Airconditioner HELP
 

So far I have had 3 men working on my aircon. They are all stumped as to what is the problem. It is working, however it cuts in and out at 1 minute intervals. Has anyone got this problem ???????? or had it.
( this has nothing to do with temp gauge)
pleaseeeeeeeeeeeeeeeeeee HELP it's hot here in Queensland.

JoAnn :(

Now that i think of it, I beleive ours did that as well and our techs were confused as well. The only problem they could find were some small holes in the compressor. At this point nothing has been done to the system except we put in Duracool with some leak sealent. We didn't replace the compressor (didn't have the money at the time) but i'm thinking about it now. We just removed the belt. I would LOVE to get it up and running again. But from what i remember it would go on and off all the time. Pleeese let me know if someone knows why this is happening.

Thanks

My guess is either moisture in the system and/or an improper amount of refrigerant.

could be a issuse with one of the sensors do the techs know how to enter the dignostic mode on the climate control system?

Not me, still new to the car, but if i knew how i would check it out.

I am assuming that you are referring to the magnetic clutch which mechanically links the A/C compressor to the drive pulley.

According to my service manual, if the outside temperature sensor detects temperatures lower than 10 degrees centigrade, the anti-freeze protection mechanism will cycle the compressor on and off.

You should check your outside temperature sensor - does the temperature display correctly when the "OUT. TEMP" button is pressed?

Jason.

I have also found out that the output of the Evaporator Temperature Sensor can also control the compressor on-off operation.

Unfortunately, the output of that sensor cannot be read easily - unless you have a Subaru Select Monitor!

The other device that could affect the compressor is the Trinary Switch, located on the left-hand side of the condenser. This switch automatically stops the compressor from running if there is too much, or too little refrigerant in the system.

Jason.

Thanks for the imput everybody:) , I will pass all of it onto the aircon man.
JoAnn

Air con trouble codes.
 

Hi JoAnn,

I think it would be best for you to pull the trouble codes, from the air con computer, and tell us what the code number is. We then may be able to go further with finding the fault.
The process for posting the codes were in the set of sheets that I sent you. If you have given them to the air con guys, you can see them again here.
http://www.subaru-svx.net/photos/user.php?oab_au|35851
Just follow the sheets to have the code number displayed on the temp dial.

Also you say that "it cuts in and out at 1 minute intervals", What is it that cuts in and out, Is it the air con clutch, the cold air, or the fans

Harvey.;)

I agree with Harvey. It would appear that the one minute interval reflects the upper and lower set points and a sensor fault is indicated.

Air con
 

Thankyou for all those who have been helping Joann. I am one of the People who have been working on it and this is what I have found to date...... Have followed procedure for fault codes and no code was recorded, Have checked all gas levels and Pressures and all are fine have even disconected trinary switch and bypass switch and still the same. Of the 3 people that have worked on it ....The electrician seems to think there is a problem inside but did not go into detail as I dont think he knew exactly what it was but he did check out all fan and a/c wiring, myself thinks the compressor is faulty as in internal overheating, and the other tech thinks it is a control panel. The biggest problem we have is limited parts and can be expensive for new parts. The svx is not that common either which makes it a bit harder I think the last one I saw was about 3 years ago........... One of the most common things over looked with cars that are getting older is cost, Eg. 89 EA Falcon can be bought for $500 to $2000 cost to repair A/C is Compressor $1200 Evap $740 Cond $500 TX $250 the list goes on (these prices are labor gas part etc) The other problem we have is what you fix today say Condensor,Then Evaporater or Compressor is not far behind from failing as well. Some Compressor's Eg. 05 MG can cost $5000. I havent rang Zupps yet to see what a SVX Compressor would cost but I would hate to think. As far as second hand, I have seen a customer take a compressor back 5 times to the wreckers and sure they will happily give you another but they do not pay for labor and gas.
He had to wear that 5 times until it was right. (and no you cant see how good they are just by looking at them, they must be connected and running just to see if they pump or are niosy).

So where does this leave Joann ... If anybody has a control panel to lend her that would be great, This would eliminate that one. But we do thankyou all for your input any other info would be good.

You have not answered Harvey's very sensible and important question :-

Also you say that "it cuts in and out at 1 minute intervals", What is it that cuts in and out, Is it the air con clutch, the cold air, or the fans.

I have an idea but can not proceed without an exact answer to this query. Also of special interest :- Is the interval of one minute precisely regular ?

All three at once, clutch is the aircon,which means when the clutch is off the cold air stops and when clutch turns off so does fans this is normal on all cars.

The 1 minute is not precisely regular, I have seen it go longer..

I also said before that using Harvey documents for finding codes did not output a code after doing this test....

Aircontech. welcome to the site.
 

Gid'ay mate,

thanks for registering here and helping JoAnn with her problems, as she is not fluent in "auto speak'.:D
With no codes posted, we can at least rule out a lot of things that the computer would know. So the problem is that the compressor clutch is releasing to turn the compressor on and off. There is a bit of interaction between the engine computer and the Air con unit.
Normally the compressors out put is controlled by the wobble plate angle, but the engine computer will turn the whole thing off for a few reasons. I'll have a look see what I can find.
As far as swapping parts go, the US version is not the same as the Aussie and Jap one, but I seem to remember there is a member in Brisbane that had a 'front cut' I'll see if I can find out who.

Thanks again for your help.
Harvey.;)

Hi harvey
Mate I could be wrong but I think the Compressor has a Thermal fuse not a Slip Sensor on it..we tried bypassing it but did not do anything, this also had the Electrician stumped. .... Slip sensor is a device that matches compressor speed with engine speed. It's located on the back of compressor. The slip sensor does use that wobble plate to get its signal.

But having said that slip sensor do go off in a couple of minutes where as a Thermal fuse can take up to 30 minutes.

Looking at wiring diagram 6-3 from you, they call it a solenoid actuator??