Hello, I found water under my inside A/C unit & outside pipe was frozen. I turned off A/C & let thraw & changed a dirty filter. I turned my A/C back on. If this doesn't fix problem, what is my next step? Thanks!

Frost is not uncommon when the humidity is high. Was the inside coil frozen as well? There is a drain somewhere that allows the condensate to run off, sounds like it's plugged. If the inside coil is frozen, you have a problem with air flow... more details will make this easier to answer.

Catsr - The next step would be to call a A/C repair person. Most of the time when you get a frozen pipe and the front grill it is caused from being low on freeon. IF you have someone come out < do have them to find a leak, so this has a better chanch not to happen agauin ::: GOOD luck and GOD BLESS ::: F.B.E.