My Goodman central air conditioner, CKL30-1L, will not cool the house at all. No water drainage appears from the drain pipe on the furnace in the basement. When the unit is turned on, the air blowing from the unit outside blows cool, rather than warm, air. What's the most likely problem?

Sounds like the compressor isn`t running,, could be something as simple as a bad capicitor,, find it and see if the top is bulged up, it should be flat on top,, you might have to turn off power ,mark wire as to where they should go remove and take and have tested,, be sure to take a screwdriver and short the posts together to get rid of stored power in capicitor

I have the exactly similar problem, did you able to change the compressor capacitor if then I would appreciate if you can share which capacitor to buy and from where and how easy it replace it.