Burbank summers are notorious for their intensity. When the mercury climbs into the triple digits, your air conditioner isn’t just a luxury—it’s a lifeline. But as you listen to the steady hum of the compressor fighting against the midday sun, a worrying thought might cross your mind: Is this extreme heat slowly destroying my AC unit?
The short answer is that while AC units are built to withstand outdoor elements, prolonged exposure to extreme heat can accelerate wear and tear. It’s not necessarily the temperature itself that breaks the machine, but rather the operational stress caused by the relentless demand for cooling. When the heat wave hits, your system has to work overtime, often without a break, which pushes components to their limits.
However, heat waves don’t have to be a death sentence for your cooling system. Understanding how high temperatures affect your unit is the first step in preventing long-term damage. By knowing the signs of strain and implementing the right maintenance strategies, you can ensure your AC survives the Burbank summer and continues to keep you cool for years to come.
How Extreme Heat Stresses Your AC System
Air conditioners are designed to operate within specific temperature ranges. Most residential units are built to handle up to 115°F efficiently. Burbank occasionally tests these limits, but even when temperatures are within the operational range, the duration of the heat is what matters.
The Problem of Continuous Operation
During a heat wave, your home gains heat faster than usual. To maintain a comfortable indoor temperature, your AC runs for longer cycles. In mild weather, a system might run for 15 minutes and then rest for 15. In a heat wave, it might run for hours continuously.
This lack of downtime prevents the internal components—specifically the compressor and fan motors—from cooling down. Just like a car engine running at high speeds for hours, the internal parts of an AC generate their own heat. If this internal heat cannot dissipate because the ambient outdoor temperature is also high, the risk of overheating increases significantly.
Capacitor Failure
One of the most common casualties of a heat wave is the capacitor. This small electrical component provides the jolt of energy needed to start the compressor and fan motors. Heat is the enemy of electronics. High ambient temperatures combined with the heat generated by the electrical current can cause the fluid inside the capacitor to expand and eventually leak or dry out. When a capacitor fails, your AC might hum but the fan won’t spin, or the compressor won’t kick on, leaving you without cool air when you need it most.
Compressor Strain
The compressor is the heart of your air conditioning system. It pumps refrigerant between the evaporator and condenser coils to facilitate heat exchange. When it’s 105°F outside, the system has to work much harder to reject the heat absorbed from your home into the outside air.
If the coils are dirty or the airflow is restricted, the pressure inside the system rises. High head pressure forces the compressor to work harder, drawing more amperage and generating more heat. Over time, this excessive strain can lead to compressor burnout—a major repair that often necessitates replacing the entire outdoor unit.
The Role of Poor Maintenance
Heat waves act as a stress test for your HVAC system. A well-maintained unit can usually weather the storm without issue. However, if your system has underlying issues, the heat will expose them.
Dirty Coils and Filters
The efficiency of an air conditioner relies on airflow and heat transfer. If your condenser coils (the ones in the outdoor unit) are coated in dust, dirt, or cottonwood seeds, they can’t release heat effectively. It’s like trying to run a marathon while wearing a winter coat.
Similarly, a clogged air filter restricts airflow over the indoor evaporator coil. This forces the system to run longer to achieve the same cooling effect. During a heat wave, these inefficiencies compound, causing the system to run practically non-stop and increasing the likelihood of a breakdown.
Low Refrigerant Levels
If your system has a slow refrigerant leak, it might perform adequately during mild weather. But when the heat load is high, the lack of refrigerant means the system can’t absorb enough heat from your home. The unit will run continuously in a futile attempt to reach the thermostat setting. This not only wastes energy but can cause the evaporator coil to freeze up—ironically, causing the AC to stop working entirely in the middle of a heat wave.
Protective Measures for Burbank Homeowners
You can’t change the weather, but you can change how your AC responds to it. Taking proactive steps can mitigate the risk of long-term damage.
1. Give Your System a Break
It might seem counterintuitive when it’s hot, but try to reduce the load on your AC. Close blinds and curtains during the hottest part of the day to block solar heat gain. Avoid using heat-generating appliances like ovens and dryers until the evening. If possible, raise the thermostat by a few degrees. Setting it to 78°F instead of 72°F can significantly reduce the workload on the compressor.
2. Schedule Pre-Summer Maintenance
The best time to fix an AC problem is before the heat wave arrives. Professional maintenance in the spring ensures that coils are clean, refrigerant levels are correct, and electrical connections are tight. A technician can spot a weak capacitor or a failing motor before it breaks down under the stress of July and August temperatures.
3. Ensure Proper Airflow
Check your outdoor unit and clear away any vegetation, leaves, or debris that might be crowding it. The unit needs at least two feet of clearance on all sides to “breathe.” If the hot air it expels is trapped against the house or recirculated because of an obstruction, the unit will overheat.
4. Change Your Filter
This is the simplest yet most effective maintenance task a homeowner can do. Check your filter monthly during the summer. A fresh filter ensures maximum airflow, helping the system run efficiently and keeping the internal components cooler.
Frequently Asked Questions
Can I spray water on my AC unit to help it cool down?
While some homeowners spray their outdoor condenser coils with a hose to help dissipate heat, this is generally not recommended as a long-term solution. While a gentle mist can help temporarily lower head pressure, hard water can leave mineral deposits on the coils that eventually act as an insulator, reducing efficiency. Furthermore, spraying water on electrical components if the unit isn’t sealed perfectly can be dangerous. It is better to rely on proper airflow and maintenance.
Why does my AC trip the breaker when it’s hot outside?
If your AC trips the circuit breaker during a heat wave, it’s a safety mechanism kicking in. It usually means the compressor is drawing too many amps because it is working too hard or overheating. Do not simply flip the breaker back on repeatedly. This is a sign of a serious issue—likely a dirty coil, a bad capacitor, or a failing compressor—and requires professional attention immediately to avoid permanent damage.
How long should an AC unit last in Burbank?
On average, a central air conditioning unit lasts between 12 to 15 years. However, in hot climates like Burbank where usage is heavy, the lifespan can be on the lower end of that spectrum if the unit isn’t maintained. Regular tune-ups and filter changes are key to extending the life of the system beyond the 15-year mark.
Is it better to leave the AC on all day or turn it off when I leave?
During a heat wave, it is generally better to leave the AC on but set the thermostat higher (e.g., 82°F) when you are away. If you turn the system off completely, the house will heat up significantly. When you return and turn the AC back on, the unit has to work incredibly hard for hours to remove that accumulated heat and humidity, which places immense stress on the components. Maintaining a steady, moderate temperature is easier on the equipment.
Keeping Your Cool for the Long Haul
Heat waves are an unavoidable reality of living in Burbank, but they don’t have to result in expensive AC repairs. The damage caused by extreme heat is rarely instant; it is cumulative. It stems from forcing a neglected system to run a marathon without adequate preparation.
By treating your air conditioner like the essential machine it is—keeping it clean, giving it breaks, and ensuring it is professionally tuned—you can protect it from the punishing summer sun. Don’t wait for the system to fail before paying attention to it. A little preventative care now can save you from a sweaty, uncomfortable, and expensive breakdown later.