Got a 95 accord 4 cylinder lax


So earlier today I was out doing doordash. I had my ac blowing pretty much the entire time I was dashing but then I noticed my temp gauge was going down. Not all the way but it was noticable. Does having my ac on have anything to do with it. It goes back to regular temp when it's not on. I turned it on riding the freeway and it was going down.


I'd like to say thermostat? But a few years ago I replaced the thermostat with an OEM honda one along with my radiator hoses and water pump



Does having my ac on for long periods of time cause this or is this something else

 

My 94 Accord will not handle the temperature generated by the AC if the weather is in the 90's. My other car has a much larger radiator and a huge electric fan in front of the radiator and it does just fine. I think that 94 was the year Honda switched from R12 to R134a antifreeze and they didn't upgrade the cooling system to handle it. I switched antifreeze in my Jeep Cherokee in the late 90's and it never was able to handle the heat after that time.