re: A/C not cooling down: Question

If it's R-22 it will be pricey. The price has been sky rocketing and they stopped making the R22 parts last year so they are harder to come by.

How many intake vents do you have? Make sure filters were installed in proper direction in all.

I would leave unit off, run a window unit. Make sure no ice on outside line. Then turn on unit. Put a box fan blowing air into your intake filter. This increases air flow.

Go to Lowes. Buy 3-4 cans of coil cleaner. Take off cover of AC unit and wet it with water hose, no pressure washer. Then spray on coil cleaner like mad. Let it soak for 20 min and rinse off with water hose. Then button the unit back up.

Go up in attic, look for coil up there and vacuum with a shop vac.

Look for drain line that ties in underneath bathroom sink. Pull it out and stick shopvac in it to clean out as well.

I'm guessing your system is really clogged and needs a thorough cleaning. Usually what happens with a terribly clogged air filter. Have a guy come out with the really heavy duty chemicals to clean the coil in attic.