Arrived on site for 2c maintenance Turned on both thermostats (2 Tstats. One oer unit) Went to attic to check on evaporator coils and check Metering device: Piston. Filter was a little dirty but wasnt due, was changed 3 weeks before todays visit. Went to basement and inspected evaporator coils. Piston. Went outside and determined small unit is upstairs. Bigger is down stairs. Washed unit inside out with chemical and water.
