AC not working- need to replace compressor?

[Red Rider]

Hey all, So my AC crapped out last summer and finally getting around to trying to fix it. I dropped it off at our trusted mechanic since I don't know much about AC work and figured it would be faster/easier (though not cheaper). Plus I have a million things to do at home...

It was out of refrigerant. He loaded it up and compressor was not kicking in. With 145k, From my records from previous owner, it seems like the compressor was never replaced.

Mechanic is recommending replacing compressor and condesnsor. He said (since I do most of the work on my own), that I could save about $1000 if I install the compressor/condensor myself.

I guess I was wondering what others thought about doing it myself and having them charge it, vs them doing everything. My concern was if there was an issue and system was not working after that, there could be finger pointing.

Has anyone done this work before? how long does it take? What do you recommend replacing (other parts like belt tensioner, hoses, etc)?

 

[Joseph Garcia]

If you are going that far, you should change the tensioner and belt, as well.

 

[cheltemes]

If it was "out of refrigerant", you probably have a leak somewhere. If you change the compressor, you should replace the condenser, orifice tube, and dryer as well (along with the belt and tensioner as Joseph suggested). Replace all of the o-rings when you install the orifice tube and dryer (get an o-ring kit).

If you have rear climate controls, there is an evaporator and expansion valve in the rear (right side behind the plastic housing) with refrigerant lines running to them. There will also be a y-adapter for your lines that run to the compressor. You'll want to at least replace the o-rings.

If you're going to do that much of the work, I would charge it yourself so you can see if there are any leaks. You'll need a vacuum pump, ac manifold, refrigerant, and refrigerant oil. You should be able to tell if there are any leaks when you evacuate the system with the vacuum pump before you charge it with oil and refrigerant. Just make sure it holds pressure.