So to make a long story short, my truck's AC compressor seized up according to the mechanic, leading to a new compressor, tension belt, and tension pulley. Before this happened I had a friend of mine charge up the AC and it was working fine, after I had the compressor replaced it worked okay for a bout a week or so but now it's back to just blowing room temp air.

I'm going to take it back to the mechanic and tell them that the AC was working fine before I needed to get this work done but since i don't know much about vehicles I figured I'd ask for some help on here first.

 

sounds to me like something is leaking, i would guess that it is something he did if it was blowing nice and cold for a while before he did any work on the truck, (points at the refrigerant lines that he had to open and the joints where he did work)

 

Didn't you post the same thing earlier? That was directed to the OP. Did your friend just add a can of freon without using gauges? If he just emptied a can, that is probably what caused your A/C to lock up in the first place. Say that you were low on freon but you just put in 16ozs. or 1lb. of freon. How do you know that it is exactly what your system needed when in reality it should only have taken maybe 8ozs. or 1/2lb. if gauges were not used to see your low and high pressure reading?

 

Yep,

+1 Pete

 

I would like to add, when replacing an a/c compressor you always should replace the expansion valve/H valve, dryer and blow out all lines and condensor or replace if needed.
Do you know if your tech added pag oil to the new compressor?

 

Alright thanks everyone for the responses, hopefully someone can give me some information on this.

I just took it back to the mechanic and after some battling with the guy he said he'd take another look at it. The system has freon in and and the compressor is working properly, the issue is with the expansion valves being clogged. This is what the official work order says:

Work Performed - Perform Diagnostic Analysis: Isolate problem as per customer request, A/C Compressor is working-system is still full of freon. Both front and rear expansial valves STCK-CLOGGED-Not moving most likely due to searl in system. Need to see Chrysler Dealer.

Thoughts would be really appreciated...

 

If the mechanic from the git-go did the proper procedure to repair the A/C system after the compressor seized, you would not have had this problem. He first and foremost did not replace the drier with the compressor. Second, he could not have fully flushed the system. Third, he should have replaced the expansion valves along with the repairs because of debris collecting at the expansion valves causing this problem to happen-clogged can also mean this. Whenever an A/C compressor grenades to the point of locking up the following procedures should be followed. Remove compressor, accumulators (driers), and expansion valves. With all the rest of the lines being open, they should be flushed out along with the evaporator cores and condenser core. This should flush out any loose debris that went into the system from the A/C compressor locking up. Then the new compressor, new expansion valves, and new accumulators (driers) should be put on and a vacuum put on the system. Whenever a new charge is being put into the system, the shop should be putting in the correct amount of oil at the same time. This is a costly repair but is in reality the correct way to repair an A/C system that has had the compressor locked up. Your mechanic screwed up and is now laying blame in other areas when he should be looking into the mirror to see the exact cause after repairs were made and system is still not up to par. You can copy and paste this and take it to your mechanic, I give you permission to do so.

 

Thank you sir for your reply. If anything at this point, I would be going to the dealer to get this done, unless I get lucky and find someone that can do it on the side for cash. Do you have any idea the ballpark figure I can expect to pay for the work you described?

At this point I'd be wasting my time going back to that mechanic because they've already said that they don't even replace evaporator valves there. Unfortunately I wouldn't get any satisfaction if I printed that out, but it's something I am going to take over to the dealer when I explain what my issue is.

 

You are going to have to realize that a Dealership will cost you a lot more than the average shop rate. You will have to call them and explain what you will need to be done and they can give you a ball park figure. Glad to help you in your predicament. Hope you have better luck from a Dealership which I think you will considering that they do have trained Tech's that know what they are doing.

 

Yea I know the dealerships are way up there for their labor and parts. I was going to see if there was any other places that do ACs as a specialty or something before I go that route. I really don't want to be paying $800-$1,000. From what I understand it's going to be a lot of labor hours but we'll see I'll have to look around. Thanks again.