Try This First: 6 Simple HVAC & Home Maintenance Fixes Before You Call for Service in Arizona
Helping homeowners and small businesses across Tempe, Phoenix, Mesa, Chandler, Gilbert, and Scottsdale keep things running smoothly.
At CMP General Contracting, we love helping our Arizona neighbors keep their homes and businesses comfortable year-round. While our team is always ready to help with repairs, there are a few easy fixes you can try before calling for professional service. These quick checks can sometimes save you both time and money—and give you a better idea of what’s going on.
1) Check the Thermostat Settings
It might sound obvious, but incorrect settings are one of the most common reasons a system won’t turn on or cool properly. Make sure your thermostat is set to “Cool” (or “Heat” in winter), the fan is on “Auto,” and the temperature is set below the current room temperature.
CMP Tip: Replace old thermostat batteries every six months—even smart thermostats can act up with low power.
2) Inspect and Replace Air Filters
Dirty or clogged filters reduce airflow and cause your system to work harder. This not only lowers efficiency but can cause frozen coils and uneven cooling.
CMP Tip: Check filters monthly during Arizona’s dusty seasons and replace them every 1–2 months. A $10 filter swap can prevent a $300 service call.
3) Verify the Power Source
Before assuming the worst, check that your breaker hasn’t tripped. Arizona’s monsoon storms or short power outages can trip HVAC breakers or GFCI outlets.
CMP Tip: If the breaker immediately trips again after resetting, stop there—it may indicate an electrical short that requires professional attention.
4) Clear Debris Around Outdoor Units
Leaves, weeds, or plastic bags blocking your outdoor condenser can restrict airflow and cause your AC to overheat. Keeping at least 2 feet of clearance around the unit helps it “breathe” properly.
CMP Tip: Turn off the system at the disconnect before cleaning. Use a garden hose (low pressure) to gently rinse away dust buildup on fins.
5) Check for Blocked Vents and Returns
Furniture, rugs, or boxes blocking vents can make one room too hot and another too cold. Poor airflow also strains your blower motor.
CMP Tip: Walk through your home or business once a month to make sure all supply and return vents are open and unobstructed.
6) Look for Signs of Water Leaks or Clogged Drain Lines
If you see water near your indoor unit, it might just be a clogged condensate drain line. Over time, algae and dirt build up and block water flow.
CMP Tip: You can safely pour a half cup of vinegar or hot water with mild soap into the drain line once a month to help prevent buildup. If leaking persists, call for service to avoid ceiling or drywall damage.
When It’s Time to Call a Professional
These tips can solve many simple issues, but if your system is still not cooling, making loud noises, or short cycling, it’s time for a licensed technician to inspect it.
- Unusual noises (buzzing, rattling, or grinding)
- Weak or no airflow
- Repeated breaker trips
- Foul smells or burning odor
CMP Tip: It’s always better to catch issues early. Scheduling a preventive tune-up can often uncover small problems before they become major repairs.
Stay Cool, Stay Safe, and Save
Our mission at CMP General Contracting is to help our Arizona community stay informed, safe, and comfortable. Whether it’s a quick checkup or a full system inspection, our team is here when you need us most.
Schedule a Preventive HVAC Tune-Up or call (480) 440-0180
CMP General Contracting • ROC KB2-352581 • CMP HVAC • ROC CR-39 332487 • Tempe, AZ