My AC is pooping out... not pushing too much cold air.
Not too familiar with recharging the AC system.
Can you DIY?
If not is it an Audi dealer only deal or can I bring it to "anyone".

Thanks.

Jim

I believe that your system uses R134a.
Double check the label next to the low pressure
service port.

The service port is located on the passenger side under the tray (cover) that protects the climate control components and fuse box under the hood.

if it uses r134a then you can buy a can of freon
for about $5 bucks at most discount auto shops,
you'll also need the hose that connects from the can to your service port.

The Low pressure cut off switch is attached to the service port. Remove this and short ciruit the connection before attempting to charge the system.

Then engine must be running with the AC on when you charge it.

I believe the capacity is 32oz but DOUBLE CHECK this. Too much freon could cause the compressor to blow!

If the system is R12 (which mine was) you'll need a retrofit kit ($45) which contains the PAG oil and enough freon to fully charge your system.

Use the included adapter over the existing threaded R12 low pressure service port. Connect the adapter hose, short circuit the low pressure switch and you are all set.

Don't forget to replace the low pressure switch
(DO NOT leave it shorted) as this protects the compressor from damage.

Good luck

Sam. 92 100cs

where do you get such retrofit kits?
im looking to fix my AC on my 91 100 too

I have the R12 so I will get the conversion kit.

My recirculation button when pressed does not
stay on (with AC on). Could this be an indication
that the system need to be recharged? or
something worse.

It's not blowing cold air anymore and wasn't too cold anyway from the get go.

If it is only in need of a recharge, do I need get the old stuff sucked out or is it safe to drain it myself, in other words is the freon in this condition not bad for the enviroment?

Thanks.

Jim