EPA 609 Certification Guide

What Section 609 Requires

The rules live in 40 CFR Part 82, Subpart B. Anyone who repairs or services a motor vehicle air conditioner (MVAC) for consideration must be trained and certified by an EPA-approved program and must use approved refrigerant recovery or recycling equipment (40 CFR 82.34). Consideration means any payment, including cash, credit, goods or services. EPA treats topping off a system as service involving refrigerant.

How to Get Certified

EPA approves independent training and testing programs, including ASE, MACS and ESCO. Under 40 CFR 82.40, approved tests are graded by someone who receives no benefit from the outcome, the candidate's identity is verified, and each certificate carries a unique number. Many programs are open book and online. EPA does not currently require recertification.

Shop Equipment and Records

• Equipment certification: each shop sends a one-time certification to its EPA Regional Office listing the shop's name and address and each machine's manufacturer, model and serial number (40 CFR 82.42).
• Equipment standards: CFC-12 recover/recycle machines meet SAE J1990, HFC-134a recover/recycle/recharge machines made from 2008 meet SAE J2788, 134a recover-only units meet J2810, HFO-1234yf machines meet J2843, and contaminated-refrigerant recovery units meet J2851.
• Records: keep proof of technician certification and, if you send refrigerant off site, the name and address of the facility that received it. Records are kept for three years.

Unique Fittings, Labels and Retrofits

Each MVAC refrigerant has its own service fittings so refrigerants cannot be mixed. HFC-134a uses quick-connect service ports and sky-blue labels; CFC-12 labels are white; HFO-1234yf uses its own SAE J639 ports. Adapters that defeat these fittings are not allowed. EPA does not recognise any refrigerant as a "drop-in". A retrofit means recovering the old refrigerant, fitting the new refrigerant's unique fittings and applying a label showing the technician, the date, the refrigerant, the charge and the lubricant.

Refrigerants and the Climate

EPA lists the global warming potential of CFC-12 at about 10,900 and HFC-134a at 1,430, compared with about 4 for HFO-1234yf and 1 for CO2 (R-744). Under the AIM Act Technology Transitions rule, new light-duty vehicles from model year 2025 must use refrigerants with a GWP below 150. Shops can keep servicing existing 134a systems.

How to Use This Section

Read this guide, then take the EPA 609 practice test. Every question cites the CFR section or EPA page it comes from, and your next test adjusts to your score.

Frequently Asked Questions

Who needs EPA 609 certification?

Anyone who repairs or services a motor vehicle air conditioner for consideration, meaning cash, credit, goods or services, must be certified under Section 609 and use EPA-approved recovery or recycling equipment. Topping off a system counts as service.

Does EPA 609 certification expire?

No. EPA does not currently require Section 609 technicians to recertify, although it encourages training on newer refrigerants such as HFO-1234yf.

Can I buy small cans of R-134a without 609 certification?

Under 40 CFR 82.154(c), sales of non-exempt substitute refrigerants such as HFC-134a are restricted to certified technicians, with an exception for MVAC cans of two pounds or less that have a unique fitting and, if made or imported on or after January 1, 2018, a self-sealing valve. The 82.42 rule separately restricts class I and II refrigerant (such as CFC-12) in containers under 20 lb.

Is EPA 609 the same as EPA 608?

No. Section 609 covers motor vehicle air conditioning. Section 608 covers stationary refrigeration and air conditioning. MVAC-like appliances, such as some farm equipment, can be serviced under either certification.