Mads

Hi

My AC has stoped working, i has not been refiled while i have owend the car (since 2004) so it proberbly just needs a top up.
But i don't know if i'm running R12 og R134, can you guys see it by looking at the connector ?

Regards

Mads
Low pressure


High pressure (right by the dryer)

SeanR

Appears to be R-12. The 134 connectors are different. I would test it with vacuum to see if it leaks before filling up.

76FJ55

Below is a drawing for reference between R12 and R134 fittings as stated above it looks like you are most likely still R12.

SQLGuy

Although I understand and support wanting everything in your car to work properly, being in Denmark you probably don't have that much need for A/C. While you're getting the A/C worked out, or maybe instead of working it out, you should look up the procedure for adjusting the air mixer flaps, to ensure that your HVAC is not blowing hot air when it's trying to blow cool air. (The foam on the flaps disintegrates over time, and the adjument procedure is to ensure the flaps are closing completely rather than leaving a gap where the foam used to be.)

Cheers,
Paul

robot808

Defogger?

davek9

Also good to check the Heater Valve at the back of the Head for proper operation, watch for full movement while someone else works the Hot/Cold temp setting w/ the HVAC turned on.
I had to Zip tie one this past Saturday for a friend, it had no movement and the default is open (Hot).

dprantl

An easy way to remember this is if the threads on the charge fittings are on the outside, it is R12, and if the threads are on the inside, it's R134A.

Dan
'91 928GT S/C 475hp/460lb.ft

blown 87

In a perfect world, if it has threads it is R-12, but I could not tell you how many I have found filled with R134A with out labels or fittings, or things worse, like propane.

Any good shop is going to have a tester to find out what is in it.

SQLGuy

Most cars had defoggers long before most cars had A/C. Generally, warm air works too.

Mads

It's hot enough in Denmark at summer My Hot water valve is permanently closed. I have spendt a lot of time to diagnose, and now i just want cold air in the summer i Have changed 2 vaccum diaphram, checked the temp circut many times. So until i have time to do more diagnose the hot water valve is closed.

How can the AC tec see if the system is filled with R12 or R134, can he see it when he pumps the oil out ?

Mads

WallyP

If you are evacuating the system, it doesn't matter what was in there before. Decide what you want, and install the proper oil (POE for R-134a, mineral for R-12) and your choice of refrigerant.

I would always use the new blue or green O-rings, regardless of refrigerant. AFAIK, the only expansion valves available from Porsche are optimized for R-134a, but they work fine with R-12.

In the USA, the Federales are tough on professional shops, so a reputable shop will always install the new fittings with R-134a as well as the required sticker.

VehiGAZ

But AC-dried air works 50 times better. And some of us just like everything in our cars to work.

Mads

Thanks for all the input. I have found a friend who has a AC company, we will refill this weekend

Mads

Stromius

Interesting tool available from Harbor Freight (enzo?):

Includes R12 and R134 connectors to remove moisture. Gimmick? Good deal? Not sure...but at $12.99 might be worth a try? Realizing of course Roskilde is a bit from from any HB stores.

http://www.harborfreight.com/air-vac...ors-96677.html

Ed Scherer

IIRC, those things suck. But not enough.

Pick up a decent vacuum pump off eBay and do it right. (or borrow one...) You should be able to score a decent new Robinair 4 to 6 CFM pump (or equivalent) for under $200.