Furnace tune-up and safety inspection. Cleaned and serviced 2 furnaces. One in the attic. Replaced the AprilAir 401( space guard) filter in the basement furnace. Tested all mechanical components. Cleaned all sensors. The basement furnace is from 1997. System is working adequately for its age at the moment. The attic furnace I tested all mechanical components. Cleaned all sensors. Found standing water in the drain pan. Vacuumed out all the water. Found drain stubbing not pitched correctly. Shimmed tubes up for now; however, the drain should be replaced. The system is clean, heating, and working adequately at this time. Giving customer estimates for the drain pan safety alarm float switch and new basement furnace.