Summer in Austin hits different. One day you’re enjoying the perfect spring weather, and the next day the temperature jumps to 95 degrees with humidity that makes you feel like you’re swimming through the air. Your air conditioner becomes your best friend during these scorching months, but what happens when it starts acting up?
We’ve all been there. You walk into your house expecting that cool relief, but instead, you’re hit with warm, stuffy air. Your AC is running, making all the right noises, but something just isn’t right. Don’t panic. Most summer AC problems have simple solutions you can try before calling a professional.
At All Year Heating and Cooling, we consistently see the same issues arise every summer in Austin homes. Here’s what usually goes wrong and how you can fix many of these problems yourself.
Why Is My AC Running But Not Cooling the House?
This question keeps us busy all summer long. Your AC sounds like it’s working, but your house feels like an oven. Several things can cause this frustrating problem.
Check Your Air Filter First
A dirty air filter blocks airflow through your system. When air can’t move freely, your AC can’t cool effectively. Think of it like trying to breathe through a pillow – everything becomes harder.
Pull out your air filter and hold it up to the light. If you can’t see through it clearly, replace it immediately. During summer months, you should change your filter every 30 to 60 days. Austin’s dusty conditions and heavy AC use mean filters get dirty faster than in other climates.
Look at Your Thermostat Settings
Sometimes the solution is embarrassingly simple. Check that your thermostat is set to “cool” mode, not “heat” or “auto.” Ensure the temperature setting is set below your current room temperature. If you have a programmable thermostat, verify that the schedule settings are correct.
Inspect Your Outdoor Unit
Head outside and look at your condenser unit. Is it covered in dirt, leaves, or debris? Austin winds can blow all sorts of things into your outdoor unit. Clear away any plants, trash, or objects within two feet of the unit. Use a gentle spray from your water hose to clean dirt off the condenser coils.
Check for Refrigerant Issues
Low refrigerant levels often cause poor cooling performance. You might notice ice forming on the refrigerant lines or hear hissing sounds near the outdoor unit. If you suspect a refrigerant leak, turn off your system and call a professional. Refrigerant requires special handling and equipment to be repaired safely.
What Causes an AC to Freeze Up in Summer?
Frozen AC coils in summer seem backward, but it happens more often than you’d think. When ice builds up on your evaporator coils, your AC can’t remove heat from your home effectively.
Poor Airflow Creates Ice
Restricted airflow is the primary cause of frozen coils. When warm air can’t flow over the evaporator coils properly, the coils get too cold and ice forms. This usually happens because of:
- Dirty air filters are blocking airflow
- Closed or blocked air vents in your home
- Problems with the blower fan
- Dirty evaporator coils
Low Refrigerant Levels
When your system is low on refrigerant, the remaining refrigerant gets much colder than normal. This extreme cold causes ice to form on the coils. You’ll often see ice on the refrigerant lines outside your house, too.
What to Do When Your AC Freezes
If you discover ice on your AC, turn the system off immediately. Let the ice melt completely before turning it back on – this usually takes 2 to 4 hours. While you wait, check and replace your air filter if needed. Make sure all vents in your home are open and unblocked.
If the problem happens again after you restart the system, you likely need professional help to diagnose refrigerant issues or other mechanical problems.
Why Is My Electric Bill So High With AC Use?
Summer electric bills in Austin can be shocking. Your AC typically accounts for 60% to 70% of your summer energy costs. Several factors can make your bills even higher than normal.
Your System Is Working Too Hard
When your AC can’t cool efficiently, it runs longer trying to reach your target temperature. This extra runtime shows up on your electric bill. Common causes include:
- Dirty air filters are forcing the system to work harder
- Refrigerant leaks reduce cooling capacity
- Dirty condenser coils are preventing heat removal
- Air leaks in your ductwork waste cooled air
Thermostat Problems
A malfunctioning thermostat can cause your AC to run when it shouldn’t. Old thermostats sometimes lose calibration and read temperatures incorrectly. Smart thermostats can develop connectivity issues that affect their programming.
Check that your thermostat reads the correct temperature by comparing it to a separate thermometer. If there is a significant difference, your thermostat may need calibration or replacement.
Your Home Is Fighting Against You
Sometimes the problem isn’t your AC – it’s your house. Check for these energy wasters:
- Air leaks around windows and doors
- Poor insulation in your attic
- Windows without proper shades or treatments
- Heat-generating appliances running during peak hours
Common Summer AC Problems You Can Fix Yourself
Clogged Condensate Drain Line
Your AC removes humidity from the air, and that moisture has to go somewhere. It drains through a small line usually located near your indoor unit. When this line gets clogged with algae or debris, water backs up and can damage your system.
Look for standing water around your indoor unit. If you find it, locate the condensate drain line – it’s usually a PVC pipe coming from your indoor unit. You can try clearing minor clogs by pouring a cup of white vinegar down the drain line. For stubborn clogs, use a wet/dry vacuum to suck out the blockage.
Tripped Circuit Breakers
AC units draw a significant amount of power, especially during startup. Sometimes this can trip your circuit breakers. Check your electrical panel for any tripped breakers. If you find one, turn it completely off, then back on. Try running your AC again.
If the breaker trips repeatedly, stop trying and call a professional for assistance. This indicates an electrical problem that needs expert attention.
Dirty Condenser Coils
Austin’s dusty conditions mean your outdoor condenser coils get dirty quickly. Dirty coils can’t release heat effectively, making your system work harder and less efficiently.
Turn off the power to your outdoor unit. Remove any large debris by hand. Use a gentle spray from your water hose to clean the coils, spraying from inside the unit outward. Don’t use high pressure, as this can damage the delicate fins.
When to Call All Year Heating and Cooling
Some AC problems require professional expertise and specialized tools. Call us when you experience:
Electrical Issues
Never attempt electrical repairs yourself. If you smell burning odors, see sparks, or have breakers that keep tripping, turn off your system and call us immediately.
Refrigerant Problems
Refrigerant leaks require EPA-certified technicians to perform safe repairs. We have the proper equipment and training to handle refrigerant issues correctly.
Complex Mechanical Problems
Issues with compressors, motors, or internal components need professional diagnosis and repair. Trying to fix these yourself can cause expensive damage and void your warranty.
System Age and Efficiency Concerns
If your AC is over 10 years old and has frequent problems, it might be time to consider replacement. We can help you determine whether repair or replacement is more financially sensible.
Prevention Tips for Austin Homeowners
Schedule Pre-Summer Maintenance
Have your air conditioner inspected and serviced before the hot weather arrives. We inspect all major components, clean coils, test refrigerant levels, and identify small issues before they escalate into expensive repairs.
Change Filters Regularly
Set a reminder on your phone to check your air filter monthly. Austin’s dusty conditions and heavy summer air conditioning use mean filters require frequent attention.
Keep Your Outdoor Unit Clear
Trim plants and remove debris around your condenser unit regularly. Good airflow around the unit helps it operate efficiently.
Use Your Programmable Thermostat
Set higher temperatures when you’re away from home. Even raising the temperature 2-3 degrees when you’re gone can significantly reduce your energy costs.
Stay Cool This Summer
AC problems in Austin summer heat aren’t just inconvenient – they can be dangerous. Many issues have simple solutions you can try yourself, but don’t hesitate to call professionals when needed.
At All Year Heating and Cooling, we understand how crucial your AC is during Austin summers. Our experienced technicians are ready to help you stay cool and comfortable, whether you need emergency repairs or routine maintenance.
Don’t wait until your AC completely fails on the hottest day of the year. If you’re experiencing any of these issues or would like to schedule preventive maintenance, call us now at (512) 467-2665. Your comfort is our priority, and we’re here to keep your home cool all summer long.