1996 Audi A4 Fill adapter

SEALEVELRAM

MEMBER
1996 AUDI A4
6 CYL
AWD
MANUAL
150,000 MILES

I want to refill the A/C, check for leaks, etc. I have done this on other cars.

This car has the low pressure switch on the low side of the system (obviously) where the fill opening usually is on most cars. The manual says to take off the lp switch, and use an adapter to then fill the system. I can take off the switch. There is left a 3/8" (?) Male fitting.

My question: where can I purchase the adapter? So far my web search has been unsuccessful.

Thanks,
Sealevelram

3 Replies

RACEFAN966

MECHANIC
5,029 POSTS

Ok here is what I found. There is no special adapter. It is typical 134 freon with the quick connect connectors as every other car with 134a has. Here is a pic of the high and low pressure connector. The high is on the front of the condenser on the right side. The low pressure connector is on the back of the A/C compressor at side.

All you need to do is remove the cap and hook up the quick connect connectors no need to remove the shrader valve, then start the engine turn the a/c on max and recharge it.

Pic of the fittings.

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Saturday, September 26th, 2009 AT 8:44 AM

SEALEVELRAM

MEMBER
2 POSTS

I am having trouble with this answer.

Have any of you PERSONALLY put your hands on this low pressure connection? If so, I need more info on the location. The picture you sent shows it in the tubing.

Thanks

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Friday, October 2nd, 2009 AT 2:02 PM

RACEFAN966

MECHANIC
5,029 POSTS

Ok follow the larger line or low pressure line to the back of the compressor. Just to the side you will find the low presser connector should look like the pic. Now the high side connector is at the front of the car on the right hand side (passenger) at or near the condensor that sits infront of the radiator. For the low side connector look at the pic below of the compressor for you car. If you look at the back you will see a cap on a fitting there on the side that is were the connection is for the low side. Hope this helps.