Not only this vehicle but many today are made with the smallest possible volume of refrigerant, smallest compressors barely adequate for hot climates and then only while running 30+MPH in drive or slower in 2nd to keep the compressor speed up.

I have to idle a lot and there are two a/c issues, One is slow compressor speed -not enough volume of gas being moved. The other is low condenser air flow, which is improved with an electric fan that can be use at idle or low RPM. The engine never overheats BTW.

There is a cargo partition installed and that helped.

I didn't find a better fan clutch from Ford and know too little about aftermarket ones (and marketing lies) to go there yet.

It seems to me a larger displacement compressor would cure the rest of this and allow the rest of system to run at capacity as long as the condenser is cooled.

I don't expect miracles but I recall the cars from the 1970s and the Frigidaire /GM A-6, and the Chrysler V2 compressors. Those kept cold air blowing at idle - even when it was 100 degrees outside you would get 45 deg air idling. That is what an AC in a vehicle should do. So, I know what I have been incrementally chiseled out of over the years on newer and newer vehicles despite ever-rising prices for same. It can be done..

It's not time for complaining about that but it is time to find out what higher capacity compressors will fit the 2012 E150 with the 4.6 Liter V8.

On mine it's mounted low and hard to see but I hope someone may know the displacement and RPM stats on it and can suggest sources for replacement that will fit. Ideally, 2x should do it.

I already tried checking the 'rear air' option and the compressor is the same.

I also looked into the up-idle kit, but there is not one for 2012, only 2013 and newer. Idle-up is only a band aid because it uses a lot of fuel rather thab addressing the deficiency but it is worth considering.

If anyone has improved their a/c or changed the compressor to a higher displacement one, I would be grateful to hear about it. Now's the time to work on this, because in 5-6 months it's going to be 100 again.