AC Flush Question
 

I have replaced my compressor, condenser, receiver/dryer and expansion valve. Is it really necessary to perform an AC Flush. Maybe just flush the Evaporator???

Are you replacing due to a leak or a compressor locking up?
Leak
I would say you are good
Comp.
Then you should flush.

Whatever is new doesn't need to be flushed, everything else does.

Bought the vehicle not too long ago , AC didn't work. Had it checked out, clutch on compressor was sheared. I went a head and replaced all the main components other than the evaporator and hoses. So do the hoses get flushed individually as well? I have not put on my heater control valve or expansion valve, I was going to have that done at a shop, along with the flush, leak test and charge, I was quoted $615, I'm already in this $500 so far.

definately flush the hoses as well as everything you did not install new.

I presume u r converting from R12 to R134a. Here's a write-up I posted in another thread. Hope it helps. Again, any old parts, lines, etc. need to be flushed for best results. Some of this may/may not apply to your '93.

If u really want to do it up right, for max cooling results, here's how:

Separate the 4 quick connects (2 @ evap & 2 at cond) and 1 bolt at dryer
Remove the old dryer (it's a filter and probably has compressor shrapnel in it)
Remove the old liquid line/orifice tube (it's also a filter and probably has compressor shrapnel in it)
Pour a/c flush into the evap and cond and blow both out with compressed air
Turn new compressor upside down and pour any/all oil out and re-install
Determine correct amount of PAG compressor oil for a 2000 model XJ
Pour 1/2 of the new PAG oil into the new dryer and 1/2 into the new compressor
Using new o-rings, re-connect everything, double/triple check everything, take your time
Take it to a pro, tell them u added compressor oil and want a vacuum pulled and the system charged with new R134a (without oil)

Kwick Kar Kwick Lube did the vacuum/freon re-charge for $80 on our '98 XJ using their fully automated a/c machine. We now have 34F cold air at the center dash vents.:D

Thanx for the input guys. We'll see how it goes, I'm just trying to get some cold air in my Jeep (seeing I live in Southern AZ), with out paying more than my jeep is actually worth!!