The EPA 608 exam — the certification that legally lets you touch refrigerant — changes on January 1, 2027. The question bank has not been updated in about 30 years. If you are studying now, you are studying for the new test. Here is exactly what is changing, what is not, and who needs to care.
What is changing
- The current question bank expires on January 1, 2027.
- A new 400-question bank takes effect, with 10 different exam versions.
- The new bank adds general-knowledge questions about A2L and A3 refrigerants — R-32, R-454B, R-1234yf, and hydrocarbons like R-290 and R-600a.
What is not changing
- The format is the same: a Core section plus Type I (small appliances), Type II (high-pressure systems), and Type III (low-pressure systems). You take the sections for the certification types you want.
- 25 questions per section, 18 to pass — and sections are scored independently. Failing one does not fail the others.
- It is still closed-book and proctored. No notes, no phone, supervised testing.
- Universal certification still means passing all sections: 100 questions total.
Who this affects
New students and apprentices taking the exam on or after January 1, 2027 — that is most likely you. You will see A2L and A3 questions.
Who it does not affect
Already-certified technicians do not retake the exam. If you have your 608, you keep it — the certification is good for life. Nobody is making working techs go back and re-test on A2Ls through the EPA.
What to study, in order
- Learn the safety classes cold. A1, A2L, A3 — what the letter means, what the number means, and one example refrigerant for each. Guaranteed exam material.
- Memorize the five A2L refrigerants and their GWP values. R-32 (675), R-454B (465), R-454C (~146), R-455A (~146), R-1234yf (under 1). The exam will ask you to match refrigerants to classes and compare GWP numbers.
- Study A2L safety procedures, not just facts. Ignition sources, ventilation, leak detection and mitigation, recovery and charging, cylinder handling. Safety questions are where students lose the most points — and they are the questions that matter most in real life.
- Study the sections in order. Core first (ozone depletion, handling rules — everyone takes it), then the Types. Most new residential techs go for Universal because it keeps every door open.
One optional cert worth knowing
The ESCO Low GWP Refrigerant Safety Certification is voluntary — not federally required, and nobody will fine you for skipping it. But it is online, open-book, 25 multiple-choice questions, 70% to pass, takes about 30–45 minutes, and manufacturers are starting to require documented A2L training. A printable certificate on your resume tells a hiring manager you take the transition seriously.
Study the test you're actually taking
The free guide walks through the 2027 exam change in plain English — the new bank, the new topics, and a 6-step action list to get ahead of it.
Get the free guide →Ready to drill? The $47 Practice Test Bank has 100 original questions written for the new bank — every answer explained. The $17 Cheat Sheet Pack distills every fact worth memorizing onto 8 printable pages.