Arrived to no cool on a carrier straight electric system installed in 2013. Primary electrical control had failed and was preventing the outdoor unit to turn on. Replaced electrical control and performed a function check. During function check the technician found the system to be low on refrigerant due to a leak in the evaporator coil. Customer is moving soon and did not want to repair or replace the system at this time. Recharged system with 18oz of r410a. System running and cooling upon departure.