How to Get an HVAC License in Texas When You're Starting From Zero

The state doesn't hand out contractor licenses to newcomers. Here's the actual ladder you climb.

Laws, licensing requirements, and deadlines vary by state and change over time. This article is general information, not legal or professional advice. Confirm current requirements with your state's licensing board before acting.

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Texas employs 32,070 heating, air conditioning, and refrigeration mechanics, and the state projects that field to grow 17% from 2024 to 2034.^[10] So the demand is real, and the career-change math is tempting. But there's a gate in front of the contractor license that most people don't see until they're standing at it: most applicants need years of qualifying field experience before they can hold one.^[9] If you're coming in cold, your first move isn't a contractor license at all. It's registering as a technician.

The License You're Picturing Isn't the One You Start With

When people say "HVAC license" in Texas, they usually mean the Air Conditioning and Refrigeration Contractor License. That license lets you run jobs, pull the work, and put your name on it. To qualify for it, you need a minimum of 48 months of practical experience under the supervision of a licensed Texas air conditioning and refrigeration contractor, completed within the past 72 months.^[9] Some of that 48-month requirement can come from something other than a straight crew job, and a later section covers the substitutions in full.

Either way, the state is telling you plainly that the contractor license is an endpoint, not an entry point. You have to log real hours, or qualify through an approved substitute, before you can hold your own license. For a career-changer, that reframes the whole question. You're not asking how to get the contractor license this year. You're asking how to legally get on a crew and start the clock.

The Entry Point Nobody Advertises: Technician Registration

This is where you actually begin. To perform HVAC work in Texas, you must either be a licensed contractor or a registered or certified technician working under a licensed contractor.^[10] Technician registration, not certification, is how a newcomer with zero prerequisites gets legally on a job site and starts banking hours.

The barrier here is low by design. The application fee for a new technician registration is $20, non-refundable, under the fee schedule TDLR last revised effective September 1, 2024.^[5]^[6] You must be at least 16 years old to apply, and there's no experience prerequisite at all.^[5] The registration is valid for one year from the date it's issued.^[5] Plan for the criminal history background check, which can take anywhere from one to six weeks to complete, so don't expect a same-week turnaround.^[5]

Registration alone doesn't shorten your later contractor timeline. What does is a separate, later step covered next: Certified Technician status, with its own fee and its own prerequisite.

From Registered to Certified: A Separate, Optional Step

Registered Technician and Certified Technician are not the same status, and TDLR prices and gates them differently. Registered Technician is the $20, no-prerequisite entry point covered above. Certified Technician costs $50 to apply for, requires you to be at least 18, and you cannot apply for it until you already have either 24 months of ACR-related work experience under a licensed contractor, or completion of a TDLR-approved training program of 2,000 combined instruction and practical hours.^[11] Certification is not something day-one registration earns you automatically. It's a second, later application with its own experience or training prerequisite.

The 2,000-hour training-program route matters most for a true zero-experience reader, since it doesn't require you to already be working under a contractor first. TDLR is explicit that not every program calling itself a "certification program" is actually TDLR-approved, so verify a program's approval status before you pay for it or enroll.^[11]

Here's why Certified Technician is worth pursuing even though it isn't required: hold it for at least 12 months, with 36 months of qualifying experience behind you, and the contractor license's supervised-experience requirement drops from 48 months to 36.^[8]^[9] Laid out this way, the progression looks like this: Registered Technician on day one, then qualifying experience or approved training, then Certified Technician as an optional but strategic step, then the contractor license itself.

You're also not limited to a straight crew job to build that qualifying experience. TDLR credits several substitutes toward the 48-month contractor requirement: a four-year ACR or mechanical-engineering degree credits 24 months, a two-year ACR-focused associate's degree or diploma credits 12 months, a one-year ACR certification program credits 6 months, and every 2,000 hours of qualifying apprenticeship on-the-job training credits 12 months. Military experience of at least 24 months in a relevant occupational specialty, and a handful of government and industrial employment categories, can satisfy the entire 48-month requirement outright.^[13]

What the License Actually Lets You Do: Class A vs. Class B

When you do reach the contractor stage, Texas splits it into two classes, and the difference is equipment size. A Class A license allows work on any size or capacity of air conditioning and refrigeration equipment.^[9]^[10] A Class B license limits you to cooling systems no larger than 25 tons and heating systems no larger than 1.5 million BTUs per hour.^[7]^[8]^[9] Class A is the unrestricted one. Class B covers most residential and light commercial work but caps out below the big commercial systems.

License class isn't the whole picture. When you apply, TDLR also has you select an endorsement, Environmental Air Conditioning or Commercial Refrigeration, and that endorsement governs the type of ACR work you're authorized to do, separate from the class that governs equipment size.^[3]

The class you choose also changes what insurance you carry. A Class A license requires $300,000 per occurrence for property damage and bodily injury, plus $600,000 aggregate and $300,000 aggregate for products and completed operations. A Class B license requires $100,000 per occurrence, plus $200,000 aggregate and $100,000 aggregate for products and completed operations.^[9]^[14] That's a real cost difference to weigh before you decide which exam to sit for.

Speaking of the exam: you have to submit an application before you're even eligible to take it.^[3] TDLR's own exam page defers to PSI's published Candidate Information Bulletin for the exact format, and per the current bulletin, the Environmental Air Class A exam is 120 scored items with a 230-minute limit, and the Class B exam is 100 scored items with a 170-minute limit, both requiring a 70% passing score.^[15] If you fail, you can schedule a retake with PSI within 24 to 48 hours of the failed exam, and you can keep retaking the written exam until your application expires, which happens one year from the date you submitted it.^[3]

What to Do

Start by registering as a technician and getting hired onto a crew run by a licensed Texas ACR contractor. The $20 application and the one-to-six-week background check are the whole cost of entry, so file early and line up the supervised work while it processes.^[5]^[6] Then treat those months as the asset they are: you need 48 of them within a 72-month window, unless you qualify for one of the substitutes covered above, or 36 if you hold Certified Technician status for at least a year first. Getting certified, once you've met its own separate prerequisite, is the single decision that shortens the timeline most for most people.^[8]^[9]^[11]

While you're logging hours, decide which contractor class and endorsement fit the work you want. If you never plan to touch systems above 25 tons, Class B and its lower insurance minimums may be enough. If you want the commercial ceiling gone, plan for Class A instead.^[9]^[14] When you're eligible, submit the contractor application, which carries a non-refundable $115 fee, then schedule your exam.^[12]^[6]

Budget realistically for the back half. Industry guides put the contractor application-to-issuance process at roughly four to six weeks once you apply.^[7] One planning note: TDLR's online applications tied to its TULIP system, including its online app portals, are currently unavailable due to scheduled maintenance as of this writing, so confirm the current filing method before you count on submitting online.^[1]^[3] And know that the rules underneath the license changed recently. Effective September 1, 2026, TDLR updated the codes adopted by reference to the 2024 editions of the International Residential Code, International Mechanical Code, International Fuel Gas Code, and Uniform Mechanical Code.^[2] Study against current material, not last year's.

Bottom Line

Texas has more than 31,000 licensed HVAC contractors, but not every one of them logged supervised crew hours the way this article describes. TDLR also runs reciprocal licensing agreements with states including South Carolina and Georgia, and grants experience exemptions for qualifying degrees, apprenticeship hours, and military service, so some contractors reached the license by one of those other routes.^[4]^[7]^[13] If you're starting from zero with none of those shortcuts, the path begins with technician registration and qualifying ACR experience, not a contractor application filed on day one. Register as a technician first, build or substitute your way to qualifying experience, get certified once you meet its prerequisite to cut a year off your requirement, and treat the contractor license as the finish line it's built to be.

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