[MoparBoy72]

The A/C in my 92 stopped blowing cold air the other day after two days of good use. My 968 was converted back in the day to 134a (gas and fittings only from what I can tell). I was hoping to see if a short charge would restore cold A/C.

there is a blue port by the drier bottle and a larger red port on the rear of the compressor. from the info I found while searching it seems that on 93+ the rear of the compressor port in the LP side. Is this opposite on the '92?

Any ideas or a link to a good FAQ would be helpful.

Thanks!

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[Ryan]

I charge my 92 (also retrofitted to 134a) at the compressor.

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[banditsc]

You always charge from the blue low pressure side and not the red high pressure side. With the R134A fittings they made it so they were different and the charge hose wouldn't attach to the high side. If they put the fittings on properly charge from the blue port. Your probably need to dig into it and replace all the o-rings in the systems and possibly the hoses.

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[jfrahm]

Check and make sure the color codes are correct. The low pressure fitting on my 92 is right by the compressor and I put the car up on ramps to access it.

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[Ryan]

Also make sure that the compressor is not kickin on when you turn on the A/C. The warm air could be a result of a broken head-unit linkage clip. This will allow hot air to overpower the a/c and the unit does not need a recharge, but a clip-fix.

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[jfrahm]

Good point, it could also be a leaking heater valve letting hot water into the exchanger.

Looks like a port on the line at the drier is a high side port:

http://www.youfixcars.com/automobile-air...oning.html

Conversion kits usually come with two conversion ports that screw in on top of the R12 ports, maybe these ports were put on wrong. the 968 low and high side schrader valve ports for R12 are the same size.

-Joel.

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[kwikt]

My 92 has the blue low pressure fitting on the compressor facing the driver side wheel. Above this port is stamped S for suction. There is another port on the backside of the compressor also. And of course the red high side under the hood on the drivers side. Just charged mine last week and it works great.

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[MoparBoy72]

It seems that a rocket scientist converted my 968 in '09...Could the system even be charged this way?







Am I correct in thinking if I remove the fittings the rest of the refrigerant will leak out?


TO Ryan,

I removed the cover and all seems well linkage wise...



I did notice the A/C compressor is on but does not cycle.

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[Ryan]

If you remove the fittings you will have to pull a vaccum on the system before you recharge because there will be air in the system. What a pain.

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[banditsc]

The fittings are definitely switched around. The original Schrader valve should still be in there, so removing that fitting shouldn't open the system up. Just pull them off and swap them around. Any A/C expert should now that the receiver/drier is the high side, why they did that is beyond me. You could always go back to that shop and say fix your mistake.

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[jfrahm]

Can you switch the caps? If so maybe the caps are just on wrong and the fittings are correct?

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[MoparBoy72]

[quote name='banditsc' date='Jun 3 2010, 08:44 AM' post='94129']
The fittings are definitely switched around. The original Schrader valve should still be in there, so removing that fitting shouldn't open the system up. Just pull them off and swap them around. Any A/C expert should now that the receiver/drier is the high side, why they did that is beyond me. You could always go back to that shop and say fix your mistake.

Epic failure... I pulled the high side fitting and evacuated the remaing refrigerant and oil charge onto my shirt. The original schraders were pulled. The LP 134a fitting is now hiding in my garage never to be found...

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