Author Topic: Air con squeek and jerk - 2.litre sport disi  (Read 4156 times)

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Offline BlackCloud

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Air con squeek and jerk - 2.litre sport disi
« on: July 24, 2014, 02:17:24 PM »
Hi, first post here and just checking if I have an issue or not?  It's a late 2009 petrol sport 2 litre with climate.

The air con is working fine but I can hear it cycling every 30 seconds or so with a pronounced squeak sound and also makes the car jerk/hiccup.  This is particularly noticeable with the engine trundling along in the urban commuter traffic, low revs or under acceleration.  I know the compressor takes a lot of energy kicking in so I understand the jerk, but surely this isn't acceptable? (My ten year old Focus didn't have climate control but the AC didn't do this.)

So... a couple of questions if anyone can help.  Is the jerk normal, and is it normal to hear the squeak?

Secondly, is an air con recharge likely to help the issue with fresh topped up gas and lubricants? 

My car bought secondhand is under Mazda warranty.  Whilst I'm tempted to book it in, it's a bit of an inconvenience, especially if this is just how it is.  Thanks for any advice.

Offline Willpower

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Re: Air con squeek and jerk - 2.litre sport disi
« Reply #1 on: July 24, 2014, 03:01:12 PM »
The power drag when the compressor kicks in is normal, every air con system does it. Some are more noticeable than others. I had a Laguna once that was really bad.
What you mean by a jerk/hiccup could be appreciable to you but acceptable to others. The squeak is not normal. Not sure what would cause it unless it is the drive belt slipping. Unlikely in this warm weather.
Regas and lubrication is one option.

Is the Air con pushing out cold air ?
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Offline BlackCloud

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Re: Air con squeek and jerk - 2.litre sport disi
« Reply #2 on: July 24, 2014, 03:07:18 PM »
Yes, it appears to be working fine although I don't know if it is working optimally.  It's an almost 5 year old car so I'd guess a recharge would help anyway.

The hiccup is reasonably pronounced, like a missed heartbeat, hiccup.  The squeak is quite audible driving along in the traffic, window open (to check). 

Offline Willpower

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Re: Air con squeek and jerk - 2.litre sport disi
« Reply #3 on: July 24, 2014, 03:13:16 PM »
The "hiccup" sounds normal. Is the squeak constant or occasional ?   If you don't use the Air Con for a long period then the seals inside the compressor do have a tendency to fail due to hardening. Approximate cost of a new compressor is £700

Being a 5 year old car a re-gas could be worth it. It's not that expensive considering the benefits. And might just solve your problem.   
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Offline BlackCloud

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Re: Air con squeek and jerk - 2.litre sport disi
« Reply #4 on: July 24, 2014, 03:25:41 PM »
The squeak is with the hiccup, as it kicks in and cycles, approx. every 30 secs.

The car is under Mazda warranty, I'd sooner it be a problem that is replaceable rather than possibly delaying it to break when the warranty expires  :)

Offline Willpower

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Re: Air con squeek and jerk - 2.litre sport disi
« Reply #5 on: July 24, 2014, 03:27:21 PM »
I assume that is an extended warranty. If so check the wording carefully before you take it in.
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Offline speedy mazda

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Re: Air con squeek and jerk - 2.litre sport disi
« Reply #6 on: July 24, 2014, 05:43:52 PM »
hi sure its not your ac clutch thats squeaking  might account for the drag when you turn on the ac. theres some utube videos of ac clutch problems  if any help.

Offline BlackCloud

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Re: Air con squeek and jerk - 2.litre sport disi
« Reply #7 on: July 24, 2014, 05:48:27 PM »
Ah, well having done a bit on net research that's the route I was thinking but was hoping someone a bit more conversant with the Mazda would offer some advice in that direction.  i.e what is it likely to be, and will a recharge gas solve it with new lubricant.  Alternatively, if this is potentially a terminal problem for the ac compressor, then it may be a warranty job?  (The warranty is secondhand approved Mazda btw).

Offline speedy mazda

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Re: Air con squeek and jerk - 2.litre sport disi
« Reply #8 on: July 24, 2014, 06:29:19 PM »
good luck with your approved used warranty  they never did solve my noises even after new driveshaft.

Offline Willpower

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Re: Air con squeek and jerk - 2.litre sport disi
« Reply #9 on: July 24, 2014, 06:59:56 PM »
As suggested, it could be the clutch. This can be bought as a separate component. However there is a catch 22 situation.

Unfortunately there is no test beforehand to determine which is the faulty item.
So you get the clutch replaced with the labour costs involved and hope that it solves the problem.  However. If the squeak is still there then it's the compressor. The catch. if you buy a new compressor it comes complete with a new clutch. So you will have laid out the costs for a new clutch for nothing and will have to stump up again.
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Offline BlackCloud

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Re: Air con squeek and jerk - 2.litre sport disi
« Reply #10 on: July 24, 2014, 10:17:21 PM »
So, would it be fair to say the consensus is that there is likely a fault, the compressor or the clutch, worth pursuing under the warranty? 

Offline Willpower

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Re: Air con squeek and jerk - 2.litre sport disi
« Reply #11 on: July 24, 2014, 10:58:46 PM »
If you call a consensus two people, then yes. Unless you want to wait for some more answers.

However, as I said before check the wording of your warranty. Make sure the AirCon is covered and that you meet the criteria required before you try.
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Re: Air con squeek and jerk - 2.litre sport disi
« Reply #11 on: July 24, 2014, 10:58:46 PM »