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Air Conditioning backfiring noise
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cargal
New User
Aug 5, 2012, 5:30 PM
Post #1 of 6
(2431 views)
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Air Conditioning backfiring noise
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Hi
I have a 2000 Nissan Altima 4 cylinder with 112,000 gentle miles. A couple months ago I noticed an intermittent noise that sounded like a chirpy- psst sound coming from the exhaust system. Since then have noticed it only happens when the air conditioning is on. Any ideas what this might be would be welcome. It's one of those things that if I take it to a garage and the mechanic will do a test drive, it won't happen til he leaves the car:):)
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Discretesignals
Ultimate Carjunky
/ Moderator
Aug 5, 2012, 5:39 PM
Post #2 of 6
(2423 views)
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Re: Air Conditioning backfiring noise
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Do you hear it from inside the vehicle or outside the vehicle?
Does it make the noise when the vehicle isn't moving?
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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Hammer Time
Ultimate Carjunky
/ Moderator
Aug 5, 2012, 5:40 PM
Post #3 of 6
(2420 views)
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Re: Air Conditioning backfiring noise
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Pretty impossible to diagnose a noise over the Internet. could be a belt, tensioner, A? comprtessor or about a dozen other possibilities. It really needs to be checked out more thoroughly by a tech.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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cargal
New User
Aug 6, 2012, 6:25 AM
Post #4 of 6
(2377 views)
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Re: Air Conditioning backfiring noise
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I can hear it inside the vehicle with radio off. I don't think it's ever happened when the vehicle is stopped.
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cargal
New User
Aug 6, 2012, 6:29 AM
Post #5 of 6
(2376 views)
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Re: Air Conditioning backfiring noise
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Funny you mention belt because when I start the car with a/c on there seems to be a squeak that I don't remember being there. I had the serpentine belt replaced a few months back. Do you think there's any connection? I will probably have to take it in to be looked at but I'm just trying to get a little knowledge before I go in.
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Hammer Time
Ultimate Carjunky
/ Moderator
Aug 6, 2012, 9:01 AM
Post #6 of 6
(2371 views)
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Re: Air Conditioning backfiring noise
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I'd take it back to the guy that did the belt and tell him it's making noise. Let him prove otherwise.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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