Donovan Sadowski
Hartford,WI
Summary
Detail-oriented HVAC professional with extensive experience in diagnosing and repairing HVAC systems. Proficient in emergency service response and preventive maintenance, committed to maintaining peak performance and enhancing customer comfort.
Overview
2
2
years of professional experience
1
1
Certification
Work History
HVAC Technician
JB Mechanical
Beaver Dam, Wisconsin
06.2025 - 12.2025
- Diagnosed and repaired faults in HVAC systems, including refrigerant leaks, electrical issues, and mechanical failures.
- Responded to emergency service calls, providing timely repairs to restore comfort for clients.
- Provided thorough post-service reports to clients, detailing work performed and future maintenance recommendations.
- Performed preventive maintenance on HVAC systems to ensure peak performance and energy efficiency.
- Repaired or replaced defective parts in heating and cooling systems.
- Troubleshot and diagnosed issues with HVAC equipment, providing recommendations for remediation.
- Documented all repair work performed on HVAC units according to company standards.
- Inspected electrical wiring of existing HVAC systems to identify potential problems and safety hazards.
- Recovered refrigerant from old HVAC units prior to disposal according to local environmental regulations.
- Completed basic repairs such as changing belts, servicing fans and motors and cleaning coils, strainers and filters to optimize equipment performance.
HVAC Technician
Aire Serv of Oconomowoc
Oconomowoc, Wisconsin
04.2024 - 05.2025
- Executed routine inspections and maintenance on HVAC systems to enhance longevity and performance.
- Collaborated with customers to assess their HVAC needs and provide tailored solutions for optimal comfort.
- Diagnosed faults in HVAC systems and developed effective repair strategies to minimize downtime.
- Provided thorough post-service reports to clients, detailing work performed and future maintenance recommendations.
- Repaired or replaced defective parts such as compressors, motors, fans and other components in heating and cooling systems.
- Installed, repaired and maintained residential HVAC equipment, including furnaces, air conditioners, heat pumps and duct systems.
- Troubleshot and diagnosed issues with HVAC equipment, providing recommendations for remediation.
- Checked pressure readings on gauges connected to the system in order to diagnose any malfunctions.
- Performed emergency repairs on HVAC systems to restore heating and cooling services in critical situations.
Apprentice Plumber
R Plumbing
Watertown, Wisconsin
09.2023 - 03.2024
- Assisted in installing and repairing plumbing systems under the guidance of experienced plumbers.
- Performed basic leak detection tasks, identifying issues for further evaluation by senior plumbers.
- Utilized various hand and power tools to assist in plumbing tasks, ensuring efficiency and safety.
- Maintained cleanliness and organization of tools and work areas, promoting a safe working environment.
- Assisted in inventory management of plumbing supplies, ensuring availability of necessary materials.
- Provided assistance in assembling pipe sections and fittings, gaining hands-on experience in plumbing assembly.
- Assisted journeyman plumbers in performing repairs and maintenance on pipes, fixtures, and other plumbing equipment.
- Installed water heaters according to manufacturer's instructions.
- Connected gas lines to stoves, furnaces, grills following safety protocols.
- Tested and identified pipe leaks with air and water pressure gauges under plumber supervision.
- Assisted with installation of systems, components and construction materials into new and remodeled buildings.
Skills
- Diagnosing HVAC systems
- Repairing HVAC equipment
- Preventive maintenance
- Troubleshooting issues
- Refrigerant recovery
- Customer relationship management
- Emergency service response
Certification
Universal EPA 608 Certification
Timeline
HVAC Technician
JB Mechanical
06.2025 - 12.2025
HVAC Technician
Aire Serv of Oconomowoc
04.2024 - 05.2025
Apprentice Plumber
R Plumbing
09.2023 - 03.2024