Upon my arrival I evaluated 1 Bryant gas furnace system. I verified system safety and performance is to manufacture specifications. Flushed and treated the water removal system. Cleaned the electrical cabinet and cleaned flame sensor. Found the gas outlet pressure tap to be stripped and very brittle due to systems age, could not check outlet gas pressure. Also found the combustion exhaust removal system to be loose on the shaft, creating a grinding noise. Found o other issues at this time. Recommend replacing fuel delivery system and replacing combustion exhaust removal system. Customer wants estimates for repair emailed over to him