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Discussion Starter #1
Possibly a stupid question this...

Is there any sound way of checking whether or not an aircon unit is functioning correctly?

Reason I ask this is because I'm not entirely sure if mine is doing anything more than saying "A/C" on the display. Having not owned a car with aircon before, Im not entirely sure what the obvious signs of failure are...

Adjusting the temperature using the down/up buttons seems to make the air colder/hotter respectively, but it doesn't seem at all different to what I had in the Astra. When I've gone out to drive to work and the windscreen has been misted over, I've pressed the button marked with the windshield icon, the fans come on at full power, the display says "A/C", the temperature says "32" and.... it takes a long time to demist.

I was under the impression that as soon as I turned the engine on, with A/C running, that the air would be as hot/cold as the display claims, not however hot the engine happens to be at the time (ie. cold).

Any suggestions for quick and easy foolproof tests?
 

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It could be loss of gas (I had a problem last year) to fill the gas costs about £70-80 most garages can sort it for you. As it turned out I needed a compressor but that only cost £400-450 ish including fitting & gas.

The costs are from memory couldn't find the bill. I don't know how you do it yourself.

Weston
 

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Discussion Starter #3
Thanks, that kinda helped - but didn't fully answer my original question :)

Assuming you switched your engine on from a cold start, put aircon on, would you expect the temperature to be as hot or cold as the temperature readout suggests pretty much instantly? Ideally if there was any foolproof way of determining whether it is faulty before I shell out £100+ just for someone to have a look at it - then that would be ideal :)
 

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The heat setting will only be as hot as the engine coolant. As regards demisting you need to make sure that the re-circulating button is not lit. Best test is to let the car get to normal operating temperature, adjust the thermostat to 32 deg on auto wait till the fan speed decreases as indicated on the control panel to one or two speed. Then drop the temperature to 18 deg the fan should increase back to full speed and very cold air should come from the vents.
if the air coming from the vents are not very cold you probably need to have the system re-gassed it is not a diy job as you need specialist equipment to re-pressurise the system.
hope this helps.
 

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Why not speak to Guy and go and meet him somewhere.
If it is not working the way it used to Guy would know.
 

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Air con

Hi chaps....mine does not work. I gave the local expert a ring and he came round and tested it. He filled the unit with a special gas and pressurised it. He then tested it with a probe which indicates where the leak is. The rad thing had a hole in it so is leaking and I need a new one. £600! Don't think that I will bother. Happy airconning:D
 

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Hi there,

If you want it tested I have all the gear at work to re-gas the system and check for leaks etc. I`m in guildford which is a bit of a distance but I can do it cheaper than most specialists.

Seeya

Richard
 

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Discussion Starter #9
On further inspection it seems to be fine - I went for a drive last night and gave it plenty of time to warm up (the car that is), left everything on AUTO at 32 degrees, waited until it was hot inside the car and then quickly turned the temperature down to 18 (it's lowest setting I believe). The air got very cold very quickly :D

So I guess it is working fine - just my inexperience with how aircon works I guess.

Richard - thanks for the kind offer, if I ever have any trouble with it nearer the summer (I dont really use it at all at the moment) I'll give you a shout. :)

Thanks for all the help.
 

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recirculation

Hi chaps,

if you set the airflow to recirculate without the A/C on it will mist the car up but if you use A/C and recirc it will clear the screen more quickly as after a few passes the aircon has less moisture to shift out of the recirculating air than it does the atmospheric air.

The only time this doesn't happen is if you had something really damp in the car like a wet dog and then your A/C will be drying out the hound and the air inside the car will be more humid than the air outside.(we don' let wet dogs into GTR's as a rule so that shouldn't be a problem)

so really with the recirc on and AC the problem should be less, this is contrary to a few posts but I had to point it out as they are not quite correct.;)

Cheers
Steve
 
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