, not as smooth as I remember it before all the work was done. All points to the air con, but the temperature in Kuwait is 40c at the moment so I need it on (it'll rise to 55c in a few months(!),

Please help. The dealer will fix it I just need to tell them what to do.



Edited by msaif
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