Overheating

When air conditioner is on the fan should lock and might not be, scan for codes as yours is a semi electric hookup and may not be doing that. If only overheating with air conditioner on he may be right and it is not working. it may not be increasing speed when you rev the engine. also make sure you do not have things like bug screens in front of radiator/condenser as they cut 15% of air flow.

This guide can help as well

https://www.2carpros.com/articles/engine-overheating-or-running-hot

Please run down this guide and report back.

If the fan clutch is weak or bad, it will not increase the fan speed as under hood temperatures increase. Thus, it will overheat. Since everything else has been replaced, that would be what I suspect is bad. I have, however, seen situations where the lower radiator would collapse under certain conditions. Therefore, when the engine begins to get hot, check both the lower and upper hoses.

That actually sounds slow.

Check all connections to the relay to make sure there isn't a corrosion issue or a pin that has been pushed in and not making contact.

Check to make sure your fan is turning properly and that the van shroud isnt cracked. Sounds to me like insufficent convection due to those

Go to a parts store they have a kit that checks the hydrocarbons in the coolant.U have poss. A cracked head or a bad head gasket.

Thermostat? Installed properly? I once got 3 bad ones in a row (just a bad batch) even brand new stuff can be defective

there could be other possibilities such as build-up inside the radiator (have professionally cleaned or replace, the auto parts store flushes usually won't touch the heavy internal build-up). The radiator is supposed to efficiently transfer the heat from the water, to the outside air.

Vane restrictions from mineral build-up will not let the water flow thru the radiator fast enough---this would be like pinching off the main hoses into the radiator. If this is the original radiator, this may very well be the problem if the other stuff checks out

i have seen this issue a lot in my region, with minerals in the water supply. If the entire system has not been flushed out, rusty water etc could prevent the radiator from doing it's job

a head/ head gasket issues can cause overheating. Symptoms might be loss of coolant, running rough, water in the oil, oil in the water

good luck

keep us posted

the medic

I would be looking at getting the radiator core cleaned as you may have partial core tube blockage, this sealant is a waste of time and money, often they cause more problems and can compound others as well.

Fill the system and use a pressure tester, this will pinpont any leaks. Could be as simple as a hose, or cracked recovery tank, to a head gasket.

That code is "Cooling fan control circuit" problem. You need to test the inputs and outputs of the relay and the relay itself.