Basement unit, Checked stat, ok Cycled unit for 10 minutes, ok Disabled humidifier for season. Checked filter,changed filter Checked blower, ok Flushed drain Checked outdoor unit, ok Washed outdoor unit. Attic unit: Checked stat, ok Cycled unit for 5-10 minutes Disabled humidifier Changed filter Flushed drain Checked blower, ok Checked outdoor unit, ok washed outdoor unit.