I've Seen It All — And It Makes Me Angry
I'm Omar Jacobo, owner of Frosty's HVAC (TACLA126718E, EPA 608 #2396328). I started this company on January 1, 2018, and in the years since, I've heard hundreds of stories from homeowners across Farmers Branch, Coppell, Irving, Flower Mound, Lewisville, and Grapevine who got taken advantage of by dishonest HVAC companies. It's one of the things that drives me in this business — doing it right, because too many people don't.
Here are the most common HVAC scams in the DFW area and how to protect yourself from every single one.
Scam #1: "You Need a Whole New System" (When You Don't)
This is the big one. A technician comes out for a repair call and within 15 minutes tells you the system is "shot" and needs full replacement — conveniently, they can install a new one this week for $12,000-$18,000.
How it works: The tech either doesn't diagnose the actual problem or exaggerates a minor issue. A failed capacitor ($500 fix) becomes "your compressor is failing." A dirty coil becomes "your system is dangerously inefficient." They create urgency and fear, especially in July when you're desperate for cooling.
How to protect yourself:
- Always get a second opinion on any recommendation over $2,000
- Ask what specifically failed and why it can't be repaired
- Apply the 50% rule: if the repair is less than 50% of replacement cost, repair usually makes sense. Read our full breakdown in how long AC systems last in Texas
- A legitimate tech will explain the repair option AND the replacement option and let you decide
Scam #2: The "Gas and Go" Refrigerant Rip-Off
This one is rampant in DFW and it's technically incompetent at best, fraud at worst. A tech tells you your refrigerant is low, adds a pound or two, charges you $150-$300, and leaves. Three months later, you're low again. They come back, add more, charge again. Rinse and repeat.
Here's what they're not telling you: Your AC system is hermetically sealed. That means the refrigerant circulates in a closed loop — it doesn't "burn off" or "evaporate" over time. If your refrigerant is low, there is a leak. Period. Adding refrigerant without finding and fixing the leak is like putting air in a tire with a nail in it. You'll be back in the shop next month.
The right process: At Frosty's, when we find low refrigerant, we locate the leak first using electronic leak detection or nitrogen pressure testing. Then we repair the leak. Then — and only then — we recharge the system to manufacturer specifications. The total cost for leak repair plus recharge runs $350-$1,000 depending on leak location and severity. Yes, it's more upfront than a quick "top off," but you fix it once and it's done.
Red flag: Any tech who offers to "just add some Freon" without mentioning leak detection is either incompetent or running this scam. Walk away.
Scam #3: The "Free Diagnostic" That Isn't Free
You see the ad: "FREE diagnostic! FREE service call!" So you call, they come out, and then you get a quote for $1,200 for a repair that includes a "diagnostic fee" buried in the line items. Or they tell you the diagnosis is free but the "testing" is $200, the "inspection" is $150, and the "report" is $95.
How it works: The word "free" gets them in the door. Once they're in your home, they upsell. The "free diagnostic" was really just a free trip to your house — the actual diagnosis costs money, they just relabeled it.
What honest pricing looks like: At Frosty's, our diagnostic fee is $85. That covers the full visit — driving to your home, inspecting the system, diagnosing the problem, and giving you a clear flat-rate quote for the repair. If you proceed with the repair, we waive the $85 diagnostic fee entirely. No hidden charges, no surprise fees, no games.
Scam #4: Bait-and-Switch Pricing
"AC repair starting at $49!" You've seen these ads. You call, they quote $49 on the phone, and then the final bill is $600 because the $49 was just the "trip charge" and everything else — parts, labor, refrigerant, disposal — is extra.
The problem with hourly billing: Some companies quote by the hour. "Our rate is $95/hour." Sounds reasonable, right? But then the tech takes 4 hours on a job that should take 1.5 hours. Or they charge for "research time" or "parts sourcing." You have zero control over the final number.
Why flat-rate is better: At Frosty's HVAC, we're a flat-rate company. That means we quote the job, not the hour. If I tell you a capacitor replacement is $500, that's what you pay — whether it takes me 30 minutes or 2 hours. The price doesn't change based on how long the job takes. You know the cost before we start. That's it.
Flat-rate pricing protects you from slow work, padded hours, and surprise charges. It's why every reputable HVAC company in the country is moving to flat-rate.
Scam #5: The Unlicensed "Handyman" HVAC Tech
In Texas, you need a TACLA (Texas Air Conditioning and Refrigeration License) to legally perform HVAC work. But plenty of unlicensed operators advertise on Facebook Marketplace, Craigslist, and Nextdoor — often at prices that seem too good to be true. Because they are.
The risks:
- No license means no insurance. If they damage your system, your home, or themselves — you're liable
- No warranty on parts or labor. When the repair fails in 3 months, they're gone
- No accountability. The Texas Department of Licensing and Regulation (TDLR) can't discipline someone who doesn't have a license to revoke
- Improper refrigerant handling is a federal EPA violation. You could be implicated
- Work done without permits can cause issues when you sell your home
How to verify a TACLA license: Go to the TDLR website (tdlr.texas.gov), click "License Search," and enter the company name or license number. Every legitimate HVAC company will give you their number without hesitation. Ours is TACLA126718E — look it up. If a company won't provide their license number, that tells you everything you need to know.
Scam #6: "Your Refrigerant Is Obsolete — You Need a New System"
If your system uses R-22 (the old Freon), some companies will tell you that it's illegal to use and you must replace immediately. That's not true. R-22 cannot be manufactured or imported anymore, but it's perfectly legal to use existing or reclaimed R-22 in your system. It's just more expensive.
That said, an R-22 system is at least 15 years old, and at some point replacement does make more financial sense. But that's a decision you should make based on the system's condition and repair costs — not because someone scared you into thinking you're breaking the law.
How to Find an Honest HVAC Company
Here's my quick checklist:
- Valid TACLA license you can verify online
- Flat-rate pricing quoted before work begins
- Clear diagnostic fee policy (ours is $85, waived with repair)
- Strong Google reviews from real customers (we have 94 reviews, 4.9 stars)
- Willing to explain repair vs. replace options honestly
- Proper refrigerant protocol: leak-find-fix-recharge, never "gas and go"
- Licensed, insured, and willing to prove it
For a deeper dive on what to look for, read our guide on how to choose an HVAC company in DFW.
If you've been burned before, or you're just tired of wondering whether you're getting an honest answer, call Frosty's at (469) 254-0548. I'll tell you what's wrong, what it costs, and what your options are — no pressure, no games. That's been the deal since 2018, and 94 Google reviewers will tell you the same thing.