Diego Hernandez
Detroit
Summary
Detail-oriented Refrigerant Systems Technician skilled in performance testing, data collection, and troubleshooting. Demonstrated ability to collaborate effectively with engineering teams to deliver accurate, high-quality results.
Overview
9
9
years of professional experience
1
1
Certification
Work History
Refrigerant Systems Technician
Reliance (Hanon Systems)
Novi, MI
06.2023 - Current
- Collaborated with engineering teams to understand test requirements and execute validation plans for refrigerant modules and HVAC system components.
- Conducted performance testing using Module Performance Testers (MPT) to evaluate refrigerant module functionality, efficiency, and reliability.
- Performed refrigerant charge determination testing and optimized test parameters, including superheat (SH) settings, to achieve accurate and repeatable results.
- Executed oil circulation testing to assess system performance and refrigerant/oil behavior under various operating conditions.
- Tested systems using both R1234yf and R290 refrigerants in ambient and controlled environmental test conditions.
- Analyzed module and component limitations to ensure testing was conducted within design and safety requirements.
- Delivered test data on schedule while maintaining high standards of accuracy, quality, and documentation.
- Troubleshot test equipment, instrumentation, and system performance issues in collaboration with engineers to ensure reliable and accurate data collection.
- Supported product development and validation activities by providing detailed test results, observations, and technical feedback.
- Maintained compliance with laboratory safety procedures and refrigerant handling protocols.
HVAC Service Technician
Advance Heating & Cooling
Redford, MI
10.2019 - 02.2020
- Assisted HVAC technicians with the installation of residential and commercial air conditioning systems.
- Installed, maintained, and repaired boilers and hot water tank systems.
- Assisted with the installation and startup of rooftop HVAC units.
- Utilized hand and power tools to complete HVAC installations safely and efficiently.
Assembly Line Production Worker
H.O. Treice
Oak Park, MI
07.2017 - 09.2019
- Assembled pressure gauges, temperature instruments, regulators, and control valves according to production specifications and quality standards.
- Built thermometers using aluminum cases and glass tubes, ensuring accuracy and product reliability.
- Worked collaboratively with team members to meet daily production goals and maintain efficient workflow.
- Performed inspections and quality checks to verify finished products met company and customer requirements.
Education
Climate Control Tech -
Northwestern Technological Institute
Southfield, MI10-2019
Skills
Refrigerant Systems Testing
Instrumentation
Data Collection/Reporting
Troubleshooting
Brazing
Certification
EPA 608 Universal certification
EPA 609 auto air certification
R-410A certification
Tracpipe certification
Languages
Spanish
Native or Bilingual
Timeline
Refrigerant Systems Technician
Reliance (Hanon Systems)
06.2023 - Current
HVAC Service Technician
Advance Heating & Cooling
10.2019 - 02.2020
Assembly Line Production Worker
H.O. Treice
07.2017 - 09.2019
Climate Control Tech -
Northwestern Technological Institute