Fiat Coupe Forum Fiat Coupe Forum
- Founded by Kayjey & James Northam - Funded by the Club for the benefit of all owners -
mixed RSS feedall RSS feeds
(this will scroll you to the RSS box)
Fiat Coupe Club UK
join the club
Fiat Coupe Forum
 
» Announced
    Old Forum BACK!
    Forum RSS feed!
    Images - finally!


» Related sites
    www.fiatcoupeclub.org
    www.fiatcoupe.net


» External data
    chatroom
    owners
 
Who's Online
4 registered (Moleman, santino, 2 invisible), 65 Guests and 1 Spider online.
Key: Admin, Global Mod, Mod
Forum Stats
2,702 Registered Members
67 Forums
109,366 Topics
1,300,250 Posts

Most users ever online: 546 @ 30/08/2007 19:16
Top Posters
stan 32098
barnacle 31955
Theresa 22789
bockers 21007
pinin_prestatyn 19894
PeteP 18762
JimO 17908
Nigel 16982
Jim_Clennell 16268
Vickster 15915
RSS Feeds
Club Events
Club Information
Track Events
Rolling Road/RWYB
Social Events
Non-UK Events
Coupé Related Chat
Coupé Spotting
Coupé News/Press
Buying/Selling Advice
Insuring a Coupé
Basic FAQ's
How to Guides
Forum Issues
Technical Problems
General Maintenance
Styling
Tuning
Handling
ICE and Alarm
Coupés for Sale
Coupés Wanted
Parts for Sale
Parts Wanted
Group Buys
Business Forum
Other Vehicles for Sale/Wanted
Other Items for Sale/Wanted
Haggling/Offers
Ebay links
Other Cars
Other Websites
General Chat
Topic Options
#1621413 - 05/06/2018 22:51 aircon clutch not working
G_Man Offline
Club member 1656
Enjoying the ride

Registered: 16/03/2006
Posts: 784
Loc: Warrington
I'm dumb about most things with cars but even dumber about matters aircon. So basically when I press the aircon button I can't hear the clutch engaging. I know aircon can be problematical with coupes but is there a known culprit or best to get it to a specialists? I borrowed a mate's pressure reader and connected it to the appropriate valve and there's no pressure whatsoever. Also am I right in thinking that the fuse / relay for the aircon is under the bonnet somewhere confused

Top
#1621417 - 05/06/2018 23:20 Re: aircon clutch not working [Re: G_Man]
GrahamL Offline
Forum is my job

Registered: 17/12/2005
Posts: 3582
Loc: Pothole City
If there's no pressure then the compressor won't engage to avoid damage. Condenser is most common part to leak so I'd start by replacing that (and the dryer/filter) then get a leak test and re-gas if OK.

Top
#1621419 - 05/06/2018 23:24 Re: aircon clutch not working [Re: G_Man]
DaveG Online   content
Club member 311
Forum is my life

Registered: 16/12/2005
Posts: 7053
Loc: Lightwater, Surrey, UK
If the clutch engages you will see the inner wheel on the compressor move with the outer wheel (the pulley). Usual cause is loss of refrigerant causing low pressure, and the low pressure switch signal means that A/C ECU won't let the compressor run.

IIRC early cars had the fuses and relays in the black box above the washer reservoir, on later cars the box was done away with (presumablt due to owner spilling washer fluid all over the black box) and the fuse/relays were scattered around the engine compartment (near the maxi fuses I think?)

You'll need to get a "vac and re-gas" (vacuum out all refrigerant first, test for leaks, then refill with refrigerant and compressor lubricant, plus usually a fluorescent green dye to make leak detection a little easier).

Any of the O rings can leak, the condenser at the front can split/leak, or any of the pipes can leak if anything keeps rubbing on them (even a P clamp that's supposed to stop them moving around) and the compressor can leak if the casing gets small cracks/splits. It can be a long journey to try and find the root cause of non-functioning A/C, of which there may be several, including a faulty A/C ECU or other electrical issues.
_________________________
1996 Portofino 20vt & 2000 Pearl White Plus
1985½ & 2016 2017 Fiat 124 Spider + XF Sportbrake

Top
#1621421 - 05/06/2018 23:29 Re: aircon clutch not working [Re: G_Man]
Edinburgh Offline
Club Board member
I AM a Coop

Registered: 04/03/2007
Posts: 10286
Loc: Auld Reekie
The pipework itself can throw up leaks especially near the bends.

My a/c guy is a wizard and has replaced the bottom pipe with a heavy duty hose which is a lot more flexible and less likely to corrode!

At Thirlestane it should have been working nicely but 3 days before a pinhole leak presented itself right in front of our eyes on top of the rad, rhs!

Being wet on the Friday he couldn't re-manufacture the length of pipe as planned, but later this week... smile

+1 though for condensor and drier....
_________________________


So there, Photobucket...

Top
#1621457 - 06/06/2018 15:37 Re: aircon clutch not working [Re: G_Man]
G_Man Offline
Club member 1656
Enjoying the ride

Registered: 16/03/2006
Posts: 784
Loc: Warrington
Thanks for your input peeps. At garage at the mo and about to a run a dye test. Hoping it's a pipe leak somewhere but I doubt it'll be as simple as that..

Top
#1621467 - 06/06/2018 18:00 Re: aircon clutch not working [Re: G_Man]
G_Man Offline
Club member 1656
Enjoying the ride

Registered: 16/03/2006
Posts: 784
Loc: Warrington
Well waddya know - hooked up the machine did all the vacuum stuff then against all expectations accepted the oil and the refrigerant and it's all sorted .. shocked Mechanic couldn't believe it either so after £50 and back slapping drove off nice n chilled. Of course there could be small leak somewhere but the dye will show this up. Note to self - need to be a bit less pessimistic about the car laugh


Edited by G_Man (06/06/2018 18:00)

Top
#1621468 - 06/06/2018 18:32 Re: aircon clutch not working [Re: G_Man]
Edinburgh Offline
Club Board member
I AM a Coop

Registered: 04/03/2007
Posts: 10286
Loc: Auld Reekie
Good result smile
_________________________


So there, Photobucket...

Top