Furnace inspection: heat rise was 52. Air filter system was clean and recently changed out by customer. Air movment system was clean and clear of all debris and signs of concern. All wiring looked clean and secure. Drain line looked clean and clear. Flame sensor system look clean and clear of all debris and signs of concern. Flame gateway system was clean and clear of all debris and signs of concern. System was up and running at normal operation at the end of the visit.