I don’t know what type of metering your unit has, TXV or Piston; but it does not make any difference if ½ the A coil is freezing you most likely have plugged distribution tubes in the A coil. Any unit that is freezing over is without a doubt slugging liquid back to the compressor and that compressor is going to die sooner rather than later.
It would be absolute suicide to reuse the old A coil as it is, and only replace the compressor.
If you do not replace the entire unit make sure your HVAC guy knows how to clean up the system.
Make sure your guy knows how to check superheat, subcooling and airflow and is capable of making sure the system is performing to rated capacity before they leave the job.
If the last guy charged you $750 under warrantee and left it with debris plugging up the A coil he obviously never did the required clean up and startup proceecures and would appear to be either unqualified, unethical or both.
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Today's Featured Article - 12-Volt Conversions for 4-Cylinder Ford 2000 & 4000 Tractors - by Tommy Duvall. After two summers of having to park my old 1964 model 4000 gas 4 cyl. on a hill just in case the 6 volt system, for whatever reason, would not crank her, I decided to try the 12 volt conversion. After some research of convert or not, I decided to go ahead, the main reason being that this tractor was a working tractor, not a show tractor (yet). I did keep everything I replaced for the day I do want to restore her to showroom condition.
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