Arrived on site for maintenance. Both units were running normally upon arrival. When inside to the basement for the first floor AC air handler. Inserted temperature probes to check the temperature split which peaked at 17. The unit uses R22 for the refrigerant and also the metering device is a txv. Change the filter which is located behind the AC on the bottom. Went outside and washed down the condenser unplug the disconnect from the condenser to work on it safely and took it apart to wash it down with chemical and water. After washing the condenser with chemical and water put the condenser back together and plugged in the disconnect to start it up. Condenser started up normally and proceeded to check pressures which were good. Went up to the attic to look at the air handler. Customer stated that they change the filter for the second floor.
