Performed furnace maintenance on York units. Started with unit that’s in the kitchen area attic space. Cycled system for heat. Verified proper heating sequence of operations. Temperature rise is within range. Ran system through 20 point inspection checklist. Cleaned heating and blower cabinets. Filters were not horrible, homeowner was going to replace filters on her own. Blower motor is pulling higher amperage than what we would like to see. Gas line has no sediment trap, and condensation safety switch that was once installed with the unit is cut, wires are nowhere to be found. Went over findings and recommendations. Homeowner chose not to have me perform maintenance on 2nd unit as the attic access is in her sons bedroom, and he was still asleep. Cycled system, system is operational upon departure.