Basement Furnace cleaning: heat rise was 49. Air filter system was clean and recently changed out by customer. Air movement system was dirty so I cleaned off with wipes as best as I could. All wiring was clean and secure. Flame sensor system was clean and clear of all debris. Flame gateway system was clean and clear of all debris. Cleaned off inside and outside of indoor unit. System was up and running at normal operation at the end of the visit.