Troubleshoot and repair compressors and condensers, locate and repair refrigerant leaks, weigh and charge refrigerant systems, replace condenser and fan motors, replace sensors and floats, make adjustments for ice thickness and cube defrosting, and be able to perform preventive maintenance on all associated equipment. Troubleshoot and repair any PTAC unit on property, including refrigerant evacuation, leak testing, compressor replacement, controls troubleshooting/replacement, heater section, and blower unit troubleshooting and replacement.