A/C Compresssor

Guero · Aug 29, 2006

I was trying to recharge my freon a couple of nights ago, and after like 10 minutes of idling and with the A/C being full blast. The bottle never got empty, so i was like ok this may take longer. So i kept it idling, and started putting a tie down on the battery. I look down for no reason, and the A/C pully is turning but not the outer one. So i just turned it of, and came inside. I forgot to post it, until i saw 95vert's post.

mo_dingo · Aug 29, 2006

Guero said:
I was trying to recharge my freon a couple of nights ago, and after like 10 minutes of idling and with the A/C being full blast. The bottle never got empty, so i was like ok this may take longer. So i kept it idling, and started putting a tie down on the battery. I look down for no reason, and the A/C pully is turning but not the outer one. So i just turned it of, and came inside. I forgot to post it, until i saw 95vert's post.

You have to jump the LPS connector for the compressor to kick on if the system is empty of refridgerant.

LPS = low pressure switch, located on top of the receiver/dryer aka can/canister. Remove connector, install jumper wire and add refridgerant. 2 and a half cans iirc, but I would just get a hose with a gauge and use the low side pressure to determine proper amount.
Scott

Guero · Aug 30, 2006

whats the proper amount? And how do i jump the LPS?

BlownFiveLiter · Aug 30, 2006

I wouldn't jump the LPS to add refrigerant. In my experience, I've put the can of R134a (freon is R12, btw) in a bucket of HOT water to aid in the charging process. If you had a leak in your system that was repaired, it probably needs to be vacuumed down before you can add any refrigerant to the system. You could fill it, but you'll never get the correct amount of refrigerant in because you're trying to displace air in the process.

mo_dingo · Aug 30, 2006

The system is charged at standard atmospheric pressure, not in a vacuum state. The machines only vacuum the system to remove moisture and test for leaks.

Someone correct me if I am wrong, b/c I cannot find any literature to confirm or dismiss this.
Scott

Guero · Aug 30, 2006

how do you jump the LPS?

AznStanger3v · Aug 30, 2006

StangGT1995 said:
(freon is R12, btw)

actually, freon is a brand name. r12 is refrigerent

BlownFiveLiter · Aug 31, 2006

17yrOldStanger said:
actually, freon is a brand name. r12 is refrigerent

True, if you want to be technical... however Freon was the DuPont name for the CFC refrigerants they manufactured, which included more than just R12. R134a is an HFC refrigerant, and no longer goes by the Freon name. I may be wrong, but I believe they now call it DuPont Suva R134a. I know, I'm a wealth of stupid knowledge this morning

Guero · Aug 31, 2006

I was trying again to recharge the system, i was trying to connecet the bottle while the engine was of, and freon was flying out, then i pressed the other pory by the radiotor, and the same thing. So there is freon in my a/c!!!! So what now???

mo_dingo · Aug 31, 2006

Guero said:
I was trying again to recharge the system, i was trying to connecet the bottle while the engine was of, and freon was flying out, then i pressed the other pory by the radiotor, and the same thing. So there is freon in my a/c!!!! So what now???

You didn't check to see if the system had a charge before adding refridgerant?

Assuming you have a sufficient amount of refridgerant, Check to see if there is continuity at the LPS and the connector has 12V on one contact. If LPS shows open, and the system is charged, replace the LPS. If it's closed, then it's ok. If you have 12V on one contact, make sure the other wire is getting 12V from the LPS. It should go to the a/c clutch, so check for 12V at the a/c clutch. If no, check wiring. if yes, clutch is bad.

If you don't understand what I wrote, you need to do more research on this, or take it to someone. I know you are pretty green, but determined to learn, which is good. Start searching through threads for info or ask someone for help. Main thing is to see if the system is fully charged. The rest is easy if it is.
Scott

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