HVAC leaking on whole home unit. Found system to be shut off with water on outside of emergency drain pan. Discovered impeded improperly pitched (runs flat on attic floor) drain line and damaged gasket on emergency drain pan drain line. Found system to have cracked heat exchanger, single wall flue pipe that’s taped. System had no flood protection and high amp draw on compressor with dirty ac and low refrigerant levels of r22. Customer getting quote on new equipment tomorrow morning. Informed customer of cracked heat exchanger advised not to use heat due to safety concerns and left thermostat in cooling position. Added drain line switch, cleaned drain and added wet switch along with siliconed emergency drain pan fitting at pan to prevent further leaks onto attic floor. Tested drain for proper draining and leaks. Drain working properly with no leaks at this time. Tested safety added they function properly.