A/C Doesn't Work For Long When Hot

Puffster · Jun 27th, 2018, 15:16

So, get in the hot car, start her up, cold air starts coming out, drive off and then it slowly turns warm air

Had her gassed as that's normally the sign and it was still cold to start with, 300m down the road and its warm again

Outside temp was over 25C

Next day drove 500 miles with an o/side temp of max 22C and it was cold as anything.

Now I did try and start up outside my house and sit there for a wee while and sure enough, after about a minute I heard a "clunk" from somewhere and then the warm air started again.

Anyone any ideas?

jonnyf90 · Jun 27th, 2018, 15:40

Air Con condenser clutch?
My 1996 960 has a very audible "clunk" when the clutch engages

Cheers

Model flyer · Jun 27th, 2018, 18:52

Quote:

Originally Posted by jonnyf90

Air Con condenser clutch?
My 1996 960 has a very audible "clunk" when the clutch engages

Cheers

Me thinks you mean the compressor clutch ?

cheshired5 · Jun 27th, 2018, 19:45

If the compressor clutch gap is the problem as it was for me, I fixed it with this simple and free solution.

T5R92011 · Jun 27th, 2018, 22:38

Also, if it's been over filled (ie pressure is too high) it will work for a bit and then stop.

green van man · Jun 28th, 2018, 06:51

Quote:

Originally Posted by T5R92011

Also, if it's been over filled (ie pressure is too high) it will work for a bit and then stop.

Which is why I take mine to the dealers where it is emptied then refilled with correct amount.
The DIY kits can work but it's hit and miss.

Paul.

Puffster · Jul 2nd, 2018, 22:26

Hmm...

Well thought I'd take a look yesterday, so opened the bonnet and looked down like in the video and could I see it? Could I heck. Eventually lay on floor and looked up and saw the compressor working away then cutting out. Put a feeler gauge in and I think it was just over .6 but I couldn't get another thin one in (said 63 on big and 10 on small but I've had them 20 years so could be anything).

Set off on my way back to London and sure enough it was pretty muggy, so I turned the a/c off, waited 30 secs and then back on and it worked fine all the way back.

But there is no way I could get anything in from the top, I'm sure it must have been a different engine? And again, from the bottom I don't think it would be possible due to the chassis being in the way.

Waynedance · Jul 4th, 2018, 00:20

Out of interest does the rad fan come on with the aircon?

Had a Mondeo at the garage today which had the air con not working all the time turned out to be the cooling fan module wiring had burnt out.

The vast minority · Jul 4th, 2018, 07:24

Quote:

Originally Posted by Waynedance

Out of interest does the rad fan come on with the aircon?

Had a Mondeo at the garage today which had the air con not working all the time turned out to be the cooling fan module wiring had burnt out.

Yes, the fan draws air across the AC condenser If you disconnect the rad fan so it wont start and then run the AC it wont work. Tried this myself recently out of curiosity when I put a new radiator in my P3

kev95 · May 30th, 2019, 07:43

Did you get it fixed? I have exactly same problem with my 2011 S60 D5

Jun 27th, 2018, 15:16	#1
Puffster Member Last Online: Yesterday 18:45 Join Date: Feb 2012 Location: Carmarthenshire	A/C Doesn't Work For Long When Hot So, get in the hot car, start her up, cold air starts coming out, drive off and then it slowly turns warm air Had her gassed as that's normally the sign and it was still cold to start with, 300m down the road and its warm again Outside temp was over 25C Next day drove 500 miles with an o/side temp of max 22C and it was cold as anything. Now I did try and start up outside my house and sit there for a wee while and sure enough, after about a minute I heard a "clunk" from somewhere and then the warm air started again. Anyone any ideas? __________________ Blue 2011 Volvo XC70 D5 AWD Police Spec - Current Grey 2005 Volvo XC70 D5 AWD SE - Gone after 230,000 miles

Jun 27th, 2018, 15:40	#2
jonnyf90 Grumpy git born too late! Last Online: Mar 20th, 2024 01:04 Join Date: Jul 2014 Location: Between Derby & Nottingham	Air Con condenser clutch? My 1996 960 has a very audible "clunk" when the clutch engages Cheers __________________ 1997 965 2.5 SE Manual 1996 944 Classic 2.3 LPT - SOLD/BROKEN/SCRAPPED 1997 S90 3.0 - SOLD to doingitsideways 2021 Škoda Octavia Estate L iV PHEV (Company)

Jun 27th, 2018, 19:45	#4
cheshired5 Premier Member Last Online: Dec 26th, 2021 13:42 Join Date: Dec 2013 Location: Crewe	If the compressor clutch gap is the problem as it was for me, I fixed it with this simple and free solution. __________________ 2002 S60 SE D5 Manual 209000 miles

Jun 27th, 2018, 22:38	#5
T5R92011 FCW Auto Service Last Online: Apr 22nd, 2024 19:40 Join Date: Feb 2015 Location: Gloucester	Also, if it's been over filled (ie pressure is too high) it will work for a bit and then stop. __________________ FCW Auto Service (Gloucester) https://www.fcw-autoservice.com

Jul 2nd, 2018, 22:26	#7
Puffster Member Last Online: Yesterday 18:45 Join Date: Feb 2012 Location: Carmarthenshire	Hmm... Well thought I'd take a look yesterday, so opened the bonnet and looked down like in the video and could I see it? Could I heck. Eventually lay on floor and looked up and saw the compressor working away then cutting out. Put a feeler gauge in and I think it was just over .6 but I couldn't get another thin one in (said 63 on big and 10 on small but I've had them 20 years so could be anything). Set off on my way back to London and sure enough it was pretty muggy, so I turned the a/c off, waited 30 secs and then back on and it worked fine all the way back. But there is no way I could get anything in from the top, I'm sure it must have been a different engine? And again, from the bottom I don't think it would be possible due to the chassis being in the way. __________________ Blue 2011 Volvo XC70 D5 AWD Police Spec - Current Grey 2005 Volvo XC70 D5 AWD SE - Gone after 230,000 miles

Jul 4th, 2018, 00:20	#8
Waynedance Senior Member Last Online: Mar 15th, 2021 22:31 Join Date: Jun 2017 Location: Nuneaton	Out of interest does the rad fan come on with the aircon? Had a Mondeo at the garage today which had the air con not working all the time turned out to be the cooling fan module wiring had burnt out. __________________ S80 P3 SE LUX D5 Auto

May 30th, 2019, 07:43	#10
kev95 New Member Last Online: Jul 10th, 2019 08:53 Join Date: May 2019 Location: Estonia	Did you get it fixed? I have exactly same problem with my 2011 S60 D5

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