My AC is Leaking in San Antonio – Common AC Issues Explained to Help You Diagnose Simple Issues

The summer heat in South Texas makes central air conditioning systems work overtime. The more your AC system is used, the more it needs to be serviced and repaired – just Like your car, appliances or any other mechanical item you own. The result is often the need for AC repair in San Antonio and nearby communities performed by Mr Wilson Air’s highly trained and certified technicians.

Before you call us for local San Antonio AC service, read about the three most common air conditioner problems. You might find an easy fix you can handle yourself and save money. If you can’t locate or repair the issue, we’ll be happy to get your AC working properly again. These are suggestions, not recommended if you lack the technical certifications to work with hazardous materials, electricity or require a permit to work on your home’s AC system.

Why is My AC Leaking?

First, it is very normal to see some clear water drainage from pipes or tubes connected to your AC system’s drain. We repair a lot of leaking air conditioners every year. There are two main causes of a leaky AC, and both can be fixed quite easily by a trained and experienced AC repair technician. Attempting to fix the leak yourself might be successful, or it could lead to frustration and more expensive repairs. That leaking water can also be the cause of water damage to your HVAC system and home, and it could cause mold and mildew too. For these reasons, it always makes sense to call an AC professional for a San Antonio leaking AC.

Sometimes homeowners wonder where the water is coming from. One of the main purposes of a central air conditioner is to remove humidity from your home as it cools. Reduced humidity allows the air to feel more comfortable at a higher temperature, so you can set the thermostat higher and reduce your energy costs.

Here is how dehumidification is supposed to work and how the system can fail. Your HVAC system has an indoor coil known as the evaporator coil. Refrigeration circulates through it to remove heat from air passing over the coil. This makes the coil very cold, and the result is that moisture from the warm indoor air condenses on the coil as it cools. When your AC system is working properly, the water collects in a condensate drain pan, enters a drain hose and is carried to a floor drain or to the outside of your home.

As noted, there are two things that can go wrong:

  • A plugged drain hose results when dirt, debris, mold or algae growth causes a clog. The water can’t drain, and eventually it overruns the pan and appears on the floor beneath you or the ceiling above you, depending on where your HVAC system is located.
  • A cracked or corroded drain pan is caused by age and constant contact with water. The result is the same as with a clog, water leaks.

It doesn’t take long for leaking water to cause a mess in your home and begin to damage everything it contacts. We often hear, “my AC is leaking” from customers, so our technicians have a wealth of experience with the issue. We will quickly diagnose the cause, promptly make the repair and have your AC back working as it should to make your home cool and comfortable. That’s important as the heat and humidity climbs in South Texas!

When you call Mr. Wilson Air please be specific as to where it’s leaking, how much liquid is flowing, colors and smells of the liquid.

Why is My AC Making So Much Noise?

Another common question from customers is, “why is my air conditioner so loud?” If you’re not familiar with the workings of a central air conditioner, you might not realize they are large, powerful pieces of equipment that make a lot of noise, typically from 65 to 75 decibels. Older models and single-stage Air conditioners make more noise than today’s well-insulated, high-performance air conditioners. Installing a sound-reducing blanket is a good way to quiet normal but loud noise.

However, if your AC is running louder than it used to or is making strange noises, it’s likely that prompt AC repair or maintenance is needed. Sometimes s quick and easy fix such as lubricating working parts or cleaning away dirt and debris will prevent more costly repairs.
There are many sounds that are not normal AC noises. If any of these develop, turn the air conditioner off at the thermostat or electrical box because running it longer might cause greater damage. Then, call us, and we’ll send out an AC repair technician to assess the problem. When you call, tell us what noise the AC is making such as:


  • Grinding: Fan motors often make terrible grinding or howling sounds as their bearings wear out and require replacing.
  • Rattling: Just as in a car, there is a long list of reasons your AC might rattle. The problem could be something simple like a twig lodged in the unit that is being struck by the fan. A moderately severe issue common when an AC is rattling is that something has come loose. Perhaps the most severe type of rattling occurs when the unit’s compressor is failing and soon won’t work at all.
  • Hissing: If the hissing is coming from either the outside unit, called the condensing unit, or from equipment inside your home, the cause is probably a refrigerant leak. Where the leak has occurred will determine how extensive the repair is. If the hissing noise is coming from the ductwork, it indicates that you’re hearing air move through a small leak. Leaks are a major cause of high energy bills, so it makes sense to have our professionals evaluate the all the ductwork and get those leaks properly closed.
  • Popping: This often is also a ductwork issue. As the ductwork expands with air moving through it or contracts when the system shuts off, it might make a popping noise. Often this is just a nuisance but might indicate a leak or other issue that should be immediately addressed. Call us today, and we’ll find the source of the popping and quiet it.

We diagnose loud and unusual AC noises very often, so contact us today, and let’s find out what’s going on with your air conditioner.

Why is My AC Not Working?

This questions covers a lot of ground. This article and others on our site can help you understand common issues to help you decide if you need to call us or fix a minor issue yourself. At times, the air conditioner won’t even turn on. On other occasions, the AC is running but not making cold air. There are many potential reasons for each issue.

If your AC won’t work at all, try these quick fixes:

  • Make sure the AC circuits in the electrical box and the 240-volt disconnect panel near the outside unit are turned to the “on” position. Resetting a circuit breaker might get the system working, but if the circuit continues to shut off, it will be important to determine and rectify the cause to prevent more serious damage to the unit.
  • Make sure the thermostat is turned to AC or Cool, and set the target temperature a few degrees below the room temperature
  • Check the condensate overflow switch, a device with a float in it designed to shut down the system if there is a clog, a step that will prevent water leaks and damage
  • Change the batteries in the thermostat, if it uses them. If that doesn’t solve the issue, remove the thermostat mounting screws, gently pull the unit off the wall, and check for loose wires. If only one is loose, you can probably reattach it yourself. If multiple wires are loose and you don’t have a wiring diagram for the thermostat, call us to ensure the wiring is done properly and your AC will work as it should.

If the unit runs but isn’t making sufficient cool air, turn the power off and explore the following possible causes:

  • Check the system’s air filter, and replace or clean it if it appears dirty.
  • Check for ice on the indoor coil inside the air handler or furnace. If it is present, melt it by turning on the system fan-only mode without AC. If the coil continues to ice up, an HVAC technician will look for a common cause such as low refrigerant level, improperly working fan, a dirty coil or a dirty filter.
  • Look for clogs in the drain pan or hose or for leaks that might indicate a blockage as described above.
  • Check both indoor and outdoor coils for dirt, debris and yard waste. Clean them or call us to do the work.

If the outside unit seems to be working, but the system isn’t blowing air, the issue might be in the air handler. Common causes are a failed belt and a failed blower motor. Unless you have significant DIY experience, these AC repair issues are best left to a professional.

If you’re not familiar with your AC system and how it works, we’re here to help. An AC repair technician can quickly determine what is causing your air conditioner to work poorly or not work at all. From there, you will receive options for repairs and corresponding estimates.

If your San Antonio AC repair issue is expensive and the unit is old, replacing your air conditioner might be the most cost-effective option. We will be happy to evaluate your options for repair and replacement and provide you with a free, no-obligation estimate. Today’s efficient air conditioners use less energy and cut cooling costs significantly. They also offer superior indoor climate control than older ACs. Call us today, and we’ll respond promptly with AC repair and replacement options customized to meet your needs.