HVAC scams to avoid: cheap specials, fake mold and pressure sales

Updated November 10, 2026 · KeystoneProGuide editorial team

What do HVAC scams look like in Pennsylvania?

The clearest recent example comes from the state itself. In May 2026 the Pennsylvania Attorney General announced that an HVAC company and two of its employees had agreed to pay the Commonwealth $300,000 and change their business practices, settling a lawsuit filed in June 2022 over deceptive and high-pressure sales tactics. The office's release describes a customer, aged 90, who called about an advertised cleaning special for his heating and cooling unit. The company removed the unit, saying it contained mold, and he signed a contract for a new one costing about $29,000.

The release notes that a settlement is not an admission that the law was broken. What it does show is the pattern the state was concerned about, because the settlement spells out what the company may no longer do:

• knowingly recommend goods or services the customer does not need;
• call something in a customer's home mold without confirming it by laboratory testing;
• provide goods or services before giving upfront prices and getting the customer's written consent.

Each of those is a useful test to apply to any HVAC visit.

How does a cheap special turn into a big bill?

In the Attorney General's case, the opening was an advertised cleaning special. A low price for a visit is not proof of anything by itself, but it is worth deciding in advance how you will handle a sudden, expensive finding. Three habits help:

1. Ask for the diagnosis in writing before any work. It should name the failed part and the price to fix it. The settlement above required upfront prices and written consent; you can insist on the same from anyone.
2. Ask to see the problem. A cracked heat exchanger, a leaking coil or "mold" should be something the technician can show you, with a photograph you can keep. Under the settlement, calling something mold required laboratory confirmation.
3. Get a second opinion on anything large. The Federal Trade Commission advises getting multiple estimates and asking for an explanation when they differ widely.

What warning signs does the FTC list?

The FTC's home improvement scam advice is general, not specific to HVAC, but every item applies:

• The contractor knocks on your door because they are "in the area".
• They have materials left over from another job.
• They pressure you for an immediate decision.
• They want full payment up front, or cash only.
• They ask you to get the required building permits.
• They suggest you borrow from a lender they know.

The pressure point matters most with heating, because a furnace that fails in January creates its own urgency. Even in an emergency, Pennsylvania's construction code allows the permit application to follow an emergency replacement, so a legitimate contractor can still give you a written price first.

Which claims should make you suspicious?

• "You qualify for a federal tax credit." ENERGY STAR says the federal tax credits for efficient furnaces, boilers, air conditioners and heat pumps were available through December 31, 2025. A quote that subtracts one from the price for work done now needs explaining.
• "Your warranty is about to expire." The FTC says unsolicited calls selling extended warranties and service contracts are probably illegal if you have no connection with the caller, and warns that the company behind the contract may not be in business when you need it. You can also put your number on Pennsylvania's Do Not Call list online or at 1-888-777-3406.
• "Bigger is better." ENERGY STAR says a system should be sized from the home's actual characteristics and that oversized equipment may cycle too often and wear out sooner. A replacement quoted larger than the old unit, with no calculation behind it, is a reason to ask questions.
• "Your system just needs more refrigerant." ENERGY STAR says too much or too little refrigerant makes a system less efficient, so the charge matters. But if a system needs topping up again and again, ask why it is losing refrigerant and what a repair would cost. Only a technician with EPA Section 608 certification may add it.
• "You have to use us to keep your warranty." The FTC says federal law bars a manufacturer from requiring specific parts or services to keep warranty coverage unless it supplies them free or has an FTC waiver. Read the warranty yourself; the law says it must be available to read before you buy.

What rights do you have after signing?

For home improvement contracts over $500, Pennsylvania law requires a written, signed contract with the total price, approximate dates and notice of your right to cancel. The Attorney General reported in May 2026 that the state Supreme Court had upheld your right to cancel within three business days of signing by any means, including by phone, as long as the contractor actually receives the notice. If the contract leaves out the cancellation notice, the office says it may be voidable even after three days.

Where do you report a problem?

Start with the contractor, in writing; the FTC suggests sending a letter by certified mail with a return receipt. If that fails, the Pennsylvania Attorney General takes consumer complaints online, and an unregistered home improvement contractor can be reported on 1-888-520-6680. Several counties also run their own consumer offices; the county guides say which.

Checking a company before it reaches your door is covered in how to choose an HVAC contractor and what Pennsylvania requires of HVAC contractors. Contractors are listed on the HVAC contractors directory page.

Sources

1. Lehigh Valley HVAC Company to Pay $300K and Revise Business Practices After AG Sunday Lawsuit for Aggressive, Deceptive Sales Practices, Pennsylvania Office of Attorney General
2. How To Avoid a Home Improvement Scam, Federal Trade Commission
3. Extended Warranties and Service Contracts, Federal Trade Commission
4. Warranties, Federal Trade Commission
5. Frequently Asked Questions: Home Improvement Contractor Registration, Pennsylvania Office of Attorney General
6. PA Supreme Court Upholds Consumer Right-to-Cancel Home Improvement Contracts Within Three Days Regardless of Medium, Pennsylvania Office of Attorney General
7. Submit a Complaint, Pennsylvania Office of Attorney General
8. Do Not Call List, Pennsylvania Office of Attorney General
9. Federal Tax Credits for Energy Efficiency, ENERGY STAR
10. Section 608 Technician Certification Requirements, U.S. Environmental Protection Agency
11. HVAC Quality Installation, ENERGY STAR
12. 34 Pa. Code § 403.62. Permit requirements and exemptions., Commonwealth of Pennsylvania (Pennsylvania Code)
13. Home Improvement Contractor Verification, Pennsylvania Office of Attorney General
14. Maintenance Checklist, ENERGY STAR