Morepower
Member Since: 18 May 2012
Location: Somerset
Posts: 166
  
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Hi all
My 55 plate disco 3 air con has never worked since I bought the car, it’s fully gassed and holding the gas in but not blowing cold air out, and strangely seems to blow warmer if the econ light is out (compressor running) with the light on it’s colder but not cold enough 
How can I tell if the compressor is running, I can’t hear it start up? Is it fused separately and is it common for the fuse to blow?
Any thoughts from anyone gratefully received
Cheers
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 3rd Jun 2018 12:59 pm |
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lynalldiscovery
Member Since: 22 Dec 2009
Location: Maidstone
Posts: 7274
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Press auto and set temp to 16 and then with engine running lift the bonnet and after a minute or so the two bare alloy pipes near the battery box should get cold, one gets a lot colder than the other.
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| 3rd Jun 2018 1:28 pm |
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Morepower
Member Since: 18 May 2012
Location: Somerset
Posts: 166
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I’ll give that a try later, did I read somewhere that by pressing a series of buttons you could hard reset the climate control?
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| 3rd Jun 2018 3:46 pm |
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SteveNorman
Member Since: 14 Oct 2005
Location: Somerset
Posts: 1144
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Have a look at the front of the compressor and see if everything is rotating while the engine is running. They can seize and break the compressor drive off.
While running, the larger pipe on the passenger side should be fridge cold to the touch, the other warmish.
Regards
Steve
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| 3rd Jun 2018 4:12 pm |
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Morepower
Member Since: 18 May 2012
Location: Somerset
Posts: 166
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Is there a separate fire for the a/c? I can’t see one in the manual list?
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| 3rd Jun 2018 7:18 pm |
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Morepower
Member Since: 18 May 2012
Location: Somerset
Posts: 166
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Sorry ‘fuse’ bloody autocorrect 😱
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| 3rd Jun 2018 7:19 pm |
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yogi972
Member Since: 05 Jun 2011
Location: Kineton
Posts: 3372
 
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You’ve jinxed your car now 
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| 3rd Jun 2018 8:05 pm |
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Morepower
Member Since: 18 May 2012
Location: Somerset
Posts: 166
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| 3rd Jun 2018 8:20 pm |
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SteveNorman
Member Since: 14 Oct 2005
Location: Somerset
Posts: 1144
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The climate control ecu/switchpack controls the compressor, so if blower, flaps etc function then the compressor control is supplied with power, assuming it gets there. Check the front of the compressor & pipes, as suggested first.
regards
Steve
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| 4th Jun 2018 6:10 am |
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Lano
Member Since: 04 Jun 2018
Location: Liverpool
Posts: 17
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Hi people.
Had auto spark check feed to compresser
And was ok but no life in compresser.
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| 4th Jun 2018 3:10 pm |
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Morepower
Member Since: 18 May 2012
Location: Somerset
Posts: 166
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Just checked the pipes and both are the same temperature 😱
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| 4th Jun 2018 3:41 pm |
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Kilovolt
Member Since: 29 Jun 2015
Location: South Derbyshire
Posts: 1020
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The electric clutch may have failed in the compressor?
It is getting a voltage but not energising. You should hear a distinctive clunk (click) as the compressor kicks in on a switch on request.
It is possible to change the clutch although far from easy. YouTube is a good place to start.
Just a thought. "Track day running - Don't put your foot back on the accelerator until your absolutely sure you don't have to take it off again"
Current Ride: D4 XS Commercial Baltic Blue SDV6 fully loaded with heated everything 
Track Days: BMW E36 M3 Evolution MY 1996 (3.2 Litre 377 BHP sat in 1,250 Kgs of car, with a pro safety cage and some serious braking power)
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| 4th Jun 2018 3:50 pm |
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Lano
Member Since: 04 Jun 2018
Location: Liverpool
Posts: 17
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So it would be much easier to change the hole thing
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| 4th Jun 2018 3:54 pm |
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Kilovolt
Member Since: 29 Jun 2015
Location: South Derbyshire
Posts: 1020
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Excepting the clutch change is a very much cheaper than replacing the whole compressor. It is possible if you do not have a budget for the whole compressor 
https://www.disco4.com/forum/air-condition...60849.html
 "Track day running - Don't put your foot back on the accelerator until your absolutely sure you don't have to take it off again"
Current Ride: D4 XS Commercial Baltic Blue SDV6 fully loaded with heated everything
Track Days: BMW E36 M3 Evolution MY 1996 (3.2 Litre 377 BHP sat in 1,250 Kgs of car, with a pro safety cage and some serious braking power)
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| 4th Jun 2018 3:57 pm |
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Lano
Member Since: 04 Jun 2018
Location: Liverpool
Posts: 17
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Can't afford New one May stretch for recon
But i have seen them on eBay between 55 -100 quid with only 30 day garauntee.
Might take a chance.
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| 4th Jun 2018 4:04 pm |
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