JOHAN HERNANDEZ
Conroe,TX
Summary
Chiller/HVAC Service Technician with hands-on experience maintaining, diagnosing, and repairing commercial and industrial systems, including Carrier air-cooled chillers and boilers. Handles preventive maintenance, system tuning, repair documentation, and customer communication to support uptime, safety, and efficient equipment performance.
Overview
2
2
Languages
1
1
Certification
5
5
years of professional experience
Work History
Chiller/HVAC Service Tech
RDI Mechanical
Tomball, tx
05.2026 - Current
- Diagnosed and repaired chiller and HVAC systems, including compressors, pumps, valves, controls, and refrigerant circuits, to restore building performance.
- Serviced equipment such as Addison, Munters, AAON, Daikin, and Trane Intellipak units.
- Diagnosed multiple chiller types, including air-cooled, water-to-water, and process chillers.
- Completed preventative maintenance on equipment from 5 ton split units to 100 ton AAON units and prepared customer quotes with parts and labor pricing.
- Provided customer quotes and collected pricing for parts and labor.
Chiller/HVAC Service Tech
Envirotech Mechanical Services
11.2024 - 05.2026
- Maintain, diagnose, and repair industrial and commercial chillers and HVAC systems, including Carrier air-cooled chillers (30RAP, 30RBS, 30XVS) and a variety of boilers. Troubleshoot residential and commercial split systems, rooftop/outdoor units, packaged units, and outside air systems to restore operation and improve efficiency. Perform preventive maintenance, safety inspections, and system performance tuning to minimize client downtime and extend equipment life. Document repairs, communicate technical issues and recommended solutions to customers, and coordinate parts and follow-up service.
HVAC Service Technician
Weiss Air Conditioning
01.2024 - 11.2024
- Diagnosed and repaired residential and light-commercial HVAC systems, including split systems, packaged units, and heat pumps. Performed preventive maintenance, emergency repairs, and component replacements (blowers, motors, compressors, capacitors, control boards). Conducted system performance checks and recommended energy-efficiency and reliability upgrades to customers. Maintained accurate service records, communicated technical information in plain language, and ensured high customer satisfaction on service calls.
Construction Worker
Texas Pools Inc
07.2021 - 01.2024
- Assisted in construction and installation of residential and commercial swimming pools, performing plumbing, rebar installation, formwork, concrete pouring and finishing, and equipment installation. Followed safety procedures and collaborated with crew members to meet project milestones and deadlines. Supported multiple trades on siteincluding plumbing and concrete workdemonstrating versatility and attention to detail to ensure quality and timely completion.
Education
AAON Controls Fundamentals
Texas Air Systems University
Missouri City, United States01-2026
Boiler Fundamentals
Willbanks Training
01-2026
HVAC/R
Universal Technical Institute
01-2025
Chiller Fundamentals
Advantage A/C Training
01-2025
Skills
- HVAC System Maintenance
- Chiller Repair
- System Diagnostics
- Mechanical Services
- Customer Service
- Chiller maintenance
- Electrical troubleshooting
Personal Information
Title: Chiller/HVAC Service Tech | Chiller/HVAC Service Tech | HVAC Service Technician | Construction Worker
Certification
- -OSHA 10
- -410a Certification
- -Universal EPA Certification
- TWIC
Languages
English Native, Spanish Native
Languages
English
Professional
Spanish
Professional
Timeline
Chiller/HVAC Service Tech
RDI Mechanical
05.2026 - Current
Chiller/HVAC Service Tech
Envirotech Mechanical Services
11.2024 - 05.2026
HVAC Service Technician
Weiss Air Conditioning
01.2024 - 11.2024
Construction Worker
Texas Pools Inc
07.2021 - 01.2024
AAON Controls Fundamentals
Texas Air Systems University
Boiler Fundamentals
Willbanks Training
HVAC/R
Universal Technical Institute
Chiller Fundamentals
Advantage A/C Training