Performed furnace maintenance on 2001 American standard heater. Upon arrival homeowner stated that system has been working properly and has had no issues. During the safety inspection I did come across multiple points of concerns that were addressed with Kim. 1. Flame sensor was heavily oxidized and can cause failure on ignition if this worsen. 2. System is not equipped with surge protection in the case of a power outage thunderstorm etc. 3. heat exchanger Has severe corrosion and hotspots at this time there are no cracks present although can change in a year due to the high temperatures this heater is running at. 4. Static pressure was 0.90 which is extremely restrictive 5. Gas line was not equipped with drip leg 6. Hard pipe Duct work has air leakage as shown due to the dirt buildup on the insulation Discussed and informed the full condition of Kim’s 2001 American standard. At this time Kim is not ready to replace her system and wants to keep it going as long as possible till it br