Your Trusted Professionals for HVAC Servicesin Phoenix, AZ & Surrounding Areas
NATE-certified technicians, transparent pricing, and 24/7 emergency service — because your comfort can't wait. Free quotes, always.
Full-Service HVAC
Our Services
From emergency repairs to complete system replacements and air quality upgrades — we handle everything HVAC with expert care.
Air Conditioning
Fast, reliable AC repair and new system installations. We diagnose problems correctly the first time — saving you time and money in Phoenix heat.
- Same-day service available
- All major brands serviced
- New system installation
Heating
Complete heating solutions including furnace repair, heat pump service, and new heating system installations to keep you warm on cold Arizona nights.
- Furnace repair & tune-up
- Heat pump service
- New heating installation
Indoor Air Quality
Breathe cleaner, healthier air with Aeroseal duct sealing and our advanced air purification systems that eliminate 99.99% of airborne germs and pollutants.
- Aeroseal duct sealing
- UV air purifiers
- HEPA filtration systems
Ductwork
Leaky ducts waste energy and reduce comfort. We repair, replace, and seal ductwork so your system runs at peak efficiency and distributes air evenly.
- Duct leak detection
- Duct repair & replacement
- Aeroseal sealing
Thermostats
Upgrade to a smart thermostat and start saving immediately. We install and configure Nest, Ecobee, and other top brands for maximum comfort and efficiency.
- Smart thermostat installation
- Nest & Ecobee setup
- WiFi remote access
Ductless Heat Pumps
Perfect for room additions, garages, or homes without ductwork. Ductless mini-splits offer precision comfort with high energy efficiency year-round.
- Multi-zone systems
- High-efficiency units
- No ductwork needed
Water Heaters
Hot water when you need it. We install and service traditional tank, tankless, and hybrid water heaters from leading brands with same-day availability.
- Tankless installation
- Traditional tank service
- Hybrid heat pump water heaters
Swamp Coolers
Evaporative coolers are an energy-efficient option for dry Phoenix summers. We install, service, and winterize swamp cooler systems for all home sizes.
- New unit installation
- Seasonal start-up & shutdown
- Pad & pump replacement
Ventilation
Proper ventilation is critical for air quality and building health. We assess, design, and install whole-home ventilation systems that keep your air fresh.
- Whole-home ventilation
- HRV & ERV systems
- Bathroom & kitchen exhaust
The Diamond Difference
Why Choose Diamond AC & Heating?
We've served the Phoenix Valley since 2008 with one promise: treat every customer's home like our own.
Family-Owned & Operated
Founded by a Phoenix family in 2008. When you call Diamond, you're calling neighbors who understand what 115° Arizona heat means to a family without AC.
Honest, Fair Pricing
Upfront quotes, no hidden fees, no surprise charges. You'll know the full cost before we start — and we'll explain every line item.
Expert Skilled Technicians
Every tech holds NATE certification — the industry's gold standard. You get expert diagnostics and craftsmanship, never guesswork.
Flexible Scheduling
We work around your schedule, not ours. Evening and weekend appointments available. Same-day service when your comfort can't wait.
Free Quotes
Get a detailed, no-obligation estimate on any new installation or replacement. No pressure, no commitment — just honest information.
Residential & Commercial
From single-family homes to multi-unit buildings and commercial spaces — we have the licensing, equipment, and experience to handle it all.
100% Satisfaction Guaranteed
We stand behind every job we do. If you're not completely satisfied, we'll make it right — no questions asked, no fine print.
Coverage
Service Areas
We cover the entire Phoenix metropolitan area — from Buckeye to Gold Canyon, Anthem to Casa Grande.
Central
- Phoenix
- Laveen
- Paradise Valley
North Valley
- Anthem
- Carefree
- Oro Valley
- Rio Verde
East Valley
- Apache Junction
- Fountain Hills
- Gilbert
- Gold Canyon
- Queen Creek
- San Tan Valley
West Valley
- Avondale
- Buckeye
- Glendale
- Goodyear
- Litchfield Park
- Peoria
- Sun City
- Sun City West
- Surprise
South Valley
- Casa Grande
Don't see your city? Give us a call — we may still be able to help!
Call to Check Your AreaReal Reviews
What Our Customers Say
"Diamond AC saved us during a 115° day. They had a tech out within the hour, diagnosed the issue, and had us cooling again before dinner. Honest pricing, zero upsell pressure. We're customers for life."
"I've used Diamond for three years. Their maintenance plan is worth every penny — caught a failing capacitor before it became a $2,000 emergency. These guys are the real deal."
"Finally found an HVAC company I can trust! They gave us three bids and explained exactly why they recommended what they did. The new system is incredible — our electric bill dropped 30%."
"Called at 9pm on a Sunday — had a tech at my door by 10:30. Fixed in under an hour. The technician even showed me what went wrong and how to prevent it. Absolutely stellar service."
Our Story
Family Values, Expert Service
Diamond AC & Heating was founded by a Phoenix native who believed HVAC service could be different — honest, transparent, and done right the first time. What started as a one-truck operation has grown into a team of NATE-certified technicians serving the entire Valley, but our values haven't changed.
When you call Diamond, you're not calling a call center. You're calling a family that lives and works right here in the Phoenix area. We know what it means to be without AC in a 115° Arizona summer, and we treat every service call with that urgency.
Our Promise to You
We back every job with a 100% satisfaction guarantee. If you're not happy, we'll make it right. No fine print. No runaround.
- Upfront pricing — you'll know the cost before we start
- NATE-certified technicians on every job
- Manufacturer-authorized warranty service
- Background-checked and drug-tested employees
- Clean, respectful service every time
- Follow-up call within 48 hours of service
Free Estimates
Contact Us Today
Fill out the form and we'll get back to you within 2 hours during business hours. For emergencies, call us directly — we're available 24/7.
Business Hours
- Monday – Friday7:00 AM – 7:00 PM
- Saturday8:00 AM – 5:00 PM
- SundayEmergency Service Only