92 Accord EX Overheating

So I bought this car in late June last year and other than this overheating its in great condition. Quick info:
92 Accord EX with stock engine (only parts that have been put on it are replacement OEM)
mileage: 134,000
Location: Kansas, USA (100+ degrees is normal in the summer here)

I had this same issue last summer and eventually had to replace the radiator and thermometer. While it did run hot (often above 3/4 on the temp gauge), things really only got bad when i ran the A/C. After the replacement the weather had cooled down and running the A/C was no longer required (or desired), but I did notice that it still ran pretty hot (generally at 2/3 or more). Now it's getting warm again and the car is running hotter and hotter and I really don't want to have to replace the radiator (again). I can go without A/C (but don't want to) and this isn't good on the engine. Any ideas?

Coolant is completely full. No leaks to my knowledge. The radiator replacement was NOT new but came out of an identical car and only had 30k miles on the radiator and no issues. The replacement install was professionally done and not overseen by me. I'd prefer to do this fix myself (want to learn how to work on cars) if possible. Sorry for the long post, just trying to provide as much detail as possible. Lastly, what damage or wear should I be looking for now and in the future in regards to this issue?

hello,have you ck rad fans to see if they work properly.turn a/c on does the fan come on??

I haven't tried running A/C yet (will repost after a detailed test tomorrow). however I checked about four different times today during my normal driving routine and the only times the fans ran is about 30 seconds after shutting my car off and they ran for a few minutes. Never while running.

Today was a pretty cool day and I'm laying off the "hard" driving, (I'm an aggressive driver) so the temp gauge didnt reach max but even after light gramma-esque driving it was still uncomforatbly above 3/4 all day :frown:.

Is there some sort of module or wiring that may be causing this that I could check? I've seen things about early 90's honda's overheating... is this just a characteristic or common defect? Even if so, it can't be good on the engine. Any suggestions on rectifying it?

Thanks.