Your cooling system is an undisputed MVP for keeping you comfortable in Mesa, AZ. During the extreme, triple-digit heatwaves and monsoons, it may seem that it runs around the clock to battle the scorching desert air. But even when an AC is under maximum load, it should cycle on and off regularly to prevent the internal motor from overheating. These brief pauses are also important for giving the compressor time to cool down.
What Is the Normal Runtime for Cooling Systems in Mesa and Why?
The average runtime for air conditioners is about 15 to 20 minutes. But during the hottest part of summer, your unit may run for 20 to 30 minutes to combat the relentless desert heat. This longer runtime is completely normal and nothing to worry about. It’s when your system runs over 30 minutes or begins short cycling (turning on and off every 5 to 10 minutes) that you should give us a call for a professional inspection.
What Affects AC Runtime?
Knowing what affects AC runtime can help you know when to call for help. You may be able to recalibrate the thermostat or cover windows with drapes to restore a steady, efficient cooling cycle.
Outdoor Temperature and Heat Intensity
The outdoor temperature and humidity are two of the biggest factors impacting the AC’s runtime. You should expect the system to run longer cycles on hotter days, especially during Mesa’s blistering July afternoons when the temperature climbs into the triple digits.
Home Insulation and Air Sealing Quality
The insulation in your home serves as a thermal blanket. In the summer, it keeps the cold air from the air conditioner inside. When there are gaps and thinning patches, the conditioned air will escape. The AC will work harder and run longer to make up for the air loss. Having the insulation professionally inspected and topped off seals those invisible energy leaks. It also provides the thermal resistance needed to help the AC cycle at a much more efficient pace.
Thermostat Settings and Temperature Preferences
The temperature you set on the thermostat has a direct effect on the AC’s runtime. If you tell the thermostat to keep it at 70°F when it’s 110°F outside, it will have to run virtually nonstop to bridge that massive gap. If you set it to 78°F, this more manageable set point allows the unit to cycle off more frequently and rest.
System Size and Capacity (Load Matching)
The size of the AC must match your home’s unique cooling profile. A setup that’s too small will run continuously without ever being able to fully cool the house. Some rooms may feel much cooler or warmer than others. An AC that’s oversized will have excess cooling capacity, causing it to cycle on and off really fast as it reaches the target temperature too fast. Both sizing extremes waste energy and lead to significant wear and tear on the equipment that causes costly repairs.
Home Size, Layout and Ceiling Height
The size of your home and AC are both key factors, but the ceiling height and layout also influence the system’s runtime. If you have high ceilings in certain areas, the AC may need to run longer to keep those spaces cool. ACs in homes with open floor plans often run longer cycles to properly circulate air through vast, connected spaces. A lot of households with high ceilings or stubborn hot spots choose to go ductless. This type of HVAC lets them cool just the areas that need the most relief.
Sun Exposure and Amount of Direct Sunlight
A home with large windows is excellent for creating maximum curb appeal. However, if those windows sit on the western side of the house, this essentially makes the adjacent interior spaces a greenhouse. During the intense afternoon heat, the AC may stay on for longer to counteract the intense solar heat gain. Adding thermal drapes or curtains to the windows is an effective way to block radiant heat and give your AC a much-needed break.
How to Test AC Runtime?
If you think there’s a problem with your AC’s runtime, you can run a simple test. This will help you see if it’s operating within the normal parameters, short cycling or just working overtime.
- Setting thermostat to 78°F
- Timing one full cooling cycle
- Noting duration of the “off” time
- Repeating test three times
- Calculating the average cycle length
Schedule an AC Inspection Today
After you get done with the test, you’ll know whether to contact a professional. Our technicians here at Axis Air Conditioning have many years of experience resolving AC runtime issues. We’re experts at repairing clogged coils, failing capacitors and leaky ducts.
Scheduling yearly AC maintenance is a smart move for avoiding summer breakdowns. We’ll clean dirty components and calibrate critical sensors to make sure everything runs at optimal efficiency.
Contact Axis Air Conditioning today to book an AC inspection or maintenance in Mesa. We’ll make sure your AC cycles on and off as it should.
