NARTA HVAC · Homeowner Guide · NYC
5 red flags of a dishonest HVAC contractor in NYC.
Two pages. No fluff. The exact phrases, missing documents, and missing diagnostics that separate a fair quote from a padded one. If you read this before you sign anything, you’ll save money — and you might not need to call us at all.
1. They quote a price before opening the unit.
An honest technician runs a diagnostic before naming a repair price. If someone walks in and announces a flat replacement number from the doorway, they’re working off a script — not your system. Refrigerant pressure, capacitor health, blower amp draw, and drain condition cannot be assessed from across the room.
What to ask
“What did the diagnostic show, and can I see the readings in writing?”
2. The “urgency” language doesn’t match the symptom.
“This is about to catch fire,” “the compressor could go any minute,” “you have to decide today” — these phrases convert sales, not safety. Real failures have specific evidence: scorched contactors, leaking refrigerant joints, locked-rotor amp readings. If urgency is invoked without evidence, slow down.
What to ask
“What specifically would happen if I waited 72 hours and got a second opinion?”
3. They refuse to itemize the quote.
A line that just says “HVAC repair — $1,850” is not a quote, it’s a number. A legitimate written estimate breaks out parts, labor hours, refrigerant by pound, permit fees if any, and warranty terms. If the estimate fits on a Post-it, it’s engineered to be hard to compare — and that’s the point.
What to ask
“Can I have a line-itemized written quote, with parts, labor, and warranty?”
4. No license number, no Certificate of Insurance.
In NYC, HVAC contractors should carry a DCWP license, and any contractor working in a co-op, condo, or commercial building should be able to produce a $1M–$2M Certificate of Insurance naming the building as additional insured. Asking for both is normal. Refusing to provide them is the answer.
What to ask
“What’s your license number, and can you send a COI naming my building?”
5. The replacement recommendation skips the load calculation.
Sizing a new system without a Manual J load calculation is how homeowners end up with oversized equipment that short-cycles, runs humid, and dies early. A 1-bedroom in a pre-war Brooklyn walkup needs a different ton rating than a 1-bedroom in a glass Long Island City condo. The number doesn’t come from square footage alone.
What to ask
“Have you run a Manual J load calc, and can I see the inputs?”
When you’re ready
Or — let us read someone else’s quote for you.
If you already have a written estimate from another licensed contractor, email it to us. A NARTA technician reviews it line by line and tells you what’s fair, what’s padded, and what’s missing. Free. No appointment. No obligation.