GolfGTIforum.co.uk
Model specific boards => Golf mk4 => Topic started by: djshort_stuff on 06 July 2010, 10:45
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I have a problem with my air con which i think is due to the compressor, because it isnt engaging when i turn the ac on, i have put a gague on the low port and it reads high infact it says warning, what i would like to know if anyone could help is could there be a problem with the air con pressure sensor if so where abouts is the sensor and how would i go about bypasing it to then see if that gets the copressor running?
Is there anything else i can check ive checked fuses all ok also the wiring on the compressor seems fine just want to make sure ive looked at everything before having to shell out for a new 1.
Also might sound like a silly question but if it is the compressor is that a job for a professional will the system need to be discharged then re-charged again?
Thanks
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Anything air con wise to be honest is beyond diy repair.
I would get a specialist to carry out a full system test which will help find the problem.
The system will need to be discharged to replace the compressor.
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Thanks for your help i have taken the car to air con specialist yesterday they said that the compressor is not getting a feed i have checked all wires and fuses, has anyone else got any ideas why the compressor might not be getting a feed,
cheers :grin:
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Check Fuse 5 in the fuseboard on the side of the dashboard
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Thanks Rhyso yeah i have checked fuse 5, the car kind of pulses, revs pick up for one second then drop off again for about 3 seconds if i unplug fuse 5 it stops doing this then plug it back in it starts again, im guessing this means the fuse is ok should i change it anyway? thanks again
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The way I double checked was open the bonnet and look at the fans immediately behind the slam panel
Switch the fans and AC on and if the fans are turning then the fuse is fine :smiley:
But it does sounds like its fine
You could have a faulty pressure switch :undecided:
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Yeah both fans are running fine, i have heard about faulty pressure switches ive been trolling through post after post trying to find a solution, where abouts is the pressure switch and what does it look like im not really sure what i would be looking for? Also read about you can bypass it to see if it is faulty how would i do that
Thanks
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Yeah both fans are running fine, i have heard about faulty pressure switches ive been trolling through post after post trying to find a solution, where abouts is the pressure switch and what does it look like im not really sure what i would be looking for? Also read about you can bypass it to see if it is faulty how would i do that
Thanks
Its located on the bulkhead - have a look at Wazzzer's project thread as there are one or two pictures of its location :smiley:
When was the last time the system was re-gassed?
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Yeah both fans are running fine, i have heard about faulty pressure switches ive been trolling through post after post trying to find a solution, where abouts is the pressure switch and what does it look like im not really sure what i would be looking for? Also read about you can bypass it to see if it is faulty how would i do that
Thanks
Pull the plug and bridge the wires, I believe to change the switch you will need the system depressured.
I take it the system is fully gassed
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The system was regassed about a year ago but the car was sitting for about 6months while i was away, they didnt say anything about low pressure at the ac place yesterday i have also put a gague on it which read about 90 which is high? Thanks alot for your time and replys gents :smiley:
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Here's a thread with some pics and info
http://uk-mkivs.net/forums/t/354145.aspx
:smiley:
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thanks alot Rhyso i found the sensor im now trying to bridge the sensor can you talk me through it please, never done it before. I have unplugged the clip do i bridge that part, theres 3 bits inside do i make sure i have all three bridged?
sorry your prolly getting fed up with my silly questions lol
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thanks alot Rhyso i found the sensor im now trying to bridge the sensor can you talk me through it please, never done it before. I have unplugged the clip do i bridge that part, theres 3 bits inside do i make sure i have all three bridged?
sorry your prolly getting fed up with my silly questions lol
I can't as I've never replaced it so can't help any further I'm afraid :sad: Not an electrician either so I can't advise on how to bridge the switch.
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you don't need to re pressurise the system to change the switch, there's a valve under it that stops fluid escaping when you remove it. Mine was knackered due to it actually leaking fluid through the body of the thing
The switch shows up on VAG COM if its faulty too
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you don't need to re pressurise the system to change the switch, there's a valve under it that stops fluid escaping when you remove it. Mine was knackered due to it actually leaking fluid through the body of the thing
The switch shows up on VAG COM if its faulty too
And if the valve sticks you get a face full of gas, not a good idea before doing anywork the system should be drained of gas.
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not unless you've got your face next to it you plum :grin:
It's not any worse than doing an oil change, old oil is carcinogenic...
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not unless you've got your face next to it you plum :grin:
It's not any worse than doing an oil change, old oil is carcinogenic...
If you think it is safe thats fine, I work with air con everyday so tend to be very carefull.
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Hello gents my a/c problem has now been resolved :smiley: took it back to a/c specialist they said there are two faults one compressor is faulty also it wasnt getting an electrical feed, so they have fitted a new compressor, after fitting it the electrical problem sorted itself out fingers crossed it doesnt come back, but typical weather is rubbish now! Also had a cambelt change and water pump so just got a few other common faults to sort and car will be sweet, thanks for all your info. :grin: