Performed the level 2 furnace cleaning. Burners are very worn along with the heat exchanger. The heat exchanger has large amounts of rust and chipping. No cracks located. Venter motor is also wearing out. Average life of unit is 12-15 years. Furnace is currently between 20-30 years old. Due to age, condition, repair costs, and safety concerns, I recommended a se one opinion to go over options. We will call to schedule.