2005 Audi A6 Logo
Anthony Palmer
Anthony Palmer Posted on Sep 02, 2013
Answered

I do not get any cold air from AC vents. I believe that I overcharged the system by adding from a can that had a faulty pressure guage. The AC was working even after I had overcharged it. After about 4 days of driving (6 hours - 250 miles) in moderate weather, the AC stopped blowing cold air. I checked the pressure again, and it showed overcharged (about 100 psig). I bled off enough refrigerant to get the pressure back to 40psig, but still no cold air. Did an overcharge pressure saftey valve blow ? Did I blow the compressor? I did not hear/notice anything abnormal. Any suggetsions? Do I need to have the computer codes reset?

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1 Answer

A

Anonymous

You need to have a repair shop fix the problems
you put in there, from trying to work on an
A/C system without proper knowledge or equipment

5 Related Answers

Anonymous

  • 45 Answers
  • Posted on Nov 13, 2008

SOURCE: 1997 audi A4 heater blowing cold air

You will have to change the heater core. 9 out of 10 times, when the heater is not heating the air, it is a bad heater core.

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Anonymous

  • 5158 Answers
  • Posted on Feb 05, 2009

SOURCE: 1996 Audi A4 Air Conditioning Causes Fuse/FuseBox To Melt

facia one fuse 25
facia two relay 16
facia three fuse 5, relay 2, relay 3

all three of the above panels are located on the drivers side (which in the diagram i have is righthand drive).

Those are pretty much all the fuses and relays that control your a/c. the clicking noise you hear is probably one of the three relays i've listed. now i don't know alot about audi's except i'll never own one. but i have a lot of information if you have other questions.

that flickering you noticed could be one of the relays failing or you have a short somewhere in the wiring.

anything else you need feel free to ask

Robert

Please take a moment to rate this solution .. thanks

Incidentally the only reason that i can think of that those parts would melt is that the current is high on those wires. are there any recalls that you are aware of ?

Anonymous

  • 4 Answers
  • Posted on Mar 15, 2009

SOURCE: How can I charge the AC system is possible to install a low pressure valve?

THERE SHOULD BE A HIGH PRESSURE PORT LOCATED IN FRONT OF THE RADIATOR..WITH A RED CAP ON IT...THATS THE ONLY PLACE YOU CAN CHARGE THE A/C..THAT WHAT A DEALER MECH TOLD ME.......YOU MIGHT HAVE TO FIND A ADAPTER FOR THE FITTING......IF YOU FIND ONE LET ME KNOW......

Anonymous

  • 32 Answers
  • Posted on Jan 07, 2010

SOURCE: My audi a4 is blowing out cold air even when the

heater core clogged or heater valve

airjer995

Jeremy W.

  • 5332 Answers
  • Posted on Oct 06, 2010

SOURCE: 2001 Audi A4 heater blows

The EVAP core (the part that cools the air) is similar to a dehumidifier. As the outside air passes through the EVAP core it removes the moisture from the air. The moisture collects on the EVAP core and eventually drains out of the EVAP drain which is usually under the passenger side of the car. This is normal any time the a/c is on.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

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When adding freon to our AC unit in our 2002 Chrysler Concorde we believe it was over filled which caused it to stop blowing cold air.I believe there should have been a lubricant added along with it but my...
some cars I've worked on, if you overcharge the system, the compressor will shut off automatically if the pressure is too high by means of two or more pressure switches. Theoretically you won't damage anything because the system just won't run for more than a few seconds before shutting off again. You won't get any cooling of course if this happens.
I just used a small screwdriver the open the schrader valve (like how you'd let air out of a tire) until it was back at the correct pressure. EPA won't like you.
Don't add let some out watch and listen for the compressor clutch to engage and stay on. Not cycle on off on off...
If there is a leak or block in the system this won't work.
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Jan 16, 2018 • Chrysler Concorde Cars & Trucks
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Where do you add refrigerent
Refrigerant is part of the A/C system. You should have special guages to add it to the system to prevent overcharging. There are do it yourself cans available at many stores but it is highly recommended that it be done professionally. If your system needs refrigerant added to it then there is a leak somewhere in the system.
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Oct 23, 2011 • 1996 Chevrolet Caprice Classic
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How many pounds of r134 and how much oil ozs.
somewhere around 1.6 pounds (1lb.14ounces) of R134a if system is evacuated and 3 ounces of oil with new compressor.
keep pressure on the low side around 34-37psi & it should blow snow. Below are normal car AC pressure readings with 134A.
  • Normal readings on high and low side with AC OFF (static pressure) – Depends on outside temperature, but normally is between 80-105 PSI
  • Normal low side reading with AC on high speed and MAX & engine at 800-1000 RPM’s – Ranges from 25-35 PSI –
  • Normal high side reading ranges from 200-350 PSI
Don’t assume that if adding little Freon is good that adding a lot is better! Overcharging just a little can decrease the performance of the system and possibly damage the compressor.
DIY recharge kit:
With the AC on the coldest setting, use a thermometer in a middle vent. Normal vent temperature readings will vary depending on the (ambient) outside temp. The vent temperature should range from around 42-55 degrees in my experience. If normal gauge readings are obtained and the vent air is cold – STOP don’t overcharge the system.
Thank you for using fixya and be safe.
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Jul 19, 2010 • 1994 Chevrolet S-10 Blazer
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A/c recharge what is thew psi for refrigerant
Below are normal car AC pressure readings with 134A.

Normal readings on high and low side with AC OFF (static pressure) – Depends on outside temperature, but normally is between 80-105 PSI

Normal low side reading with AC on high speed and MAX & engine at 800-1000 RPM’s – Ranges from 25-35 PSI

Normal high side reading ranges from 200-350 PSI
Don’t assume that if adding little Freon is good that adding a lot is better! Overcharging just a little can decrease the performance of the system and possibly damage the compressor.

With the AC on the coldest setting, use a thermometer in a middle vent. Normal vent temperature readings will vary depending on the (ambient) outside temp. The vent temperature should range from around 42-55 degrees in my experience.

If normal gauge readings are obtained and the vent air is cold – STOP don’t overcharge the system. The only proper way to remove refrigerant is with a AC recovery machine so if this is being done at home I can’t emphasize enough not to over charge the system.

Thank you for using fixya and be safe.
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Jun 17, 2010 • 2002 Ford Expedition
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Air conditioner compressor runs - freon is up to proper level....not cooling??
BOTH High and low readings should be checked to have a better idea of what is going on with an AC system but based on the limited information… the compressor is not engaged or is not pumping. Below are some things I would check;

 1. Check the high and low gauge readings with the AC on & set on MAX/Recirculate, middle vents with the engine at 2,000 RPM’s, blower speed on high.

 2. Check the vent temperatures with a thermometer from the middle vents, far right & far left vents?

 3. What is the outside temperature at the time the readings were taken?
4. Check to see if the condenser fan blowing strong?

 5. Notice if compressor clutch is cylcling excessively.
Could be overcharged, not enough air going across condenser fins, compressor not pumping sufficiently… BOTH gauge readings are really needed to get a better idea.
Below are normal car AC pressure readings with 134A.

Normal readings on high and low side with AC OFF (static pressure) – Depends on outside temperature, but normally is between 80-105 PSI

Normal low side reading with AC on high speed and MAX & engine at 800-1000 RPM’s – Ranges from 25-35 PSI

Normal high side reading ranges from 200-350 PSI

Don’t assume that if adding little Freon is good that adding a lot is better! Overcharging just a little can decrease the performance of the system and possibly damage the compressor

Thank you for using fixya and good luck, keep me posted. Be glad to help you get your A/C running again soon.
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Jun 12, 2010 • 1999 Chevrolet Silverado 1500
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1answer

I have full gas in my car but still no cold air inside the car
If you over charged the system your a/c will not work. To diagnose problems, an A/C manifold gauge set is needed to read high and low side pressure readings. Avoid adding refrigerant with a simple charging kit like the ones sold at parts stores. Don’t add any stop leak, this can cause problems in the compressor, expansion valve or condenser.
Keep in mind that using an A/C gauge set and seeing BOTH high and low side readings can help in diagnosing the problem when you know what to look for. First, on a 134A system the high and low side service ports are different sizes. AC gauge sets have color coded hoses, the blue color coded hose has a connection that fits on the low side service port and the red hose has a connection that will only fit onto the high side. The yellow hose won’t hook up to anything if just checking the readings; it can be used to connect to a vacuum pump or attached to a refrigerant can or tank.

Normal readings on high and low side with AC OFF (static pressure) - Depends on outside temperature, but normally is between 80-105PSI  Normal low side reading with AC on high speed and MAX & engine at 800-1000 RPM’s - Ranges from 25-35 PSI - Note that on many Chrysler products a normal reading on the low side may be 15-25PSI  Normal high side reading ranges from 200-350 PSI
Don’t assume that if adding little Freon is good that adding a lot is better!  Overcharging just a little can decrease the performance of the system and possibly damage the compressor.

With the AC on the coldest setting, use a thermometer in a middle vent. Normal vent temperature readings will vary depending on the (ambient) outside temp. The vent temperature should range from around 42-55 degrees in my experience. If normal gauge readings are obtained and the vent air is cold - STOP don’t overcharge the system. The only proper way to remove refrigerant is with a AC recovery machine so if this is being done at home I can’t emphasize enough not to over charge the system. And actually the best way to insure the proper charge is in a system, is to use an AC machine to recover the freon and then evacuate and recharge the system with the correct amount. Most cars have the specified amount on a decal under the hood. 

Both low and high side readings are lower than normal, this indicates a cars AC system is low on refrigerant and is under-charged.

If both low and high side readings are too high, this indicates an overcharged system - too much refrigerant. This also can indicate that the condenser fan is not working, is too slow or the car is overheating and heat is transferring from the radiator to the condenser.

Good luck and hope this helps, keep me posted be glad to answer any question you may have. 


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Jul 02, 2009 • 1998 Honda Prelude
4helpful
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The a/c on my 2006 honda pilot is not owrking and appears to have a low refrigerant charge. I want to recharge it and find the leak with die. what is the amount of 134a to be fully charged
Adding freon or topping off a cars A/C system is the most common task performed to restore performance and get cold air blowing again. However, adding refrigerant isn’t always the solution for car air conditioning problems. There can be many other things wrong besides a system being low on refrigerant. To diagnose problems, an A/C manifold gauge set is needed to read high and low side pressure readings. Avoid adding refrigerant with a simple charging kit like the ones sold at parts stores. Don’t add any stop leak, this can cause problems in the compressor, expansion valve or condenser.
Keep in mind that using an A/C gauge set and seeing BOTH high and low side readings can help in diagnosing the problem when you know what to look for. First, on a 134A system the high and low side service ports are different sizes. AC gauge sets have color coded hoses, the blue color coded hose has a connection that fits on the low side service port and the red hose has a connection that will only fit onto the high side. The yellow hose won’t hook up to anything if just checking the readings; it can be used to connect to a vacuum pump or attached to a refrigerant can or tank.
*Make sure the condenser fan comes on when the readings are being checked.
Normal readings on high and low side with AC OFF (static pressure) - Depends on outside temperature, but normally is between 80-105 PSI
 Normal low side reading with AC on high speed and MAX & engine at 800-1000 RPM’s - Ranges from 25-35 PSI - Note that on many Chrysler products a normal reading on the low side may be 15-25 PSI
 Normal high side reading ranges from 200-350 PSI
Don’t assume that if adding little Freon is good that adding a lot is better!  Overcharging just a little can decrease the performance of the system and possibly damage the compressor.
With the AC on the coldest setting, use a thermometer in a middle vent. Normal vent temperature readings will vary depending on the (ambient) outside temp. The vent temperature should range from around 42-55 degrees in my experience. If normal gauge readings are obtained and the vent air is cold - STOP don’t overcharge the system. The only proper way to remove refrigerant is with a AC recovery machine so if this is being done at home I can’t emphasize enough not to over charge the system. And actually the best way to insure the proper charge is in a system, is to use an AC machine to recover the R143a and then evacuate and recharge the system with the correct amount. Most cars have the specified amount on a decal under the hood. 
Hope this helps. Keep me posted, be glad to help get you cooled again. 
Read full answer
Jul 01, 2009 • 2004 Honda Pilot
0helpful
1answer

Ac compressor took one can of freon will not take other also it still is not cool
You may have over charged the system, An over charged system will also give you poor A/C performance and worst can lead to expensive repair if the compressor get's damaged.
 With the AC on the coldest setting, use a thermometer in a middle vent. Normal vent temperature readings will vary depending on the (ambient) outside temp. The vent temperature should range from around 42-55 degrees in my experience. If normal gauge readings are obtained and the vent air is cold - STOP don’t overcharge the system. The only proper way to remove refrigerant is with a AC recovery machine so if this is being done at home I can’t emphasize enough not to over charge the system. And actually the best way to insure the proper charge is in a system, is to use an AC machine to recover the freon and then evacuate and recharge the system with the correct amount. Most cars have the specified amount on a decal under the hood. 
Normal readings on high and low side with AC OFF (static pressure) - Depends on outside temperature, but normally is between 80-105 PSI
 Normal low side reading with AC on high speed and MAX & engine at 800-1000 RPM’s - Ranges from 25-35 PSI - Note that on many Chrysler products a normal reading on the low side may be 15-25 PSI
 Normal high side reading ranges from 200-350 PSI
Don’t assume that if adding little Freon is good that adding a lot is better!  Overcharging just a little can decrease the performance of the system and possibly damage the compressor.
God luck and hope this helps. 
Read full answer
Jun 30, 2009 • 1994 Ford Escort
1helpful
2answers

97 Olds Aurora AC blowing warm air a day after recharging system
Several- The system should hold freon for years without leaking. There are pressure switches and they cut off the compressor with an undercharge and an overcharge. You need guages to measure the charge. There are testers the A/C shops have called "sniffers" which can detect a leak. If you have no leak then you need a technician to add or remove freon to get the concentration right. Or you need guages.
Read full answer
Jun 12, 2009 • 1997 Oldsmobile Aurora
0helpful
2answers

After approx 40 min of highway driving the AC stops blowing cold
The frosting of the line is normal. Did you use a gauge set when charging the unit? AND, most important, Did you evacuate the system before putting in the freon? Very important.What was your final low side reading and your final high side reading?
Read full answer
Jun 02, 2009 • 2003 Hyundai Santa Fe
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When adding freon to our AC unit in our 2002 Chrysler Concorde we believe it was over filled which caused it to stop blowing cold air.I believe there should have been a lubricant added along with it but my...

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