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AC not working right

Tiny
DSPADE
  • MEMBER
  • 2006 AUDI A6
  • 4.2L
  • V8
  • 13,000 MILES
When I turn the ac it works but it only blows out hot air. And while in driving once I stop accelerating the car doesn't coast anymore. What I meant to say is my ac works but only blows hot air. There is also a kinda resistance when I stop accelerating. Instead of coasting, it slows down how can I fix these problems?
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Monday, June 15th, 2015 AT 2:08 PM

14 Replies

Tiny
RACEFAN966
  • MECHANIC
  • 5,029 POSTS
The ac cant work and blow hot air not how it works. So one thing at a time ac first. So does the clutch on the compressor click on and spin? The system might have too much pressure here is a guide to help us.

https://www.2carpros.com/articles/car-air-conditioner-not-working-or-is-weak

Please run down this guide and report back.
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Thursday, June 18th, 2015 AT 7:46 AM
Tiny
WHIGHTOWER
  • MEMBER
  • 0 POST
I had this problem and the compressor was locking up, had to get a new one cost me $278.00 all fixed.
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Thursday, September 12th, 2019 AT 5:20 PM
Tiny
175530
  • MEMBER
  • 2 POSTS
  • 2004 AUDI A6
  • 6 CYL
  • AWD
  • AUTOMATIC
  • 36,500 MILES
I had to have my Torque converter repaired, my air conditioner was working fine. The repair shop had to remove the converter for repair, mechanic says they had to disconnect battery. When I got my car back it drives great but now the air conditioner is blowing warm air. I return car to shop they checked all the air contioner components and said they could not find any problem, mechanic suggested it might be a computer issue, coolant level was fine pressure was fine what could it be
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Thursday, September 12th, 2019 AT 5:20 PM (Merged)
Tiny
2CARPRO JACK
  • MECHANIC
  • 11,533 POSTS
If they pulled the trans in that car, they had alot of parts off it.I would take it back and have them fix it. They will try to back out, but if you know the air worked before, let the manager know that and tell him they need to repair whatever they did.
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Thursday, September 12th, 2019 AT 5:20 PM (Merged)
Tiny
175530
  • MEMBER
  • 2 POSTS
I am aware that they are going to try to get out of it but do you have any idea what it could be so I can give them an idea what to look for or do I have to go to the dealer and try to get them to fix it. There a trans shop I dont know how they are with air conditioner
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Thursday, September 12th, 2019 AT 5:20 PM (Merged)
Tiny
2CARPRO JACK
  • MECHANIC
  • 11,533 POSTS
They may have left a connector unplugged for the pressure switch, this wont allow the compressor to engage.
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Thursday, September 12th, 2019 AT 5:20 PM (Merged)
Tiny
PBARON3
  • MEMBER
  • 1 POST
  • 2004 AUDI A6
  • V8
  • 4WD
  • AUTOMATIC
  • 54,000 MILES
After about 1 hour of use, the air con goes all wrong. Hot air starts to blow out of one or two vents instead of cool air. Tha garage ran a diagnostic but found nothing wrong and all they did was top up the a/c fluid. I suspect that the sensors are going wrong when they get too hot. Any advice?

Paul
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Thursday, September 12th, 2019 AT 5:21 PM (Merged)
Tiny
MHPAUTOS
  • MECHANIC
  • 31,938 POSTS
Hi there,

I would be checking that the A/C condenser fan is working correctly as if this is failing the system can over heat and shut down, start here.

Mark (mhpautos)
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Thursday, September 12th, 2019 AT 5:21 PM (Merged)
Tiny
DIXON
  • MEMBER
  • 2 POSTS
  • 2001 AUDI A6
Air Conditioning problem
2001 Audi A6 Manual

Hi all, I hope someone can help me with my air con problem on my audi a6 saloon 2001 1.9tdi.

Some times the ECON light come on automatic by itself when I am driving along and it will not go off.

The only way I manage to solve it is by switching off the ignition and turn it back on. Sometimes I have to try a few times before it goes off.

Do you think it could be I need to top up the coolant?
PLEASE HELP.
I have ask the dealer over the phone and not very helpful. All they told me is book it in and we will check it and the cost is well over the 100pounds plus mark.
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Thursday, September 12th, 2019 AT 5:21 PM (Merged)
Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
Hi Dixon,

The On Board Diagnostic (OBD) has sensed something wrong and you need a scanner to scan for the trouble codes.
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Thursday, September 12th, 2019 AT 5:21 PM (Merged)
Tiny
DIXON
  • MEMBER
  • 2 POSTS
Hi KHLow2008,

Many thanks for the reply.

Where can I get it scan? AUDI dealer or my local garage?

Will it cost me a lots of money to get it scan?
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Thursday, September 12th, 2019 AT 5:21 PM (Merged)
Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
Hi Dixon,

Try your local Autozone outlet, they do it FOC.
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Thursday, September 12th, 2019 AT 5:21 PM (Merged)
Tiny
DAVID805545
  • MEMBER
  • 1 POST
  • 2001 AUDI A6
Air Conditioning problem
2001 Audi A6 6 cyl All Wheel Drive Automatic

The air conditioning in the car works great when the car is moving, but as soon as I stop at a light or sit with car on the air slowly gets warm. What is causing it to do this and what do I need to fix?
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Thursday, September 12th, 2019 AT 5:21 PM (Merged)
Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
The compressor needs to be checked with a set of manifold gauges, it's either low on R-134a, or the condenser up in front of the radiator, needs to be cleaned, or the compressor itself is weak! The gauges will tell which!
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Thursday, September 12th, 2019 AT 5:21 PM (Merged)

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