I wish I knew!
If the compressor is running, the blower is blowing, and there's no cold air, you need freon. If the whining is from under the hood, the compressor may be damaged. That's what happens when running without freon.
the control cable probably came off the connector
Is it blowing cold air only or not blowing any air at all.
it is blocked and needs to be flushed out
when turning on air conditionor for cold air only get hot
low on refrigerant or the compressor isn't running..
This means your Jimmy is pregnant with a Jenny.
blowing cool air, is the air only in your mouth... warm air comes from your lungs. temperature also varies by how open your mouth is while blowing air out
you may want to check your coolant level.
Cold start
Sounds like your cooling system termostate is stuck open.