Why is my Air Conditioner not Working in the Summer

South Texas is known for its sizzling Tex-Mex dishes and its less beloved summer heat. While restaurants such as Ray’s Drive Inn and Blanco Cafe can get you through cravings for Mexican comfort food, you’ll need the help of a knowledgeable air conditioner (AC) repair technician if your AC fails during summer and early fall in San Antonio. Mr. Wilson Heating and Air conditioning is a full-service HVAC repair, sales, and installation company that’s been serving South Texans for over 20 years! When we hear these three questions from our friends and neighbors, we know that we’re dealing with some of the most common AC repair issues in our industry.

Why Is My AC Not Turning On?

Description of the Symptoms

After a few cool days in the spring, you wisely decide to check to see if your AC unit is still operational after months of winter hibernation. As temperatures soar past 80 degrees Fahrenheit, you realize that your AC unit won’t turn on. You don’t have to check whether air is coming out of the registers because the unit won’t start at all. This is a top AC problem that South Texas homeowners face each season so don’t panic.

Potential Problems and Solutions

There are a few reasons why your AC unit will not turn on. The most common reason is an improperly set thermostat or one that doesn’t have sufficient power. Make sure that your thermostat is set to the “cool” position, the temperature is set to below the room’s temperature, and that the batteries in your thermostat are fresh.

Your AC unit can fail when you neglect good preventative maintenance practices. Clogged air filters not only impact indoor air quality, but they can cause AC units to remain inoperable. Replace dirty filters with clean ones every three months. Clogged AC drains often trigger a float switch that prevents AC units from turning on. A full drain pan is an indicator that your unit’s drain is clogged. Call your local AC repair technician to check and clean your unit’s drain line.

Your AC unit needs power to start. Tripped circuit breakers and blown fuses prevent your AC from getting the electricity that it needs to power up and operate. Check your electrical panel and reset your AC circuit to solve this issue. Make sure that your AC unit’s power switch is in the “on” position. Faulty wiring will also prevent electricity from reaching your AC unit. Have your local AC repair technician check your wiring to make sure that electricity is flowing efficiently and safely to your AC system.

Why Does My AC Unit Repeatedly Cycle On and Off?

Description of the Symptoms

Your AC keeps turning on and off repeatedly. You’re concerned that your AC unit will break down completely or cost you more for your monthly power bills. This issue is called short cycling, and there are many potential problems that cause it.

Potential Problems and Solutions

Lack of regular preventative maintenance is a leading cause of short-cycling AC systems. Dirty air filters, condenser units, and evaporators can restrict airflow causing AC units to start and stop abruptly. The solution is to replace dirty filters and keep coils clean. Schedule preventative maintenance HVAC services with your local contractor for a worry-free solution.

Installing an AC unit that’s too big for your home is another common cause of short cycling. When builders install HVAC systems into new homes, they hire experienced technicians who calculate the load for those systems. Calculations are partly based on the home’s square footage, average household energy consumption, and geographical site conditions. Load calculations ensure that new homeowners get enough power for comfortable living. When calculations are off and AC units are too large for the property, the home gets cooled rapidly, and then the system shuts down abruptly.

Since turning on your AC unit consumes more energy than just letting it run, short cycling will raise your utility bills. A short-cycling AC unit also works harder than one that operates correctly. This shortens the life of your AC unit.

3 Why Is My AC So Noisy?

Description of the Symptoms

After months of running your AC during the start of a hot summer season, you hear weird noises coming from your unit. A noisy AC is not only annoying when you need a quiet environment, but it’s a clear sign that there’s an issue with your unit. Different noises indicate different problems when it comes to AC troubleshooting and repairs.

Potential Problems and Solutions

Squealing sounds that come from your AC unit often signal a belt or bearing problem. Banging or clanging noises indicate that something may be wrong with your AC motor. A slapping sound is often a sign that debris is caught in the AC unit’s blower blades. Call an AC repair technician to investigate the source of your AC unit’s noise to prevent more costly damage to it later.


Your home is a haven, and it should be a comfortable one even on the hottest summer days in San Antonio. If it’s not, contact us without delay. Our AC repair technicians will assess your home’s AC issues and make repairs to get your life back to normal. Call us today to set up an appointment and get a service quote.