Houston is known for its sweltering heat and high humidity, where air conditioning is more than just a luxury—it’s a necessity. The reliance on air conditioning is so deep that even a minor disruption can cause discomfort. But what happens when a summer storm hits, and your AC suddenly stops cooling? It’s a common scenario in Houston, where thunderstorms can roll in with little warning, bringing heavy rain, wind, and even power surges that can impact your air conditioning system. If you find yourself in this situation, don’t panic. There are practical steps you can take to diagnose the problem and, more importantly, prevent it from happening again.
Understanding the Impact of Storms on Your AC
Before diving into the specific steps you should take when your AC stops cooling after a storm, it’s essential to understand how storms can affect your system. Thunderstorms can lead to power outages, voltage fluctuations, debris buildup, and even physical damage to your AC unit. These issues are more common than you might think, especially in a city like Houston, where summer storms can be intense and unpredictable.
Power Surges and Outages
One of the most common issues during a storm is a power surge or outage. A surge occurs when there is a sudden spike in electricity, often due to lightning strikes or downed power lines. This can cause a significant amount of stress on your AC unit, potentially damaging components such as the capacitor, compressor, or circuit board.
Debris and Physical Damage
Strong winds and heavy rain can also cause debris to build up around or inside your outdoor AC unit. Branches, leaves, and other debris can clog the unit, reducing its efficiency or causing it to stop working altogether. Additionally, if the storm is severe enough, physical damage to the unit itself is possible, which could lead to a complete system failure.
Immediate Steps to Take When Your AC Stops Cooling
If you notice that your AC is no longer cooling after a storm, it’s important to take immediate action. Here’s a step-by-step guide to help you troubleshoot the issue and determine whether you can resolve it yourself or if it’s time to call in a professional.
Check Your Thermostat Settings
It may seem obvious, but the first step is to ensure your thermostat is set to the correct temperature and mode. During a storm, power fluctuations can cause your thermostat to reset, reverting to a different mode or temperature setting. Make sure it’s set to “cool” and that the temperature is set lower than the current indoor temperature.
Inspect the Circuit Breaker
Power surges during a storm can trip the circuit breaker connected to your AC unit. Head to your electrical panel and check if the breaker for your air conditioner has been tripped. If it has, flip it back to the “on” position. If it trips again immediately, this could indicate a more serious electrical issue, and you should contact a professional.
Examine the Outdoor Unit
Your AC’s outdoor unit, known as the condenser, is susceptible to damage during a storm. After the storm has passed, safely inspect the unit for any visible signs of damage, such as dents, debris, or displaced components. If you notice anything unusual, it’s best to call a professional HVAC technician to assess the damage.
Clear Away Debris
If debris has accumulated around your outdoor unit, it can block airflow and cause your system to overheat or shut down. Clear away any branches, leaves, or other debris to ensure the unit has proper ventilation. Be careful not to damage the fins on the unit while doing this, as they are delicate and essential for efficient operation.
Listen for Unusual Noises
Turn your AC back on and listen for any unusual noises. Strange sounds like buzzing, grinding, or rattling can indicate internal damage caused by the storm. If you hear anything out of the ordinary, it’s crucial to shut off the system immediately and contact an HVAC professional.
Common AC Issues After a Storm
Even if you follow all the troubleshooting steps, your AC may still struggle to cool your home after a storm. Here are some of the most common issues that can arise and what they might mean for your system.
Refrigerant Leaks
Storms can cause small leaks in the refrigerant lines of your AC unit, especially if there’s been physical damage to the unit. Low refrigerant levels can lead to reduced cooling capacity or even cause your system to stop working altogether. If you suspect a refrigerant leak, it’s important to have a professional HVAC technician inspect your system, as handling refrigerant requires specialized knowledge and tools.
Frozen Coils
If your AC unit has been working overtime, especially during the humid conditions following a storm, the evaporator coils can freeze. This can happen if airflow is restricted, usually due to a dirty air filter or blocked ducts. Frozen coils prevent the system from cooling your home effectively. Turn off your AC to let the coils thaw, replace the air filter if necessary, and then turn the system back on. If the problem persists, it’s time to call a technician.
Electrical Component Failure
As mentioned earlier, power surges during a storm can damage the electrical components of your AC unit. Even if the system seems to be running, damaged components can prevent it from cooling properly. Capacitors, contactors, and circuit boards are particularly vulnerable to surge damage and may need to be replaced.
Clogged Drain Lines
Heavy rain and high humidity can lead to excessive moisture in your AC system. If the drain lines are clogged, this moisture has nowhere to go and can back up into the system, causing it to malfunction. Regular maintenance can help prevent clogged drain lines, but if you notice water pooling around your unit or a musty smell, it’s time to check the lines for blockages.
Preventative Measures to Protect Your AC
While it’s impossible to control the weather, there are several preventative measures you can take to protect your AC unit from storm damage and ensure it continues to operate efficiently.
Install a Surge Protector
One of the best ways to protect your AC unit from power surges is to install a surge protector. These devices can absorb excess voltage during a surge, preventing damage to your system’s electrical components. A whole-house surge protector is ideal, but individual surge protectors for your HVAC system are also effective.
Regular Maintenance
Regular maintenance is key to keeping your AC unit in top shape, especially in a storm-prone area like Houston. Schedule annual maintenance with a professional HVAC technician to inspect, clean, and tune up your system. This includes checking for refrigerant leaks, inspecting electrical components, and cleaning the coils and drain lines.
Secure the Outdoor Unit
If you live in an area prone to high winds, consider securing your outdoor unit to a concrete pad or other stable surface. This can prevent the unit from tipping over or becoming dislodged during a storm. Additionally, trimming back trees and shrubs around the unit can reduce the risk of debris clogging the system.
Invest in a Backup Generator
In areas where power outages are common, investing in a backup generator can be a lifesaver. A generator can keep your AC running during an outage, ensuring your home stays cool and comfortable even when the grid is down.
For AC Services in Houston, TX, Contact McCann Services Today
Dealing with an AC unit that stops cooling after a storm can be stressful, especially in the heat of a Houston summer. While some issues can be resolved with a bit of troubleshooting, others may require the expertise of a professional HVAC technician. At McCann Services, we understand the importance of a reliable air conditioning system, especially in a city as warm as Houston. Our team of experienced technicians is here to help with all your HVAC needs, from routine maintenance to emergency repairs. If your AC has stopped cooling or you’re concerned about storm-related damage, don’t wait—contact McCann Services today. We’ll get your system back up and running in no time, ensuring your home stays cool and comfortable, no matter what the weather brings.