I have a 2002 Ford F-150 Lariat Super Crew. I live in South Florida and what a grest dsay for my A/C to go out.
So here's what I experience.
When i hit the max power button, I can put my hands on the vent and feel cold air. however there is absolutely no air being pushed out.

also, i can hear the engine change sounds when i turn the A/C on -off.

I know very little about cars. I'm a Plumber who's been in my field over 20 years. If explained how, i can fix anything since im a hands on guy.
thank you all for your support!

 

The fact you are hearing your engine speed change when you turn the AC on/off confirms the compressor and clutch are working and since you do feel cold air it also confirms the system is charged and dashboard AC **** is operational.

Sounds like one of three possible things. Either there is an issue with the blower motor, dashboard control for fan speed or a clogged cabin filter. Do you hear the fan when you change fan speeds?

 

Your blower isn't running.

Do you have the manual or automatic climate control system?