Ac not blowing cold?

I have a 2001 Ford F-150 cat crew cab and when I charged my ac it was blowing cold and now it will only get cold if I have my foot on the gas. And sometimes it doesn't even get cold anymore just hot what do I need to replace

Possibly a cabin air filter, assuming your truck has one. I don't think they were common until 2005.

Sounds like it is not properly charged and can't build enough head pressure to liquify the refrigerant.

If it was blowing cold, WHY did you charge it! That's Really DUMB and you probably OVER-Charged the system and blew a seal. If you don't know what you're doing, STOP DOING IT and find a REAL mechanic who can fix your system properly. It's much cheaper to have it done right the first time rather than having to fix your mistakes.

Go to an AC shop and have them find the leak.

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