Field Note 01
01
Electrical / Refrigeration
No Cooling Diagnostic
A structured diagnostic approach for systems running without proper cooling performance.
• Thermostat call
• Contactor operation
• Capacitor health
• Temperature split
HVAC Technician • Diagnostics • Service Excellence
Hazael J. Rodríguez Valero
HVAC technician focused on advanced diagnostics, system performance, electrical troubleshooting, and professional service for residential and light commercial systems.
My approach centers on understanding the complete system — refrigeration, airflow, controls, electrical behavior, and customer concerns — so every recommendation is based on technical evidence, not assumptions.
Professional Profile
HVAC Technical Portfolio
Active
Hazael J. Rodríguez Valero
HVAC Technician · Diagnostics · Field Service
3+
Years Field Experience
EPA
Universal Certified
NATE
Core Certified
RTW
Ready-To-Work
Service Philosophy
✓Diagnostics before parts replacement
✓Evidence-based recommendations
✓Clear customer communication
Current Focus
Continuing technical growth through NATE Heat Pump study, field diagnostics, and stronger system performance analysis.
✓ 3+ Years Field Experience
✓ EPA Universal Certified
✓ NATE Core Certified
✓ NATE Ready-To-Work
✓ NATE Heat Pump In Progress
✓ Residential & Light Commercial
What I Do
HVAC service with a diagnostic mindset.
A clean, evidence-based approach to identifying comfort issues, system failures, airflow problems, electrical faults, and performance concerns.
Advanced Diagnostics
Systematic troubleshooting for electrical, refrigeration, airflow, heat pump, and control-related HVAC problems.
Preventive Maintenance
Detailed inspections focused on reliability, efficiency, safety, and long-term equipment performance.
Heat Pump Service
Evaluation of heating performance, defrost operation, reversing valves, controls, sensors, and system sequencing.
Airflow & Comfort Issues
Assessment of weak airflow, uneven comfort, filtration, coil condition, duct symptoms, and temperature split concerns.
Electrical Troubleshooting
Diagnosis of low-voltage controls, capacitors, motors, contactors, safeties, boards, and communication issues.
Technical Reporting
Clear documentation of findings, photos, readings, recommendations, and system conditions for customers and management.
Field Notes
Selected work built around real diagnostic thinking.
A visual record of the type of technical work I document: symptoms, readings, observations, photos, and recommendations.
Field Note 02
02
Airflow / Comfort
Airflow Restriction Investigation
A comfort-focused evaluation for weak airflow, uneven temperature, and restricted system performance.
• Filter condition
• Blower operation
• Coil cleanliness
• Duct symptoms
Field Note 03
03
Heat Pump / Controls
Heat Pump Operation Check
A sequence-based check for heat pump systems with heating performance or defrost concerns.
• Reversing valve
• Defrost board
• Outdoor fan
• Auxiliary heat
Field Note 04
04
Maintenance / Documentation
Preventive Maintenance Report
A detailed inspection process designed to identify system condition, reliability risks, and performance concerns.
• Electrical readings
• Drain condition
• Coil condition
• System cleanliness
Certifications
Credentials that support professional field service.
Formal training, refrigerant certification, and ongoing NATE development support my commitment to stronger technical accuracy and professional service.
Refrigeration and Air Conditioning Repair Technician
South Florida Institute of Technology
Official technical training focused on refrigeration, air conditioning repair, system fundamentals, and hands-on HVAC service preparation.
EPA Universal Certified
ESCO Institute
Certified to handle refrigerants across Type I, Type II, Type III, and Universal EPA categories.
NATE Core Certified
NATE
Demonstrates HVAC fundamentals in safety, tools, electrical, comfort systems, and applied service knowledge.
NATE Ready-To-Work
NATE
Entry-level HVAC credential focused on job readiness, basic system knowledge, and professional field expectations.
NATE Heat Pump
NATE
Focused study path covering heat pump operation, diagnostics, defrost control, reversing valves, and heating performance.
Customer Reviews
Real customer feedback from HVAC service calls.
Reviews from customers served through Armstrong Air & Electric and Xelor Air & Heat Corp., highlighting professionalism, communication, technical knowledge, and service quality.
R
Richard Scott
Armstrong Air & Electric
★★★★★
Reasonable price | $100–200“I had a fantastic experience with Armstrong Air & Electric, and I want to especially recognize my technician, Hazael Rodriguez Valero. From start to finish, Hazael was professional, knowledgeable, and incredibly thorough.”
“He took the time to clearly explain what was going on, walked me through my options, and made sure everything was done right—not rushed. His attention to detail and pride in his work really stood out, and it’s rare to find a technician who combines technical skill with such great customer service.”
“Armstrong Air & Electric is lucky to have Hazael on their team. If you’re looking for honest, reliable, top-notch service, I highly recommend this company and ask for Hazael Rodriguez Valero if you can. You won’t be disappointed!!!”
R
Ruth Rutledge
Armstrong Air & Electric
★★★★★
Great price | $100–200“Excellent technical and customer service by Hazael. He definitely exceeded my expectations by taking the time to describe to me everything that he was doing and everything that I needed to do to maintain my HVAC system properly. He even checked all the settings on my thermostat to make sure they were optimized. I didn’t feel like he was just in a rush to get finished and get out of here—he really took the time to answer all of my questions which is unusual nowadays. And this was at the end of his day (6 pm)! I would highly recommend Armstrong’s services and I will be keeping them on speed dial If I ever need repairs or installation services.”
M
Melissa Wolfe
Xelor Air & Heat Corp.
★★★★★
Customer Review“Xelor Air & Heat has always provided extremely courteous and timely service. Adel and Hazael are experts and go the extra mile to do a thorough, excellent job. Highly recommend.”
C
Cindy B
Armstrong Air & Electric
★★★★★
Local Guide“I have always had a great experience with Tami from scheduling. Today Hazeal did our service and he was professional, knowledgeable and explained everything as he went along. The arrival time was between 330 and 730 but our tech arrived at 230 which was good. They usually are ahead of schedule so keep that in mind when setting your appointment.”
A
Angela Tsopelas
Armstrong Air & Electric
★★★★★
Great price | $200–300“Hazael was awesome! Explained everything included in the maintenance plan, made a few configuration changes for better performance and efficiency. Recommended things to do in the future to prolong the life of our dehumidifier and air conditioning units.”
P
Patrick O'Brien
Armstrong Air & Electric
★★★★★
Reasonable price | $200–300“Hazael Rodriguez was our technician and he was exceptional. Very prompt, thorough, and patient. Everything was carefully explained to us upon completion of the work.”
J
Jen C
Armstrong Air & Electric
★★★★★
Local Guide“Just wanted to take the time to recognize the amazing work that Hazael Rodriguez did in our house. From the initial interaction he was very informative, professional and very knowledgeable. He was able to take care of the issue we had and offered ways to help prevent it in the future. Because of the phenomenal work Hazael did, we trust his expertise and took his advise to purchase an annual maintenance plan!”
L
Lester Beadle
Armstrong Air & Electric
★★★★★
Customer Review“During the fl. Freeze I heard a strange noise from the condenser. Armstrong sent out Hazael to check things out. I can tell you, the next day appointment is very unheard of in the state of fl. And was very appreciated. Hazael was very friendly and knowledgeable. He insured me that everything was working fine and that the noise was from switching the unit to heat mode. What a relief! I truly believe that Hazael is a valuable employee and will only enhance the Armstrong air & electric name.”
N
Nick gutierrez
Armstrong Air & Electric
★★★★★
Great price | $1–100“Hazael did a fantastic job and was more then great”
Career Timeline
A technical path built through training, field experience, and teamwork.
A concise view of my HVAC growth from formal technical training to field service, customer trust, team development, and current certification progress.
2023
South Florida Institute of Technology
HVAC Technical Training
Started formal HVAC studies and completed technical preparation in refrigeration and air conditioning repair, building the foundation for field service, safety, system operation, and customer-facing HVAC work.
2023–2024
Xelor Air & Heat Corp.
Early Field Service Experience
Developed early hands-on experience in Miami through residential HVAC service, maintenance, customer communication, and the first customer reviews that helped shape my service mindset.
2024–Present
Armstrong Air & Electric
Residential & Light Commercial Field Service
Continued growth in residential and light commercial field service with emphasis on diagnostics, technical reporting, customer trust, teamwork, and long-term professional development within the company.
Current
Professional Development
NATE Core Certified / Heat Pump Path
Strengthening professional credentials through NATE Core certification, NATE Ready-To-Work, and continued Heat Pump specialization focused on stronger diagnostic performance.
About Me
Built through real field experience.
I started my HVAC path through formal technical training and developed my field experience through residential and light commercial service, diagnostics, maintenance, and system performance evaluation.
Since joining Armstrong Air & Electric, I have continued building strong technical habits, close working relationships with my team, and a deeper commitment to customer trust, communication, and service quality.
This portfolio documents my technical growth, field experience, diagnostic process, customer feedback, athletic discipline, and long-term development within the HVAC industry.
Athletic Background
Precision started before HVAC.
2018 Summer Youth Olympic Games Participant
Before building my path in HVAC, sports played an important role in shaping my mindset. My background in archery helped me develop discipline, patience, focus, and respect for precision.
That athletic path reached an international competitive level through participation in the 2018 Summer Youth Olympic Games, reinforcing the discipline, precision, and focus that continue to shape my work today.
Archery
Discipline · Focus · Precision
🎯
Swipe to view archery photos
Precision
Archery taught me to focus on details, alignment, control, and repeatable execution — the same mindset I bring into diagnostics.
Discipline
Consistent progress in sports requires patience, repetition, and accountability. Those habits continue to shape how I approach technical growth.
Focus Under Pressure
Archery requires calm decision-making and mental control. In HVAC, that translates into staying composed during difficult troubleshooting.
Continuous Improvement
My athletic background helped build a mindset of practice, feedback, correction, and constant improvement.
Contact
Let’s connect professionally.
For HVAC service opportunities, technical collaboration, or professional inquiries, you can reach me directly by email or phone.