Sean Gresin, HVAC Technician at Sun State HVAC

About Sun State HVAC – Phoenix AZ

Rob Simone, HVAC technician with service van in background
 

(Background music plays: Pleasant and uplifting but not loud)

0:00 – Do you have a heating, ventilation, or air conditioning problem and need it fixed as soon as possible? Has it been a long time since you last maintained the HVAC system in your home or office?

0:15 – Finding the right HVAC contractor can sometimes be hard. You need to make sure they have the knowledge, skill, and experience to provide you with complete repair and maintenance services.

0:25 – That’s why we’re here to help. With a highly trained, licensed and insured team technicians, we’re proud to offer the best services in the field from sales and installations to repair and maintenance.

0:38 – We take each project with care and, we put the focus on open communication and getting the job done right the first time.

0:45– Maintaining the ventilation, air and heating systems in your home or office is the key to the longevity to your unit and effective energy savings.

0:54 – So don’t risk your money on an inefficient HVAC system.

0:57(Screen changes to a light yellow background with the Sun State HVAC (happy sun face) mascot and promotional message) Take 10% off when you call in today for AC repair or service.
 HVAC – Call Now! (602)867-9480

0:57 – Call US! Today…

Screen pop-up remains until 1:08

"Where Honesty Rules!"

- Quality of Being Honest
- Honor - Integrity
- Uprightness - Fairness
- Free from Deceit or Fraud
- Implies a Refusal to Lie

The Little Company with the Big Name

- Air Conditioning
- Heat Pump - Repair or Replace
- Furnace - Repair or Replace
- Air Quality Control

- No Contract Maintenance Services

The Smart Choice

- Honest
- Reliable
- Trustworthy
- Family
- Phoenix Natives!

How it All Started

A Word to the Wise

Comfort Specialists Who Care

Hello dear friends — my name is Mark Gresin. I was born and raised in Phoenix, Arizona, in 1950. I founded Sun State HVAC, a trusted HVAC company in Phoenix, AZ in 1979. Here’s a brief look at how it all began.

Growing up, I was a hands-on, curious kid obsessed with fixing things. After serving honorably in the Air Force during the Vietnam era, I returned home and worked in my parents’ restaurant — Gross’ Delicatessen — a well-known establishment here in Phoenix.

That experience taught me two things: the importance of service, and how hard it was to find an HVAC company that understood the needs of restaurants — clean, precise, respectful, and reliable. That gap inspired me to start Sun State HVAC, dedicated to serving both residential HVAC and commercial customers with integrity.

Built on Family, Grown on Integrity

My wife Dorena brought her incredible experience in office management and customer service to help build this business. Together we raised our son, Sean Gresin, who later joined the team and now helps lead Sun State HVAC into the next generation.

As a family-owned HVAC company in Phoenix, We’ve stayed intentionally small — not because we couldn’t grow, but because we choose to stay close to our customers, honest in our pricing, and focused on the craft, not the sale.

Be careful who you trust. Many big-name HVAC repair companies in Phoenix spend tens of thousands on advertising — and guess who ends up paying for that? You do. From jingles to flashy logos, those costs get passed right onto your bill.

These companies often use high-pressure tactics, upsell things you don’t need, and send out jack-of-all-trades who aren’t HVAC specialists. That’s exactly why we became the first HVAC company in Phoenix to offer free second opinions — because more often than not, your system just needs some honest TLC from someone who knows what they’re doing, not someone reading from a script.

At Sun State HVAC, we believe trust should be earned — not bought with gimmicks. That’s why we keep our pricing fair, our recommendations honest, and our marketing low-key. We don’t need to shout from billboards to prove our value — our work speaks for itself.

We Care About Our Customers

We take the time to explain every option, answer your questions directly, and make sure you understand what’s actually going on with your system. We treat your home like it’s our own — with care, respect, and attention to detail. We’ll show you what we see, walk you through the pros and cons, and never push you into a decision you’re not comfortable with. And if we don’t think you need a new air conditioner system, we’ll tell you straight. That’s what makes us different — and why so many customers keep coming back.

We’re not salespeople — and we don’t hire them either. We’re trained, experienced, seasoned HVAC specialists in Phoenix. We make AC systems purr like kittens and heating systems run like clockwork. Whether it’s a strange noise, weak airflow, or rising bills — we can fix it.

Remember: your system might not be broken — it might just need someone who knows how to treat it right.

To us, it’s not just about air conditioning repair — it’s about restoring comfort, peace of mind, and trust. We show up on time, clean up when we’re done, and explain exactly what we’re doing so you’re never left guessing. That’s how we’ve done it since 1979 — and it’s how we’ll keep doing it for years to come.

Real People. Real Technicians. No Sales Reps. Just a trusted HVAC company that cares.

Why Experience Still Matters

Even with all the new tools, tech, and trends, nothing beats decades of hands-on HVAC experience. At Sun State HVAC, we don’t guess — we diagnose. Our team knows what to look for, what to avoid, and how to fix problems the right way, the first time. We’ve seen every kind of system and solved every kind of issue. That kind of real-world knowledge is rare today — and it’s what keeps our customers coming back, along with their friends, family, and neighbors who hear about Sun State HVAC and want the same level of care and honesty.

About Us Contact Details


🕒 Hours: Monday–Friday, 8AM to 5PM

Serving Phoenix, Scottsdale, Glendale, and other Service Areas.

AC, HVAC, Refrigeration
100% Expert Service, 100% of the Time.
We’re Experts At It!

AC, HVAC, Refrigeration

100% Expert Service
100% of the Time
We’re Experts At It!

Meet The Team…

Meet The Team…

That makes Sun State HVAC the most trusted name in
honest air conditioning service in Phoenix

That makes Sun State HVAC the most trusted name in honest air conditioning service in Phoenix

sean-gresin-technician
Sean Gresin
Owner/Partner/Tech
mark-gresin-sun-state-hvac-founder-and-senior-tech
Mark Gresin
Founder
madison-office-scheduler-sunstatehvac
Maddison
Office – Phone – Scheduling Good Cook Too!
dorena-office-payroll-books-manager-owner
Dorena Gresin
Office Manager
robert-simone-hvac-repair-services-technician
Rob Simone
Lead Tech
steve-hvac-repair-services-steve-residential-tech
Steven Ward
Lead Tech

Real People.
Real Technicians.
No Sales Reps.

sean-gresin-technician
Sean Gresin
Owner/Partner/Tech
mark-gresin-sun-state-hvac-founder-and-senior-tech
Mark Gresin
Founder
madison-office-scheduler-sunstatehvac
Maddison
Office – Phone – Scheduling Good Cook Too!
dorena-office-payroll-books-manager-owner
Dorena Gresin
Office Manager
robert-simone-hvac-repair-services-technician
Rob Simone
Lead Tech
steve-hvac-repair-services-steve-residential-tech
Steven Ward
Lead Tech

Real People. Real Technicians. No Sales Reps.

For General Inquiries

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