Why Air Conditioners Fail in the Heat
When the sweltering heat of Iowa hits, your air conditioner is working overtime. One common issue that arises is air conditioner failure, often caused by a failed capacitor. The capacitor is responsible for helping your AC motor start and run smoothly, and during heatwaves, the added strain can cause it to break down.
Poor AC maintenance also plays a significant role in failure. Dirty air filters, low refrigerant levels, and worn-out electrical components can all lead to system breakdowns when your AC is working hardest. Think of it like running a marathon without training your AC can’t handle the heat without regular checkups.
What to Expect During Peak Heat
During the hottest parts of the day, your AC might struggle to keep up with the rising outdoor temperatures. From 3:30 PM to 6:30 PM, when the temperature is at its peak, it’s normal for your AC to have difficulty maintaining a perfect indoor temperature.
In Iowa, most systems are designed to handle temperatures up to 92°F efficiently. However, once the heat index climbs above 100°F, your indoor temperature may rise 2–3 degrees higher than the thermostat setting. This is common, and it should correct itself as outdoor temperatures cool in the evening.
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The Importance of Regular Maintenance
The key to preventing AC failure during a heatwave is regular maintenance. By scheduling an annual service check up before the hot months hit, you can avoid the stress of sudden breakdowns.
During a routine maintenance visit, a technician will check the air filters, refrigerant levels, and electrical connections. They will also inspect the system’s overall performance, ensuring everything is running efficiently, and that no parts are at risk of failure when you need them the most, especially when Iowa heat hits hard and your AC goes down.
What to Do If Your A/C Stops Working During a Heatwave

If your AC stops working in the middle of a heatwave, don’t panic. Here are a few things you can check before you call a professional:
- Thermostat Settings: Make sure the thermostat is set to cool and the batteries aren’t dead.
- Circuit Breaker: Check if a circuit breaker has flipped. Reset it and see if the AC starts up again.
- Air Filter: If the air filter is clogged, it can choke the system, leading to poor performance or failure.
- Outdoor Unit: Ensure the outdoor unit is clear of debris and hasn’t been obstructed by dirt or vegetation.
Is It Really Broken? Or Just Throwing a Little Tantrum?
Sometimes, what appears to be a major failure can just be a small problem. Here’s how you can troubleshoot before calling in a pro:
- Thermostat Setting: Double check the thermostat settings. Is it on “cool”?
- Circuit Breaker: Ensure the breaker hasn’t tripped. Flip it off and back on.
- Air Filter: A clogged filter can restrict airflow and cause your system to overheat.
If everything seems fine and your AC still isn’t working, it’s time to bring in the experts.
Also Check: What Causes an Air Conditioner to Freeze Up & How to Fix It
Why Emergency HVAC Service Matters & Don’t Wait for a Heatwave to Think About Your A/C
Iowa’s weather can be unpredictable, especially during the summer months. When your AC quits, it’s not just uncomfortable it can be dangerous, especially during a heatwave. This is why emergency HVAC service is critical.
The best way to avoid an AC failure during the heat is regular maintenance. A well maintained AC system runs more efficiently, cools better, and has fewer chances of breaking down when you need it most. If financing is a concern, many HVAC companies offer affordable payment plans for maintenance services, ensuring your system stays in top shape without straining your budget.
Don’t wait for the heat to hit. Schedule a preventative maintenance check now to keep your system running smoothly all summer long.




