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AR15.COM
7/23/2013 12:17:55 PM EDT
AC went out in my truck 4 years ago. About a week after the one year warranty on the reman unit ran out the compressor quit.  Well this year 4 and I've since grown tired of changing reman units out that go out after warranty is expired.

Well I purchased a "brand new factory oem" compressor, dryer, the works.  

Is it really necessary to flush a AC system? If so how difficult is it and how do you do it?

Just always been under perception that crap in system gets caught in the dryer
7/23/2013 12:48:50 PM EDT
[#1]
not just the dryer, anything left over lines, might crap out the new compressor.
also most warranties require you flush.
7/23/2013 12:52:40 PM EDT
[#2]
If the compressor failed internally then the material shavings will be distributed throughout the system. If you don't flush the system they can cause a blockage or damage a new compressor. It's cheap insurance for the new unit and will let you keep the warranty intact.
7/23/2013 12:56:28 PM EDT
[#3]
May as well piggyback on this.

What if the compressor is good, but one recharged with R134 with "sealant" in it? (I know, I know)  I figure I need to change the filter drier, but what about the compressor and the Tx valve?