A/C Question.

Reply Subscribe

Thread Tools

Search this Thread

Jun 12, 2023 | 08:20 PM

rmrtrex

Thread Starter

Pro

Joined: Apr 2021

Posts: 570

Likes: 101

From: Texas

A/C Question.

I had everything with in reach replaced on my A/C system. Dryer, Orfice tube, new A/C hose to condensor, and new A/C compressor. They put some oil in the system and the rest freon. He was a certified A/C guy. Well it has now been 3 times that the freon comes out of the back of the compressor with pressure. Any Ideas? I think something is obviously clogged in my system, but what?

Last edited by rmrtrex; Jun 12, 2023 at 09:58 PM.

Jun 12, 2023 | 09:40 PM

chevymans 77

Melting Slicks

Joined: May 2002

Posts: 2,716

Likes: 121

From: Sulphur LA

St. Jude Donor '05-'06,'11,'13-'14,'16,'18,'19,'24, '25

has it cooled since the rebuild?

That relief is usually set well over 400 psi

Neal

Jun 12, 2023 | 09:45 PM

rmrtrex

Thread Starter

Pro

Joined: Apr 2021

Posts: 570

Likes: 101

From: Texas

Quote:

Originally Posted by chevymans 77

has it cooled since the rebuild?

That relief is usually set well over 400 psi

Neal

Nope because all the freon came out of backside of compressor. It came out with a lot of pressure and pretty much sprayed onto my valve cover.

Last edited by rmrtrex; Jun 12, 2023 at 09:59 PM.

Jun 12, 2023 | 10:00 PM

chevymans 77

Melting Slicks

Joined: May 2002

Posts: 2,716

Likes: 121

From: Sulphur LA

St. Jude Donor '05-'06,'11,'13-'14,'16,'18,'19,'24, '25

Then yes, I would start with pulling the orifice tube and inspecting it for debris

Neal

Jun 12, 2023 | 10:02 PM

rmrtrex

Thread Starter

Pro

Joined: Apr 2021

Posts: 570

Likes: 101

From: Texas

Is there anyway to check condenser or evaporator for clog? I just want to be able to narrow it down, before I take it back to a/c guy. I can replace the condenser if I have to and maybe the evaporator.

Jun 13, 2023 | 07:28 AM

Mr D.

Team Owner

Joined: Mar 2002

Posts: 44,593

Likes: 1,822

From: Huntsville AL

To check condenser or evaporator for clog you will need to disconnect the lines and use shop air to blow through it, also a good time to flush those two out to ensure they are clean. Your system is building up too much pressure on the high side and overcoming the compressor pressure relief valve.

Jun 13, 2023 | 10:34 AM

70s

Racer

Joined: Jun 2018

Posts: 282

Likes: 139

From: NH

Anytime I do an A/C job on an old car I do a solvent flush on all hard and soft lines plus the condenser and evap core. I do this to remove debris from the system, clean out old oils, etc. I don't know what has happened to the system over the vehicle's life and don't want to throw new parts and materials at the system only to ruin them. This also verifies all passage ways through these parts are open. Nitrogen or dried air can be used to check for clear lines too but if the system has an unknown history (I'm not the original owner and tech!) and I'm replacing the compressor due to failure (plus orifice and dryer with it of course) I prefer a proper flush. A/C flush solvent is only ~$25 a quart so its cheap insurance as far as I'm concerned. Cheaper than refrigerant.

Jun 14, 2023 | 07:04 AM

toylman

Burning Brakes

Joined: Dec 2006

Posts: 974

Likes: 253

From: Bethlehem, PA

You should say what year your car is first, but keep in mind that "rebuilt" does not always mean "working". If you look for information you will find that commercially rebuilt A/C compressors can be as reliable as other commercially rebuilt parts as carbs, alternators, starters, etc.
Getting beyond that and if it is determined your compressor is good. Take the advise given to have the system flushed out and replace the seals. Search youtube to see a flush being done by a shop. At the least you will have to replace the dryer. I don't think your shop did any basic trouble shooting or testing.
I had a stuck POA valve on a '72 system that prevented it from operating.