Arrived at customers house to complete maintenance. Tested unit in both heating and cooling. System charge is within range. Furnace operation is perfect, with a nice pretty blue flame. At this time all coils are clean and filters are clean. I found a few things that fail inspection. I found the capacitor on the outdoor has failed for the fan. I found the outdoor unit has fallen out of level. These things are on the ac side of the system. At this time furnace operation has passed inspection. For more info, refer to checksheet.