EPA 609 certification is the Clean Air Act credential for servicing motor vehicle air conditioning (MVAC) — the A/C in motor vehicles.
Anyone who repairs or services an MVAC system for payment or bartering must be trained and certified under Section 609 by an EPA-approved program.
Here is what it covers, who must hold it, and when an HVAC tech needs one.
What does Section 609 cover? (Vehicle A/C)
Section 609 of the Clean Air Act is the certification program for motor vehicle air conditioning (MVAC).
It is a separate program from Section 608, which covers stationary refrigeration and air-conditioning equipment.
The requirement is keyed to payment.
Any person who repairs or services a motor vehicle air conditioning system for consideration — payment or bartering — must be properly trained and certified under Section 609 by an EPA-approved program.
The boundary between the two programs is firm: a 609 certification does not let you work on or buy refrigerant for stationary HVAC/R equipment — that requires EPA 608 certification.
Who needs EPA 609 certification?
The trigger is being paid to service MVAC, not a job title.
Auto mechanics, mobile A/C specialists, fleet and dealership technicians, and HVAC techs whose shops also take vehicle A/C work all need Section 609 certification once they repair or service vehicle A/C for consideration — and bartering counts the same as cash.
The payment trigger leaves do-it-yourselfers outside the certification requirement: a vehicle owner servicing their own A/C without payment is outside it, and EPA's refrigerant sales restriction page says small cans of MVAC refrigerant — 2 lb or less with a self-sealing valve — may still be sold to uncertified DIYers.
That small-can allowance is specific to vehicle refrigerant.
On the same page, EPA states that Section 609-certified technicians cannot buy refrigerant intended for stationary equipment, regardless of container size.
When would an HVAC tech need it?
If your work is stationary — residential split systems, commercial rooftop units, chillers — you do not need Section 609.
EPA 608 is the credential for that work: a 609 certification does not let you service stationary equipment or buy its refrigerant.
The lines blur on equipment that is vehicle-adjacent rather than vehicle.
EPA allows technicians who maintain, service or repair MVAC-like appliances — air conditioning on off-road farm and construction equipment, with 20 lb or less of refrigerant and an open-drive compressor — to hold either 608 Type II certification or Section 609 certification.
If you already hold Type II, that equipment is covered; a 609 card is an alternative, not an addition.
Transport refrigeration is the crossover to be careful with.
EPA's rule defines MVAC-like appliances as those used to cool the driver's or passenger's compartment of off-road vehicles or equipment, and our reading of the definitions is that refrigeration units that cool cargo fall outside the MVAC and MVAC-like categories — so they would fall under Section 608 instead of 609.
That inference is ours, not an EPA statement we found written out, so confirm which credential your employer's reefer work needs before relying on either.
For HVAC techs, then, 609 matters when the work is on vehicles themselves: fleet maintenance, dealership service, or a shop that takes mobile A/C on the side.
If that is the work you want, Section 609 certification is what the rule requires before you can do it paid — browse open HVAC technician jobs to see what employers near you are hiring for.
How to get 609 certified
You get certified by taking a test through an EPA-approved Section 609 program.
EPA's approved list includes ASE, MACS (Mobile Air Climate Systems Association), ESCO Institute, Mainstream Engineering, SkillCat, TEEX, The Training Center, Trade Masters Online, UTI and others; the version of the list our research read was updated June 25, 2026.
The federal rule (40 CFR 82.40) requires each program to give every certified technician individual proof of certification — a certificate, wallet card or display card — carrying a unique number.
Unlike 608, EPA sets no fixed passing score and no closed-book requirement for 609 in 82.40.
Individual programs' prices and course formats were outside our research; ask the program what to expect before you pay.
Once you have it, you keep it.
Section 609 certification has no expiration — EPA only reserves the right to require recertification at some future date — and EPA's AIM Act FAQ answers "No" to whether technicians already certified under Section 608 or 609 need to be re-certified.
This page is career information, not legal advice. Certification requirements and program details change — confirm the current rules with EPA and the program you plan to test with.
Confirm approval before you pay