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Air Conditioning Problem

bilden

Member
Joined
April 30, 2002
Messages
34
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0
City, State
Plano, TX
Year, Model & Trim Level
92 Eddie Baurer
I have a 92 EB 4WD, My a/c stoped working so I thought it would be a good time to change to r134. Put in a new compressor, dryer, and expansion tube. Evacuated the system and did system check, all looked good. Started the engine, got about 50 psi on the low side and the compressor still won't engage. all I hear is a clicking sound coming from my power dist. box. I've read other threads and I didn't get much. Can someone please help me and give me some ideas on what to check in the least expensive to most expensive order? It's really getting hot here in Texas, about as hot as my wallet is.
Thanks for any help.
 



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You should try jumping the connector to see if the compressor is at fault, or the low pressure switch.
 






It's a new compressor and the old one did the same thing. I'll try jumping the low pressor switch and see what happens.
Thanks,
Anything else?
 






There is an excellent thread on A/C in the "usefull threads" forum - I suggest you hit that up.

Also - try connecting the clutch wire to +12v. That wire is the "end electrical result" of the AC system - if that wire gets no juice from the car, then its the electrical system(control, pressure switches, etc). If giving the clutch wire juice does nothing, then the clutch/compresser is at fault.
 






Thanks for all the help. I jumped the low pressure plug and BAM! "it worked :-)" that probably was the problem from the start after $300.00 later. Oh well live an learn I guess. I'll be a lot smarter when I trouble shoot my daughters 93X. My old compressor is probably still good. I suppose I can still use it if that's what's actually wrong with hers.
Again thanks for all the help and I've learn to do my research here before the next time I get my tools out.
 






Don't know if you'll read this but I've done about a dozen r-12 to r-134 conversions on Ford products and........

'95-'96 Taurus/Sable r-134 compressors will fit 4.0 OHV. $25.00 at a good salvage yard. Only use one that YOU remove from a car... Venting r-134 is not a nice thing for eart but not nearly as bad as r-12. Get yard to evacuate it for you if necessary.

There is a FLUSH solvent that You really should use since the oil used in r-12 systems is NOT compatable with oil used in r-134 systems.
The combination of these two oils can create a nasty black goo that will toast your new compressor!

Always replace the filter/dryer when changing over.
The fitting retainers are a bear but you can get the plastic ring tools for cheap and then you'll have em when you change a fuel filter.

Hope you read this before you get the killer black goo death!
 






stilbo i'm in NW indiana also, what town are you from
 






Ya, I plan on changing the dryer and expansion tube when I convert my daugthers 93X this weekend. I haven't had a chance to troubleshoot her A/C yet but I have a spare compressor and a low pressure switch only costs $11.00 at AZ. They say that if you run the vacum pump for 15-20 minutes you should be able to suck most of the old oil out along with any moisture. Hope it works!.
Thanks for the help!
 






You are going about it the right way. As long as the system is open, I highly recommend you flush the condensor and evaporator. and yes 30 minsor so, with a properly operating electric pump WILL suck out 50-70% of the old oil. If you are going from R-12 to R-134 be sure and use ester oil.Good luck.


Happy Exploring


Chris
 






The 15 oz. cans of R134 says on it that it contains 3 oz. of oil that comes with the conversion kit. I hope this is the oil that your talking about that the compressor needs. What's the best way to flush out the condensor and evaporator once the system is open?
 






I have a flusher that consists of an aluminum container that holds probably around a quart, an air connector for an air compressor and a hose that goes to a traditional air gun with a rubber nozzle. You may be able to fabricate something yourself, or if you want I can post a site where you can buy it. I am not at my home puter with that link but if people want I can post some valuable A/C sites. Something similar costs around $75 as I recall last time I saw it. Mine has been through a few hoses and guns but the rest works fine. STILL cheaper, if you buy it, that paying soneone else. Maybe you can buy it and it can be resold and resold on here <g> We ought to start a tool rental or swap forum on here for these things. <g>.

I am going to guess that the kits are using ester based oil, which is at least somewhat compatible with the R-12 mineral oil (e.g not INcompatible). The other oil used with 134 systems is called PAG oil and it is NOT compatible.

If you have any other questions feel free to post them here or visit www.aircondition.com and post them there. That site is to AC what this site is to Explorers. Good luck.

Happy exploring

Chris
 






Thanks for all your help. I'm going to see what I can rig up this weekend. I'll keep you guys posted.
 






Out of curiosity I checked a good supplier with an e xcellent online link to see what their flushers are going for these days. The link is www.mvpro.com. Their flushers are only $35 and they have a special on ones with dented flush cylinders for $22. WELL within the DIY budget!!

Happy exploring

Chris
 






Thanks for the great link. The site had a bunch of other good stuff too!
 






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