The short answer
To find a trustworthy AC company in Arizona, verify the contractor's AZ ROC license is active, confirm they're insured, read recent reviews for patterns, and watch for high-pressure red flags. RM III is licensed (AZ ROC #332513), insured, BBB A+ accredited (since 2021), and rated 5.0 on HomeAdvisor.
Why does licensing matter so much in Arizona?
HVAC work in Arizona requires a license from the Arizona Registrar of Contractors (AZ ROC). A licensed contractor has met bonding and competency requirements, and the ROC gives you recourse if a job goes wrong. Unlicensed work can void equipment warranties, fail inspection, and leave you with no protection.
Verifying the license is the single most important step — and it takes two minutes.
How do you verify a contractor's license?
Vet any Arizona HVAC company like this:
- 1Ask for their AZ ROC license number, then confirm it's active on the Registrar of Contractors website (azroc.gov). RM III's is AZ ROC #332513.
- 2Confirm they carry liability insurance (and workers' compensation) — ask for proof, not just a 'yes.'
- 3Check that the license classification matches the work (residential HVAC).
- 4Look up the business with the Better Business Bureau — RM III is BBB A+ accredited (since 2021).
Verify, don't take their word
A reputable company will gladly give you its ROC number and proof of insurance. Hesitation or excuses are a red flag — move on.
How do you read reviews critically?
Reviews are useful when you read them for patterns, not just stars:
- Look for recent reviews and a consistent pattern over time, not a burst of five-stars in one week
- Read how the company responds to criticism — professionalism under pressure tells you a lot
- Check more than one source (Google, BBB, HomeAdvisor). RM III holds a 5.0 rating on HomeAdvisor.
- Be skeptical of a company with no verifiable reviews anywhere
What are the red flags to walk away from?
RM III is a family-owned, third-generation company built on a single promise — Excellence with Integrity. We give written estimates, pull permits, verify our work, and never pressure you to decide on the spot.
Walk away if you see:
- No ROC license number, or one that doesn't check out on azroc.gov
- No proof of insurance
- A price quoted without anyone measuring your home or doing a load calculation
- High-pressure 'sign today or lose the discount' tactics
- A promise of a rebate that doesn't exist (for example, an 'APS rebate' in 2026 — APS ended it)
- Cash-only, no written estimate, or no permit pulled for a replacement
Ask for their AZ ROC license number and look it up on the Arizona Registrar of Contractors website (azroc.gov) to confirm it's active and in good standing. RM III's license is AZ ROC #332513. Also confirm liability insurance and workers' compensation before any work begins.
RM III is a licensed (AZ ROC #332513), insured, family-owned, third-generation HVAC company led by owner Raul Mori, with 27 years of hands-on experience. We're BBB A+ accredited (since 2021), rated 5.0 on HomeAdvisor, give written estimates, and offer a free second opinion — no pressure, ever.
Terms in this guide
- AZ ROC license
- An Arizona Registrar of Contractors license — required to legally perform HVAC work in Arizona. RM III AC & Heating holds AZ ROC #332513. Always verify a contractor's ROC number is active before hiring; it's your protection if something goes wrong.
- Manual J load calculation
- The industry-standard method for sizing an HVAC system. A Manual J accounts for your home's square footage, insulation, windows, orientation, and the Phoenix design temperature to calculate the exact cooling and heating load — so the system isn't oversized or undersized.
- APS HVAC rebate (ended)
- Arizona Public Service ended its residential HVAC rebate program effective January 1, 2026. If you're an APS customer, there is no APS AC rebate to claim in 2026 — be wary of any company that promises one. Federal incentives still apply.