Frequently Asked Questions
Living in Arizona means battling extreme heat, relentless dust storms, monsoons, and occasional freezing nights. Here are the most frequently asked HVAC questions by homeowners across the Valley—answered clearly to help you stay comfortable year-round.
Why is my air conditioner not cooling my house properly?
Common causes include low refrigerant levels, dirty filters, blocked condenser coils (often from Arizona dust), or a failing compressor. In the intense desert heat, these issues can escalate quickly.
What should I do if my AC stops working in the middle of summer?
First, check your thermostat settings, circuit breakers, and air filter. If those are fine, turn off the unit to prevent damage and call a professional immediately—Arizona summers can reach dangerous temperatures without cooling.
Why is my AC running but not blowing cold air?
This is often due to low refrigerant (a leak), a frozen evaporator coil, or restricted airflow from clogged filters or ducts.
How can I tell if my air conditioner needs repair or replacement?
Signs include frequent breakdowns, rising energy bills, uneven cooling, strange noises, or if the unit is over 10-15 years old (common lifespan in Arizona’s harsh conditions).
Why does my AC unit leak water inside the house?
Usually caused by a clogged condensate drain line, dirty evaporator coils, or low refrigerant leading to freezing and thawing.
How often should I schedule HVAC maintenance in Arizona?
Twice a year is ideal—once in spring for cooling and once in fall for heating. The extreme heat and dust make regular tune-ups essential to prevent breakdowns.
When and how often should I change my air filters?
Every 1-3 months, or more frequently if you have pets or during high-dust monsoon season. Dirty filters reduce efficiency and strain your system.
What SEER rating is best for Arizona’s climate?
A minimum of 16-18 SEER for energy efficiency. Higher SEER units (20+) save significantly on electricity during long cooling seasons.
How can I lower my energy bills in the Arizona heat?
Use programmable thermostats, seal ducts, add insulation, shade windows, and schedule regular maintenance. Upgrading to a high-efficiency unit can cut bills by 20-50%.
What size AC unit do I need for my Arizona home?
Typically 1 ton (12,000 BTU) per 400-600 sq ft, but factors like ceiling height, insulation, windows, and sun exposure matter. A professional load calculation is required for accuracy.
When is it time to replace my air conditioner?
If it’s over 10-12 years old, requires frequent repairs, or uses R-22 refrigerant (phased out). New units are far more efficient in Arizona’s climate.
How much does a new AC unit cost in Arizona?
Between $5,000-$12,000 installed, depending on size, efficiency, and brand. Heat pumps or full systems can be higher.
What is a heat pump, and is it good for Arizona?
Yes! Heat pumps provide both cooling and heating efficiently. They’re ideal for Arizona’s mild winters and can reduce heating costs compared to gas furnaces.
Should I repair or replace my old HVAC system?
If repair costs exceed 50% of a new system or it’s over 10 years old, replacement is usually smarter long-term, especially with Arizona utility rebates.
What rebates or tax credits are available for new HVAC systems in Arizona?
Federal credits up to $2,000 for high-efficiency units, plus local utility rebates from APS or SRP—often $500-$1,200 off energy-efficient installations.
Do I need heating service in Arizona?
Yes—winters can dip below freezing. Heat pumps or gas furnaces need annual checks for safety and efficiency.
How can I improve indoor air quality in my dusty Arizona home?
Upgrade to high-MERV filters, add UV lights, whole-home purifiers, or humidifiers/dehumidifiers. Regular duct cleaning helps with desert dust and allergens.
Why does my thermostat not reach the set temperature?
Could be undersized equipment, poor insulation, duct leaks, or sensor issues—common in older Arizona homes.
What is involved in a professional HVAC tune-up?
Cleaning coils, checking refrigerant, inspecting electrical components, lubricating motors, and testing overall performance.
How long does a typical HVAC system last in Arizona?
Air conditioners: 10-15 years (shorter than average due to constant use). Proper maintenance can extend this.
What is the 2025 refrigerant change, and does my AC need to be replaced? (R-410A phase-out)
Starting January 1, 2025, the EPA bans new HVAC systems using R-410A refrigerant due to its higher global warming potential. New units must use lower-GWP options like R-454B or R-32. If your system is under 10 years old and uses R-410A, you can keep it—repairs and refrigerant will still be available for years—but costs will rise over time. Systems over 10 years old or using banned R-22 should be replaced now to avoid skyrocketing repair bills.
How do Arizona dust storms and monsoons affect my HVAC system?
Hab oobs (dust storms) clog outdoor coils, filters, and ducts with fine desert dust, forcing your system to work harder and increasing breakdowns. Monsoon humidity can cause mold in ducts or frozen coils. Rinse outdoor units after big storms, change filters more often (every 1-2 weeks during monsoon season), and schedule professional duct cleaning.
What are the benefits of a smart thermostat in Arizona?
Smart thermostats like Nest or Ecobee learn your schedule, adjust automatically, and can be controlled via phone—cutting energy use by 10-20% during Arizona’s long cooling season. Many qualify for APS/SRP rebates up to $150.
How often should ducts be cleaned or sealed in Arizona homes?
In dusty Arizona, ducts should be inspected every 3-5 years and cleaned if needed. Leaky or dirty ducts can waste 20-30% of your cooled air and circulate allergens. Sealing ducts improves efficiency and often qualifies for utility rebates.
What are the best HVAC brands for Arizona’s extreme heat?
Top performers include Trane, Carrier, Lennox, and American Standard for durability against heat and dust. Look for high SEER2 (15+ minimum, ideally 18-25+), variable-speed compressors, corrosion-resistant coils, and strong warranties.
Is a ductless mini-split system a good option for Arizona homes?
Yes—especially for room additions, older homes without ducts, or zoned cooling. They’re extremely efficient (often 20-30+ SEER), provide better humidity control, and avoid duct losses common in hot attics.
What warranty should I expect on a new HVAC installation in Arizona?
A quality installation should include at least 10-year parts and compressor coverage, plus 1-2 years labor from the installer. Many Arizona contractors offer extended 10-12 year labor warranties when you register the equipment.
Do you offer 24/7 emergency AC repair in the Mesa/Phoenix area?
Yes! Arizona summers don’t wait—breakdowns often happen at night or on weekends. Comfort Experts provides true 24/7 emergency service with no overtime charges and fast response times.
Contact Comfort Experts Today!
For honest answers, fast service, and expert help with any of these HVAC concerns—especially with the 2025 refrigerant changes coming soon—trust Comfort Experts in Mesa, AZ. Our NATE-certified technicians are here 24/7. Call 480-207-1239 or schedule service online now and stay comfortable all year long!