Cleaned and checked air conditioner. Checked drain. Checked voltage and amperage draw of motors. Tested capacitors. Cleaned condenser coil. Checked filter: dirty MERV 16. More than 1” drop. I installed temporary 1 inch filter. Need to order MERV 16 air cleaner media. Checked Freon level: Low again. I talked of Freon level enough to get system cooling nearly full capacity. System is still approximately 20% low on Freon. Superheat: 16. Sub :: zero.