Customer was having issue to put the door furnace back on place. Showed her the best way to do and signed up for home care maintenance plan. Inspected system. Found a crack in the heat exchanger, blower wheel very dirty, evaporator coil with biological growth, single capacitor weak (4.5 on a 5 microfarad) and dual capacitor weak, as well (42 on a 45 microfarad). System is 10 years old and out of warranty. Sent estimates for potential repairs (not recommend). At this age and conditions, the best option would be to upgrade the furnace (for safety purposes), and bring comfort and efficiency back to the house. New systems come with 10 years warranty and WiFi thermostat. System is heating and cooling, but air quality in the house is poor and contaminated, also, possible Co leaking also. Flue pipe is single wall , rusted and taped, and there is a flex gas line going into the furnace (it should be hard pipe gas line, by code). Customer declined a quote to up at this time. Also, highly recomme