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20th January 2020, 14:30 | #1 |
same car since 2005
2001 Rover 75 2.0 v6 Connoisseur Saloon Join Date: Nov 2006
Location: Ellesmere Port , Cheshire
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Air con noise - any ideas ?
I have a growling noise when my aircon ( climate control version ) is running .
It seems to come from under the dash , but that may be my hearing , and sort of varies with engine speed , but not conclusively It is not present when I am just running the demist function . With the bonnet open , the noise does not appear to be coming from the compressor . I am due for a regas , so I will get that done shortly and see if it helps , but I wondered if anyone else had had such a noise and had any ideas ? Is there anything under the dash which might growl on aircon setting but not on Econ setting ? The aircon generally works well .
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20th January 2020, 14:59 | #2 |
This is my second home
Rover75 and Mreg Corsa. Join Date: Nov 2006
Location: Sumweer onat mote o'dust (Sagin)
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The common 'whaling'/whooping sound produced by the aircon system comes from the Thermal Transfer Valve (TXV) and indicates there's either insufficient gas or insufficient condenser capacity. The aircon service people should be able to diagnose it if it's other than a gas shortage.
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20th January 2020, 15:03 | #3 |
same car since 2005
2001 Rover 75 2.0 v6 Connoisseur Saloon Join Date: Nov 2006
Location: Ellesmere Port , Cheshire
Posts: 3,811
Thanks: 379
Thanked 549 Times in 466 Posts
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Thanks T-Cut , but I am familiar with the whooping noise you refer to , and this is not it The noise I have is a constant growling sound .
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Who said it was simples ? |
20th January 2020, 16:36 | #4 |
This is my second home
Rover75 and Mreg Corsa. Join Date: Nov 2006
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20th January 2020, 16:38 | #5 |
This is my second home
Rover 75 CDT-2001 Join Date: Jan 2009
Location: Wrexham, North Wales
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I had a similar growl, and Jules attended to it for me. Turned out to be a seized compressor. I was due for new belts after 190k miles from new, so he sorted it all at the same time.
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20th January 2020, 18:46 | #6 |
This is my second home
R75 Saloon. Join Date: Feb 2009
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20th January 2020, 18:53 | #7 |
same car since 2005
2001 Rover 75 2.0 v6 Connoisseur Saloon Join Date: Nov 2006
Location: Ellesmere Port , Cheshire
Posts: 3,811
Thanks: 379
Thanked 549 Times in 466 Posts
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My aircon is working ok . I'm guessing that if your compressor was seized then yours wasn't working ?
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Who said it was simples ? |
20th January 2020, 18:55 | #8 |
same car since 2005
2001 Rover 75 2.0 v6 Connoisseur Saloon Join Date: Nov 2006
Location: Ellesmere Port , Cheshire
Posts: 3,811
Thanks: 379
Thanked 549 Times in 466 Posts
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I've had noise from the flap before , but not sure about the recirculation motor ? I will need to read up
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Who said it was simples ? |
20th January 2020, 19:16 | #9 |
This is my second home
R75 Saloon. Join Date: Feb 2009
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The flap shuts off any intake of air from the outside.
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20th January 2020, 19:29 | #10 |
same car since 2005
2001 Rover 75 2.0 v6 Connoisseur Saloon Join Date: Nov 2006
Location: Ellesmere Port , Cheshire
Posts: 3,811
Thanks: 379
Thanked 549 Times in 466 Posts
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I've done a bit of reading-up in Rave , and have learnt that in Auto mode the blower motor in the dash alters its speed according to vehicle speed , to maintain appropriate cooling through the evaporator . This does not apparently occur in Econ . Sounds interesting ? I shall tinker with the blower speeds whilst driving in auto mode and see if this affects the noise ………………….
I'm not ruling out that it just needs a re-gas and fresh lubricant !
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Who said it was simples ? Last edited by chris75; 20th January 2020 at 20:01.. |
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