Air conditioning not blowing cold air

[leelad00]

Good morning,

I have had an issue with my A3's air conditioning for about a year now.. i've just never needed to really get it sorted because.. well it's England, how often do you use Aircon haha.

The Audi A3 I have is the SE TDI 1.6l 2013 model.

Basically, it was working fine - air blowers normal and then the air flow turned ice cold when I turned A/C on. On a road trip to Newcastle last April I turned the A/C on and.. nothing. The blowers were fine but everytime I pressed the A/C button, the red LED came on as I pressed down on the button but the second I took my finger off the red LED went off.

So, I thought I would take it to Halfords for a quick regas.. they regassed it and kept the thermometer in the vents to check the temp. It filled it and in doing so it meant that the red LED stayed lit after I had taken my finger off which lead me to think that it had simply ran out of "gas" in the A/C. But, it still wasn't going cold.

Fast forward a year and I am still in the same predicament - Red light comes on and stays on but the blowers don't change air temperature at all.. not fun in this recent hot spell that we have had. And with two roadtrips coming up (one from Manchester to Newquay in August) I am looking ahead to trying to get this sorted in advance.

Had a quick check around the car last night - now I must admit I am a complete novice when it comes to anything mechanical like this but I am pretty good at learning stuff and being able to fix simple things myself - I know where the fuses are and all that sort of stuff so I am not completely useless but definitely no expert.

I identified what I am pretty certain is the compressor in the engine, driven by a belt at the front left of the engine. This belt is constantly running when the engine is on - not sure if that should be the case (i'd presume it should only be on when the A/C button is on?) but there is definitely a high pitched whirring sound added to the engine noise when the A/C button is pressed and i am 99% certain it is coming from what I think is the compressor so... in my eyes I am pretty sure the compressor is working as it should.

My original diagnosis is that there could be a leak where the "gas" (sorry I don't know the name for it atm) in the A/C is just completely leaking out when filled. This is backed up by the fact that I think the compressor works as it should when it is pressed and having it refilled enabled the red LED light to stay toggled on when pressed as opposed to going straight out when you take your finger off the button.

Audi want £60 just to look at the car and that's before they quote me a ridiculous price to change something that's probably quite rudimental. Any ideas? I looked at the fuses last night but I couldn't get the aircon one out (need some needle nose pliers) but with it sounding like the compressor is activating when the button is pressed I can't see it being an issue with the fuse or else nothing would happen, would it?

Any help would be greatly appreciated!

Lee

[Magnet]

Hello Lee,

Not been able to read all of your post - in a rush at the momen. As I see it , red light on = air con. off. Might be worth consulting the handbook.

Kind regards,

Gareth.

[leelad00]

Hey, thanks for the reply.

The air con worked as usual for about the first 4 months of having the car at which time red light on = air con on.

Handbook confirms this: "The LED in the button will go out when the air conditioner is switched off".

thanks,

Lee

[Magnet]

OK sorry Lee,

Obviously your later A3 behaves differently to the previous model where red light on = ECO on ( AC off).

Kind regards,

Gareth.

[leelad00]

Ah yeah, not mine sorry. Anyone else any other ideas? :(

[Jay1]

Hi mate wondering if you got this sorted having the exact same problem 

[Demixl]

I had a similar problem. I gues filling gas will solve your problem. I really got confused than my ac did not blow cold. I have phoned to my friend, which know cars well. He just said me to go to the good air conditioner service and to fill the gas. I went to guys from https://www.socool.sg/. They filled the gas and my aircindioner started to blow cold again.