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Discussion Starter · #1 ·
Took my TiD into Kwik-Fit this afternoon for an Aircon check & recharge. They've recharged the system and have checked the system for leaks etc which they reckon is OK, but there's still no cool air. The fitter says it's "not engaging".

The good news is they haven't charged me because of their guarantee to improve the A/C or no charge (the more unscrupulous here may be able to ake advantage of this :grin: )

Any Ideas where I should look next?

If it's going to involve any significant expense /expertise I'll not bother - just open the windows instead :D , but if there's anything I can simply check myself to diagnose it'd be worth doing.

Have done a recalibrate on the ACC and it shows no errors, checked fuses etc...
 

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Discussion Starter · #3 ·
Bingo!

Thanks, Squold - one of the wires to the control solenoid was severed about an inch from the connector to the ACC pump. 5 minutes with a snap-block connector & a pair of pliers and it's all fixed

Result! (I love this place!)

As it's probably quite some considerable time since the pump's been running - anything I should check / look out for?
There's no nasty noises, and the air's blowing cool though I can see white 'foam' in the sightglass when the A/C's running. The Expansion tank in front of the Rad gets quite hot but I guess that's expected...

again - many thanks - saved me a bob or two no doubt!
 

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Discussion Starter · #4 ·
OK, Now I'm really confused ... !

As per my last post - fixed the broken cable last night and all working fine. Lots of cool, cool air (to quote Reeves & Mortimer) and as I select and deselcted 'Econ' I could hear the clutch kicking in and observed the A/C pump pulley engaging and disengaging. Great ! - All fixed ...

or so I thought. :confused:

So Glorious, sunny Sundays in North Wales don't happen that often so we headed off to the beach, expecting the journey to be in perfect air-conditioned comfort - not so.

I assumed it must be some problem with my cable repair, but I've checked it all out tonight and my cable repair is fine. Checked the terminals with a multimeter though, and I'm not getting a sausage sent to the A/C pump solenoid.

I've rechecked all the fuses (both in the under-bonnet and interier fuse boxes) and they're all fine. Recalibrated the ACC and still showing no errors. I've even tried jamming the cluth with a couple of matchsticks to force the pulley to turn, but it's still not operating the A/C.

I've also noticed that whereas in the past I can hear the engine load changing as you engage and disengage 'Econ' (even while the A/C was not working), but now there's no difference at all.

It's almost as if the ACC is electing not to engage the A/C for some reason (Outside temp reading 29 degrees this afternoon!!)

I've checked everything I can think of now and am at my wits' end! (I've even managed to bugger up my ACC display trying to find out if there were any fuses in the ACC control unit - there aren't) AAARGH!!

Anyone got any Ideas at all ??

Coincidentally my fuel gauge has been playing up today too, alternating between full (it is full), empty (including showing the fuel light) and halfway between.

Could this be linked in any way.

Eternally greatful for any light that can be shed.

Off to search E-bay now for another ACC controller .... :mad:
 

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Search ebay for the man that can repair your ACC unit. Can't remember the exact name. One is SID.... Another is "delboy". About £50 with a guarantee. Several people on here have used them.

Your ACC was filled a week or so ago. If you have a leak, it could have lost all the refrigerant already. Seals shrink and leak if the Aircon is not used regularly all winter and summer.
 

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Some things to things to check -

1) Is the check engine light on - AC is often disabled in this mode.

2) AC relay in under bonnet Fuse/relay block - is it getting ground on pin 5 (signal to switch on from the electronics)
Pin 1 - +12V always on
Pin 2 - pin 1 switched to supply AC compressor clutch
Pin 4 - +12V on when engine running
Pin 5 - short to 0V to operate.

3) is the pressure OK in the AC system? - must be 29-392 psi - pressure switch on right side of condenser - unfortunatly I can't find out how this is tested - back to Kwik-Fit to check this!


Antony.
 

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Discussion Starter · #7 ·
Thanks Guys - checked out the relay - that's working fine - when I short out pins 1 and 2 the clutch operates as expected, but pin 5 never goes to ground.

Next job was to try and locate the pressure sensor - it was then I noticed the fault - looks like the bottom A/C pipe running underneath the Rad has been kerbed and has fractured. :(

depressing the schreader valves on the recharge points confirmed (with a very long stick I hasten to add!) - nothing there.

I'm Suprised the recharge lasted long enough for the A/C to work at all!

Thanks for all your assistance - I don't think I'm going to pursue this any further - looks like a bit of a faff to replace the pipe - and who knows what else will be wrong with the system if I fix that - I guess it's been non-operiational for quite some time (I've had the car 8 months and it's never worked in my ownership - but I wasn't too fussed in the winter - I was more concerned with getting the pre-heater working!) the seals have probably gone too.

Never mind - just have to hope the leccy windows don't pack up :wink:

Next job is to try and repair the ACC display - don't hold out much hope, but it's worth a try - I'm thinking along the lines of sandwiching the ribbon connector under a clamping bar screwed through the PCB - what a daft idea to glue them in pace in the first place! - what's wrong with ZIF sockets?
 

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I'd be tempted to drop a line to Ian at m5saabcentre email: [email protected] phone:07910931357 to see if he has the pipes.

He breaks Saabs for a living and is very reasonable - I know he's breaking a 9-3 at the moment.

As to the ACC - there is a someone on ebay who specialises in repairing the display for £50 - search for "saab acc"


Regards

Antony
 
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