Customer stated that the ac has not been cooling. When it first starts up, it cools but slows down after a bit. Also found some water under furnace. Filter was dirty, but clogged. Tested indoor coil with refrigerant sniffer, found indications of leaks on coil. Cleared drain line. Cycled system. Checked electrical compartment. Capacitor tested ok. Contactor looks ok. Compressor tested low. Fan motor tested ok. Hooked up gauges and checked pressures and temps. Found indoor coil to be at 19 degrees, subcooling is at 20. Indoor temp split is 12. All the indications lead to leak in system. This causes indoor coil to freeze. This also causes damage to the compressor. Average life expectancy for this unit is 14 years. This system is 14 years old and very worn. Second opinion is recommended. System will not cool. Cleaning not done due to issues found. Job complete.