Toyota - Echo :: 2000 - AC Works Intermittently With No Apparent Rhyme Or Reason

The AC in my 2000 Toyota ECHO died a couple of years ago. With the record heat this year, we finally decided to get it fixed. On the first try, the mechanic thought it just needed some adjustment and recharge, and we wanted to save money, so we went that route. Didn't work--kept blowing the fuse. The mechanic advised that we'd need a new compressor. We obtained a remanufactured compressor and had the mechanic install it. Seemed to work OK at first, but now it works only intermittently, with no apparent rhyme or reason. I'm wondering whether it was a mistake not to replace the condenser and drier as well. (Obviously, we were trying to fix it on the cheap!) If we replace the condenser and drier now (about 3 weeks after replacing the compressor), is that likely to fix the problem?