How to diy ac recharge on a 1996 Audi A4 that doesn't have low pressure port
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I really need a diy fix. I would take it to a professional if I had the money to pay them for recharging the AC. If someone knows first hand how to diy I would greatly appreciate it if you shared.. I know that the car doesn't have the normal low pressure port, which is so stupid and doesn't make any sense to me.. it's the only car in the world that had no low port making it hard to find a diy video/message of some kind letting all of us know is there ANY WAY to diy.. PLEASE HELP ☺
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Get yourself a mastercool 82272 adapter at Napa (Napa Part NTE 783618 expensive at $19.99), autozone (Santech M0948 - $12.99), or your favorite parts place, they probably cost between 6 and 10 bucks .. Its a 1/2" ACME thread adapter but it fits onto the metric threads of the low pressure port just fine, and won't screw up the threads .. Disconnect the plug from the low-pressure switch, and install a jumper across the terminals .. Whatever you use for the jumper, I suggest that you put tape or some insulator over it so there are no accidental shorts.
Unscrew the low pressure switch, it will puff out a little freon and compressor oil as you remove it but the fitting's schrader valve will prevent any more from coming out .. Next install the MasterCool adapter, which will not cause anything to leak. Next start the engine and set the AC for LO temp and maximum fan .. You should note that the compressor is spinning; nothing on the front of the pulley should be motionless .. Connect your R134a container to the MasterCool adapter and press the filler button .. You should feel the can get cold if refrigerant is being pulled out of it .. If you have a guage set you can use it to charge to the proper high and low pressure readings, then disconnect everything, take the adpater off and reinstall the low pressure switch .. Remove the jumper wire and plug the wiring harness back onto the switch and your done.
Thank you so much for your help..However I couldnt find the Mastercool but I did find retrofit parts kit..will that work its just the valves for low and high
Good morning I have a quick question about the jumper part of your instructions..when you say jumper am I supposed to attach something to the switch and the battery as if I was jump starting the car. If so what do you recommend for me to use
Use paper clip,etc to jump the switch *wire ‘connector’ terminals* to each other..
(When the switch is disconnected - you’ve got to complete the circuit using a *jumper*)
IF uncomfortable with the procedure - seek qualified *hands-on* help.
Thank you so much for your help..However I couldnt find the Mastercool but I did find retrofit parts kit..will that work its just the valves for low and high
Retrofit adapter will work - however due to the design / material it will just be harder to remove once installed.
Good morning I have a quick question about the jumper part of your instructions..when you say jumper am I supposed to attach something to the switch and the battery as if I was jump starting the car. If so what do you recommend for me to use
Use paper clip,etc to jump the switch *wire ‘connector’ terminals* to each other.. (When the switch is disconnected - you’ve got to complete the circuit using a *jumper*)
As stated - if uncomfortable with procedure - seek *hands-on* help from qualified personnel. Good luck!