Question 1

How much does HVAC service cost in Dallas?

Accepted Answer

We work on flat-rate pricing, not hourly guesswork. A standard diagnostic visit is $89 and is credited toward the repair if you proceed. Common jobs sit in predictable bands — a 21-point tune-up from $79, capacitor replacement from $185, full system replacement from $5,400 including permit. You approve the exact figure in writing before we pick up a tool.

Question 2

Are you licensed and insured?

Accepted Answer

Yes. Twin Hills Air & Heat LLC is a licensed air conditioning and refrigeration contractor with the Texas Department of Licensing and Regulation (TACLA #00123456C), and our technicians hold EPA 608 Universal certification for refrigerant handling. We're fully bonded and insured, and we're happy to email the certificates before your appointment.

Question 3

Do you charge extra for nights and weekends?

Accepted Answer

No. Our rate at 9 PM on a Sunday is identical to 10 AM on a Tuesday. Dallas heat doesn't keep business hours, so neither do we — and you shouldn't be penalised for when your system decided to quit. A real technician answers the emergency line, not a call centre.

Question 4

Can you come the same day?

Accepted Answer

In most cases yes. Bookings placed before 12 PM are usually attended the same day, and we hold emergency capacity on every shift. You'll get a text with your technician's name and live ETA once dispatched.

Question 5

What warranty do you provide?

Accepted Answer

All workmanship carries a 2-year warranty, and manufacturer warranties on supplied equipment are registered in your name. New system installations include a 10-year parts warranty. If something we installed misbehaves inside that window, we return at no charge.

Question 6

Should I repair my old system or replace it?

Accepted Answer

Our honest rule of thumb: if the unit is under 10 years old and the repair costs less than a third of a replacement, repair it. Past 12 to 15 years with a major component failure, replacement usually wins on energy savings alone — especially on an older R-22 system where refrigerant alone is now expensive. We give you both numbers in writing and let you decide.

Question 7

Do I need a permit for a new system?

Accepted Answer

Dallas and most surrounding cities require a mechanical permit for equipment replacement, and an inspection afterwards. We pull the permit, schedule the inspection and hand you the paperwork — it's built into the quoted price, never an add-on. Skipping it tends to surface at the worst possible moment: when you sell.

Question 8

How long does a system replacement take?

Accepted Answer

A standard single-system changeout is a one-day job — typically seven to nine hours from arrival to commissioning. We lay floor protection, haul the old equipment away, and walk you through the new thermostat before we leave. The city inspection usually follows within a few business days.

Question 9

Why does my AC freeze up?

Accepted Answer

Almost always one of two things: the system can't breathe, or it's low on refrigerant. A clogged filter, collapsed duct or blocked return starves airflow; a leak drops the pressure and the coil goes below freezing. Running it iced up is how compressors die, so shut it off and call us rather than waiting it out.

Question 10

Why are some rooms hotter than others?

Accepted Answer

Nine times out of ten it isn't the equipment. It's duct leakage into a 150° attic, undersized returns, poor balancing, or a two-storey house on a single zone. We measure airflow at every register and fix the actual cause instead of selling you a bigger unit.

Question 11

How often should I service my system?

Accepted Answer

Twice a year in this climate — cooling in spring, heating in autumn. Dallas systems run harder and longer than almost anywhere else in the country, so annual-only maintenance leaves a lot on the table. Our Comfort Club covers both visits, adds priority scheduling and takes 15% off any repair.

Question 12

Which brands do you service?

Accepted Answer

Every major brand — Carrier, Trane, Lennox, Goodman, Rheem, York, American Standard, Daikin and Bryant among them. Our trucks carry the common failure parts for all of them, which is why most repairs finish on the first visit.

Question 13

What areas do you serve?

Accepted Answer

Dallas and the surrounding suburbs: Lake Highlands, Richardson, Plano, Garland, Rowlett, Mesquite, University Park, Highland Park, Addison, Farmers Branch, Carrollton and Irving. If you're just outside that ring, call us — we often still make it work.

Question 14

Will you protect my home while working?

Accepted Answer

Floor protection, drop sheets and boot covers come out of the truck before the tools do, and we vacuum before we leave. Attic and closet work is contained, and dust from any cutting is captured at source.

Question 15

Do you offer financing?

Accepted Answer

Yes — 0% for 18 months on approved credit for system replacements, plus longer low-rate terms if you need a smaller monthly payment. Approval takes about five minutes and can be done at your kitchen table.

Question 16

Do you provide free estimates?

Accepted Answer

Quotes for planned work — replacements, ductwork, air quality systems — are free. For fault-finding, the $89 diagnostic covers the technician's time to trace the problem properly, and it's credited against the repair if you go ahead.

Question 17

What payment methods do you accept?

Accepted Answer

All major credit cards, debit, ACH transfer and cheque. Larger projects can be staged with milestone payments, and financing is available on replacements over $2,500.

Indoor Air Quality Systems

What's actually involved

Media or HEPA filtration

UV coil purification

Humidifiers

Dehumidification

Return leak sealing

Airflow verified after install

How the job runs

Assessment

Recommendation

Installation

Verification

Questions we get every week

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Ductwork & Airflow

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Ready to book indoor air quality?