Tried my AC in my 4Runner today .I have 4 vents in dash.Out of the 4 .2 were emitting warm air and 2 were emitting cold.Do I need a freon recharge. Y

Check the blend doors.

Blend Doors?

the box that holds the components for the inside a/c parts have mixing doors in it to allow heat or cold or a mix for defrost etc..
these doors are moved by either vacuum pots or motors.
normally vacuum but newer cars might be different.
sometimes those pots go bad. you can see the actuator arms from the outside of the box but you have to lay down upside down and look up into see most of them.
a mirror on a stick can help too.
by moving the knob/lever or whatever yours has from heat to cold, or just starting the car and shutting it off you can see if they move like they are supposed to.
based on your symptoms, one of the doors doesn't move.
unless you have zone heating and cooling.

Check your cabin air filter. A dirty filter can restrict the airflow coming out of your vents.

Possibly animal nest?

You have an ac leak somewhere.

Sounds like a low charge. In my Buick when it gets low it only blows cold on the pass side.

What year?


My 2006 developed a small leak in the evap that I had to recharge the last two year before I sold it in 2022. It's a common problem that , if i remember correctly , you have to pull the dash to replace.