Ac Not working
Typically the clutch not engaging is due to low freon level. Or faulty low level switch.
Agreed,,,thinking is a good thing ; )
You stated that the Freon is good, so I am going to assume you had someone hot charge the A/C system with the correct amount of Freon, correct? Check the voltage to the A/C clutch coil with the system turned on, if you have voltage then the clutch coil is bad, if no voltage then you either have a wiring problem, defective pressure switch, main A/C switch or A/C relay.
It's most likely that they pressed a schrader valve, heard a hiss and think it has plenty of R134a. You could always jumper the Low-side switch with a Paperclip to see if the Compressor engages. You should already have a Manifold Gauge Set hooked up so you can see what the Compressor is actually doing and if the system is actually charged. Don't run it too long on the Paperclip - low Freon also means that oil isn't being distributed through the system and could cause a Compressor problem. The Air Gap between the Compressor Clutch and the Pulley should be between about 0.020" and 0.030"
Looking for a Used F-250 in your area?
CarGurus has 605 nationwide F-250 listings starting at $3,995.
Search Ford F-250 Questions
Ford F-250 Experts