Engine Replaced then b1498 AC Problem

Had my engine replaced months ago, which led to AC no longer blowing cold air and a b1498 code. Guys who replaced it said the problem was the high voltage cable. Bought a used one but my regular mechanic said that wasn't the problem. Took it to Toyota and they said the problem was wire harness #2 (wanted a fortune to replace it) & a fuse but couldn't be sure that there wasn't more wrong with the compressor once that was fixed. Took it to another place that replaced the wire harness & fuse for a reasonable price but AC is still blowing air that's not cold. I'm trying to figure out if the problem is that I need to replace the entire compressor (which I don't think I'll do based on the prices I've seen) or if there is another likely explanation. If it's blowing air but the air isn't cold is that a symptom of an entirely bad compressor? Any knowledge you can share is helpful.