Concern of 5 units not keeping the space warm. Checked both units on the store area roof. Both are running 160⁰ Vapor line temperatures with 38⁰ outdoor ambient. Checked units in question on the ground and all were running 160-170⁰ vapor line temperatures Found all 6 units on the ground for the south side of the building needed the outdoor coils and drain channels washed Strung together a bunch of garden hoses and washed all the units Advise setting temperatures to higher than normal settings to drive the compressors at higher speeds. The temperature sensor on the indoor units is inside the top of the unit. Air Temperature being sensed is much warmer than what is at ground level. For example, a 70⁰ setting will shut the unit off when the air at the ceiling is 70⁰ while the floor temperature may still be much colder. We will investigate if wall thermostats are available for these units. If they are, this will solve the issue described above. This will also simplify operation