Washington uniquely licenses HVAC technicians as specialty electricians (06A/06B) rather than through a traditional HVAC licensing framework — a distinction that often surprises technicians relocating from other states.
06B (Restricted): 2,000 documented hours under a certified electrician. 06A (Unrestricted): 4,000 documented hours under a certified electrician plus 48 hours of education.
Yes — administered by PSI. 06A exam fee: $75; 06B exam fee: $65. 70% passing score. Retesting allowed after 14 days.
Contact Washington L&I for current CE requirements for electrical specialty licenses
Contact Washington L&I for current reciprocity agreements
Reciprocity agreements can change. Always verify current status directly with Washington State Department of Labor and Industries before relying on reciprocity for licensure.
Washington's classification of HVAC technicians as specialty electricians is unique in the US and can cause significant confusion for technicians licensed in other states. The 06B is a good entry point for technicians with under 4,000 hours, while 06A covers the full scope. Contractors also need a separate electrical contractor license.
EPA 608 Certification — Required in All 50 States
Regardless of Washington's state licensing rules, any technician who purchases, handles, or works with regulated refrigerants must hold EPA Section 608 certification. This is a federal requirement under the Clean Air Act that no state law can waive. EPA 608 Universal (covering Type I, II, and III) is the most versatile credential for most HVAC roles.
Browse EPA 608 Universal jobs in WashingtonWashington L&I administers the 06A and 06B specialty electrician exams through PSI. The 06B (Restricted HVAC/R, up to 240V/120A single phase) exam requires 2,000 documented hours and a $65 exam fee; the 06A (Unrestricted HVAC/R) exam requires 4,000 hours and 48 hours of education with a $75 exam fee. Both require a 70% passing score. Because Washington classifies HVAC technicians as specialty electricians, the exams emphasize electrical safety and Washington State electrical code alongside HVAC fundamentals — a combination unique among US states.
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Last verified: 2026 · Always confirm current requirements with your state licensing board before starting work or submitting an application.
Washington State Department of Labor and Industries (L&I) — Electrical Section
Visit official board websiteApproximate first-attempt pass rate: ~68% first-attempt pass rate for the 06B exam; 06A is slightly lower due to the broader technical scope
