Washington HVAC License Requirements
Partly. Washington licenses only electrical work on HVAC equipment through the Washington L&I; other HVAC work has no state license. Anyone who handles refrigerant also needs federal EPA 608 certification.
Partial state license · By BrazeJobs Team · Updated
License tiers
| Apprentice | Electrical trainee |
| Journeyman | Specialty electrician 06A (HVAC/refrigeration) |
| Master | Specialty master |
| Contractor | L&I contractor registration |
Requirements
| Contractor experience | 4,000 (06A) |
| Exam | L&I exam |
| Renewal | 3 years |
| Continuing education | 24 hours (electrical) |
| Local license | Varies by city |
| Board | Washington L&I |
Local licenses in Washington
Seattle
CityRefrigeration contractor license; journey refrigeration mechanic license (Class A/B/C)
Seattle Department of Construction and Inspections
Journey refrigeration mechanic license to install, repair or alter refrigeration or AC equipment, by refrigerant class; contractor license requires an employee with a journey license. Annual renewal.
- Source: seattle.gov · checked November 5, 2026
Federal: EPA 608 certification
| Rule | Federal certification required to service or dispose of refrigerant equipment and to buy refrigerant |
Who: anyone who maintains, services, repairs or disposes of equipment that could release refrigerant (attaching gauges, adding or removing refrigerant). Types: Type I (small appliances), Type II (high- and very high-pressure), Type III (low-pressure), Universal (all types). Expiry: credentials do not expire. Buying refrigerant: sellers may sell only to certified technicians or employers of one, with limited exceptions (e.g. small cans of MVAC refrigerant). EPA does not issue cards; approved certifying organizations do. Universal requires a proctored core exam.
Apprenticeship
| Registering agency | State Apprenticeship Agency (Washington L&I) |
- Source: apprenticeship.gov · checked November 6, 2026
- Source: lni.wa.gov · checked November 6, 2026
Mechanical code
| Code in force | 2021 IMC with state amendments |
State Building Code adopted by SBCC, effective March 15, 2024, with state amendments.
- Source: app.leg.wa.gov · checked November 5, 2026