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Model specific boards => Golf mk3 => Topic started by: gareth25 on 24 February 2010, 09:24

Title: air con
Post by: gareth25 on 24 February 2010, 09:24

morning haven,t been on here for a while using the golf as the main car now .noticed the air con switch light was flickering on when it was turned off,the car was running poorly like the air con was turning on and off revs going up and down :angry: when i turned the air con on car ran fine apart from higher revs. after a while i turned it off and it was all fine for 100miles and now its back the switch light is on all the time aircon is on all the time so high revs. ive unpluged the switch this makes no differance air con stays on.ive looked at taking the relay out but theres not one in there.it looks like the aircon is on all the time and all the switch does is turn it off. any ideas :huh:

Title: Re: air con
Post by: Wayne on 24 February 2010, 10:00

I would check to see if the clutch has failed on the compressor.

Title: Re: air con
Post by: gareth25 on 24 February 2010, 10:15

i didnit know there was a clutch and i don,t know where the aircon unit is as well theres no big flag on it :rolleyes: have looked in the haynes manual.it just says go to a main dealer with a aircon problem :cry:

Title: Re: air con
Post by: Wayne on 24 February 2010, 10:29

With the engine running have a look at the compressor and see if the center of the pulley is turning with the outer part if so then the clutch is engaged, that would suggest that the clutch has failed or the relay is stuck.

Also worth checking that with the switch off see if that makes any difference as it could be the light on the switch is faulty.

Title: Re: air con
Post by: Wayne on 24 February 2010, 10:30

Air con compressor is on the front of the engine and has 2 big (ish) pipes going to it.

Title: Re: air con
Post by: gareth25 on 24 February 2010, 10:45

found it :rolleyes: i thought that was it,it might as well have a big flag on it.ran the car pulley spins and the clutch. unplugged the aircon (connector on the aircon unit) and tried again clutch does not spin so thats good must be switch is faulty,left it unplugged.its still odd theres no relay plugged in and it still works :huh:

Title: Re: air con
Post by: Wayne on 24 February 2010, 11:13

Good result, pleased you have sorted it.

Title: Re: air con
Post by: gareth25 on 24 February 2010, 11:19

bought a switch off ebay £13 new part £35  :shocked: hope this sorts it. leaving it unplugged for now.dont think i need aircon at the moment :sad:.not sure what to do about missing relay main dealer says its not in the same position as haynes manual says. main dealers computer recons a lamber senser relay goes there,they say leave it blank for now,thanks for help wayne

Title: Re: air con
Post by: rubjonny on 24 February 2010, 13:48

not all mk3s have an a/c relay in the same spot, some have them above the fusebox iirc. fact it switches on without one in the fusebox suggests it doesnt need it ;)