There is no shortage of HVAC companies in Houston. Search results, yard signs and trucks on every freeway make the choice look endless, which is exactly why a short routine helps. This guide covers the checks that protect you whichever company you call: the Texas license and how to look it up, what the City of Houston adds on top, insurance, written quotes, permits, warning signs, and your options when a job turns out badly.
A note on who wrote this. Houston Air & Heating runs a no-cost phone number; it does no HVAC work. Its automated assistant takes a few details, then connects you with a single Houston-area company that is locally owned and separate from the line, and that company may pay the line for the referral. Nobody here ranks contractors or vouches for a license or a policy, and other quotes are always your choice. Run every check below on the company the line connects you with, too.
Why size, ads and star counts do not prove quality
People often search for the largest HVAC companies in Houston on the theory that big means safe. Size tells you a company can afford advertising and a fleet. It does not tell you who will be in your attic, how carefully that person measures, or whether the price you are quoted is fair. Small, owner-run shops and large outfits can both do careful work, and both can cut corners.
Ads and sponsored placements work the same way: they show who paid. The useful signals are things you can check yourself. Those are an active state license, a written diagnosis, an itemized quote, a permit where one is required, and plain answers to plain questions. The rest of this page is about checking those.
Look up the license on TDLR, step by step
In Texas the state agency that licenses heating and cooling contractors is the Texas Department of Licensing and Regulation, or TDLR. Here is how to confirm a company's license in a couple of minutes.
- Find the number. Texas rules require it on proposals, invoices and advertising, so check the paperwork and the company's website before asking.
- Go to the TDLR license search on tdlr.texas.gov and choose the air conditioning and refrigeration license type.
- Search the number first. It returns one exact record. A second search on the business or owner name confirms the license is tied to the company whose name is on your quote.
- Read the record. Look at the name, the expiration date and the class. If no active record appears, ask the company why before letting work start.
- Note the class. Class B covers units up to 25 tons of cooling and 1.5 million BTU an hour of heating, far more than a house needs. Class A has no size limit and matters mainly for big commercial equipment.
Verify the license before work begins. Texas requires anyone contracting to do air conditioning, refrigeration or heating work to hold an Air Conditioning and Refrigeration (ACR) Contractor license from the Texas Department of Licensing and Regulation (TDLR). Ask the company for its ACR license number, then confirm it on the TDLR license search (opens in a new tab). The line does not check this for you.
What the Texas credentials mean
- ACR contractor licenseHeld by the person responsible for the company's heating and cooling work. This is the number that belongs on your quote.
- Technicians on the jobAnyone who helps a licensed contractor with air conditioning work must hold a TDLR technician registration or certification, with a narrow exception for qualifying students, and works under a licensed contractor's supervision.
- EPA Section 608 certificationA federal requirement, separate from the state license, for anyone who handles refrigerant.
- EndorsementsA license can carry endorsements such as environmental air conditioning, which covers home comfort systems, or commercial refrigeration.
Texas rules (16 Texas Administrative Code section 75.71) also say where you should see the number without asking. Every proposal and invoice must carry it, along with a statement that TDLR regulates the company. Ads seeking air conditioning work must show it. Each work vehicle must display the company name and number on both doors or sides, in lettering at least two inches tall. A company that has the number nowhere and hesitates when asked is telling you something.
The City of Houston layer: registration and permits
There is no separate city HVAC license, which answers a common search for an "HVAC license Houston." The City adds two other checks for work inside its limits.
License registration
A contractor holding a state air conditioning license must register it with Houston Public Works before working in the city. The registration lasts one year and asks for a copy of the state license card, photo ID and a certificate of insurance showing the licensee's name and license number. Ask the company whether its registration is current.
Permits for the job
The Houston Permitting Center requires a permit to install, repair or replace a condensing unit, and the job is inspected. Contractors apply through the City's iPermits system. The City's Mechanical Section takes questions at 832-394-8850. The inspector is the only outside party who checks the finished work, so a lower price in exchange for no permit costs you that check.
Suburbs such as Pearland, Sugar Land, Katy and League City run their own building departments, and unincorporated parts of Harris and Fort Bend counties follow different rules. Before signing, find out whose permit office the job goes through.
Insurance: ask for the certificate, not the word
TDLR requires licensed air conditioning contractors to carry general liability insurance. Its certificate of insurance form sets minimums of $100,000 for each occurrence and $200,000 in total for Class B. Class A carries triple those amounts, $300,000 and $600,000. Coverage for completed work is part of it.
Saying "insured" on a website proves nothing on its own. A certificate names the insurance carrier, the coverage period and the dollar limits, and a phone call to that carrier tells you whether the policy is still in force. Ask for one before anyone climbs into your attic, cuts a hole in a wall or sets new equipment. This site never claims that any company is insured; checking is up to you.
Compare written quotes line by line
A careful company tells you what failed and what the fix costs before it starts. The table below shows what a complete written quote usually contains, so you can compare two companies on the same terms. For a full replacement, the AC installation quote checklist goes further.
| Item | On a repair quote | On a replacement quote |
|---|---|---|
| The problem | The failed part, named, and how it was confirmed | Why repair no longer makes sense, with a repair price for comparison |
| Parts | Part name or number | Model numbers for outdoor unit, coil or air handler, and furnace |
| Refrigerant | Type and pounds added, plus where the leak is | Refrigerant type and whether the copper lines are new |
| Sizing | Not usually needed | A load calculation (ACCA Manual J), not "same as before" |
| Fees | Diagnostic or trip fee and whether it is credited | Permit, disposal of old equipment, electrical and duct work |
| Warranty | Labor warranty on the repair | Parts and labor warranties, each in years |
| License | TDLR license number and a single total price on the paper | |
Whenever replacement is on the table, ask whether a repair is possible and what it would run. A straight answer with both numbers is one of the clearest signals of how a company works. The repair or replace guide and the AC repair cost guide help you judge the numbers.
Red flags and good signs
A single item below may have an innocent explanation. When several pile up, walk away.
Red flags
- Pressure. A discount that vanishes at the end of the visit, or warnings that a working system is about to fail any day.
- A refrigerant scare. Claims that R-410A is now illegal so you have to buy new. An EPA rule this year lifted the 2026 cutoff for installing older R-410A stock, and fixing an existing R-410A system has always been allowed.
- No license number on the quote, invoice, website or vehicle, and a vague answer when you ask.
- Cash only, with no invoice. If the work fails you have no paper trail.
- A size quoted by phone. No one can size a house without measuring it.
- Repeated refrigerant top-offs with no leak search. Refrigerant circulates in a closed loop and is not consumed, so a low charge points to a leak.
- A bid far below the rest. Usually something is missing, such as the permit, a matching coil or the labor warranty.
Good signs
- The license number on the paper, matching an active TDLR record.
- An insurance certificate sent without fuss.
- Diagnosis before price, with the failed part named in writing.
- A repair option priced beside any replacement.
- A clear answer on the permit and who pulls it.
- A load calculation and model numbers on any new system quote.
- No rush. Room to think, get a second opinion and ask more questions.
Reading reviews, "best of" lists and Reddit threads
Many people search for the best AC repair in Houston or read Houston Reddit threads before calling anyone. Reviews can help if you read them the right way. The Federal Trade Commission suggests checking several sites rather than one, paying attention to how recent the reviews are, and being wary of a burst of reviews posted in a short window. It also notes that fake reviews are not always glowing ones.
- Start with recent reviews. Crews and owners turn over, so this year tells you more than 2019.
- Read the middle ratings. Three and four star reviews often describe what really happened.
- Look for details. A review that names the failed part and the written price is worth ten that just say the tech was nice.
- Check how the company responds. Polite, factual replies to unhappy customers count in its favor.
BBB letter grades cover accredited and non-accredited businesses alike, and a company's complaint record is a major factor. BBB itself cautions that its rating is no promise about how reliably a company will perform, and accredited businesses pay BBB dues. Read the complaints and how they were handled, not just the letter grade.
Before trusting any "best HVAC companies in Houston" list, ask how it makes money. If the businesses on it paid for a spot, for a higher position or for each lead, you are reading advertising, which is fine if it says so. In 2024 the FTC finalized a rule against fake reviews and testimonials that also bars a business from passing off a review site it controls as independent.
This line belongs in the paid group, and that is why every page says so. Companies may pay it a referral fee. The line offers a fast, no-cost route to one local company, day or night. It offers no ranking and makes no claims about that company. Checking its license, insurance and written price stays in your hands.
If something goes wrong
Start with the owner or service manager, with your quote and invoice in hand, and say plainly what you expected and what happened. If that goes nowhere and you think a rule was broken, such as work done without a license, no permit where one was needed, or work below code, TDLR accepts complaints online and by mail. Have the business name, its license number, your documents, photos, texts and a timeline ready. File within two years of the problem. TDLR's process centers on the license and penalties; a settlement can sometimes include restitution or repairs, but if it does not, recovering money may mean a separate claim, such as in a justice of the peace court.
The short version
- Get the TDLR license number and look it up.
- Inside Houston, ask whether the license is registered with the City.
- Ask for a certificate of insurance before work starts.
- Get the diagnosis and the total price in writing.
- Before any replacement, request a repair price too.
- Find out who pulls the permit, and from which office.
- Insist on a load calculation for any new system.
- Take your time when the hurry is coming from a sales pitch rather than from a failed system.
Told that new refrigerant rules leave you no choice but to replace? The free AC guide explains what the rules actually say.
- Dial the numberAn automated assistant picks up (832) 662-4107 at any hour and asks what you need help with.
- Say what is wrongTell it whether the trouble is cooling or heating, where in the Houston area you are, and what the system is doing.
- Reach a local companyYour call is transferred to an independent, locally owned HVAC company, which gets a short summary of your problem before it answers.
- Work it out with themThat company inspects, quotes, repairs and bills you directly. If nobody can pick up, your name, number and problem are passed on for a call back.
About this line: Houston Air & Heating is a free phone line, not an HVAC contractor. It answers your call and connects you with an independent local heating and air conditioning company, which inspects, quotes and does the work, and which you pay directly. Companies may pay a referral fee. You never pay the line. Read how the line works.
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