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Summer in Aurora and the surrounding Fox Valley brings plenty of beautiful sunny days, but it also brings those blistering, high-humidity heatwaves where the thermometer pushes past 90°F. When extreme heat hits, keeping your home cool while keeping your energy bills from skyrocketing becomes a major balancing act.
If you have a heat pump—whether it’s a traditional central system or a ductless mini-split—you have an incredibly efficient piece of technology. However, running a heat pump for maximum efficiency during a heatwave requires a slightly different approach than a standard air conditioner.
Here is how to optimize your heat pump settings to stay cool without breaking the bank this summer.
Before we dive into the settings, let's clear up a very common misconception we hear around the Fox River Valley. Many homeowners hear the word "heat" in heat pump and assume the system is only useful when the snow starts falling.
In reality, a heat pump is a two-way comfort system:
If you have a heat pump, you don't need a separate AC unit—you already have a highly advanced one running right now!
When you come home after a long day and the house feels sticky, the temptation is to crank the thermostat down to 65°F in hopes of cooling the rooms faster.
With a heat pump, this doesn't work and actually drives up your utility bills. Heat pumps don't blast cooler air just because you lowered the target temperature; they cool at the same steady pace regardless. Cranking it down just forces the system to run at maximum capacity for much longer, putting unnecessary strain on the compressor.
Most modern heat pump thermostats and mini-split remotes feature an Auto mode. This tells the system to automatically switch between heating and cooling to maintain an exact temperature.
During a Northern Illinois summer heatwave, using Auto mode can confuse the system. If a cool evening breeze drops the indoor temperature slightly below your setpoint, the system might accidentally kick on the heat for a few minutes, wasting energy and fighting against itself when the sun comes back up.
We all know it’s not just the heat in the Fox Valley—it’s the heavy, thick humidity. If your home feels "clammy" even though the temperature reads fine, your heat pump has a secret weapon: Dry Mode (often represented by a water droplet icon on mini-split remotes).
When toggled to Dry Mode, the heat pump drops its fan speed down low. This allows the indoor coils to get very cold, causing moisture in the air to condense on the coils and drain outside much faster than it would during a standard cooling cycle. Removing the moisture makes the air feel significantly cooler without you having to drop the thermostat temperature.
When a heatwave pushes past 95°F, you might notice that your heat pump seems to be running constantly without taking a break.
Don't panic—this is actually by design. Traditional air conditioners cycle on and off aggressively. Heat pumps (especially variable-speed and inverter-driven models) are designed to scale their energy usage up or down seamlessly. It is much more energy-efficient for a heat pump to run continuously at a low, quiet 25% capacity to maintain your comfort than it is to repeatedly start and stop at 100% capacity.
While optimizing your settings will keep your system running smoothly through the worst of the summer heat, extreme weather can expose hidden vulnerabilities. If your heat pump is blowing warm air, making unusual rattling noises, or if your outdoor unit is completely iced over, it's time to call in a professional.
The team at Artlip + Sons has been keeping the Fox Valley comfortable through every seasonal extreme for generations. Whether you need a quick tune-up or some expert guidance on your system, we are here to help. Schedule a service online or give us a call today!
