San Antonio is listed among the 10 hottest cities in the United States. What if, in this scorching heat, your air conditioner starts blowing warm air instead of rendering a cool breeze? We know it is unbearable, and you might be looking for AC repair in San Antonio quickly.
We have got you covered with the common reasons causing this issue and how to fix it. Read on!
Your AC is blowing warm air because of a faulty thermostat, clogged filters, refrigerant leaks, or a failing capacitor. Additionally, this issue can be attributed to undersized units, a faulty compressor, or duct leaks. The majority of these issues require a professional fix. However, you can easily fix some of them on your own.
Your AC might be blowing warm air owing to the following thermostat-related problems:
Air filters clogged with dirt & debris obstruct air flow to the evaporator coil. A study reveals that clogged filters can decrease air flow by around 50% with energy consumption rising by 15-30%. Restricted airflow further leads to two scenarios:
Low refrigerant levels can negatively impact the cooling ability of your AC. They result mainly from leaks or undercharging at installation. Refrigerant leaks have a profound environmental impact and require safe disposal and proper handling.
As per the US Environmental Protection Agency (EPA), if an air conditioning system (having a charge of 50 Lbs or more) is leaking an ozone-depleting refrigerant at a rate exceeding 10% annually, it requires immediate remedial action.
Capacitors provide your AC’s compressor the initial push to start and then keep it working. A faulty capacitor means your compressor won’t start at all or will work inconsistently. So, your AC will blow warm air in this case, even when the blower is running.
If your AC is undersized in comparison to the space it’s trying to cool, it simply lacks the cooling capacity to remove heat effectively. It will either run constantly and won’t achieve the desired temperature, or it will blow warm air. Ultimately, you will end up with premature wear and tear along with high energy bills. This issue is more prevalent in houses that have been remodeled or expanded.
Review the following information before selecting the size of your air conditioner to ensure optimal efficiency, considering the room size.
Source: Energy Star
If your AC’s indoor unit is working, but the outdoor condenser unit has lost its power owing to a tripped circuit breaker, your air conditioner will circulate air, but without any cooling.
A compressor compresses the refrigerant, followed by its circulation through the system, allowing heat transfer and cooling of the air. When a compressor malfunctions, the refrigerant isn’t compressed, and there is no heat exchange, disrupting the cooling cycle. Consequently, your system blows warm air.
Air ducts transport cool air from your air conditioner to various parts of your house. If your AC’s air ducts are clogged, leaking, or constricting, your AC will blow warm air. Leaky ducts can cut down the cooling system efficiency by approximately 20%.
Leaked air ducts will cause the cool air to escape to the unconditioned areas long before it reaches the vent. So, the air coming out of the vent will feel warm instead of cold. Furthermore, clogged ducts slow down or restrict the airflow, causing insufficient cooling.
Moreover, even relocating your ductwork to conditioned spaces will cut down 8-15% on the costs incurred from air conditioners.
Return vents pull air from your room & supply it back to the air conditioner for cooling purposes. If return vents are blocked, for example, due to dust buildup, the warm air can’t be pulled effectively. Without sufficient warm air, there is nothing to cool. Air cycling becomes limited and stale, and the AC can blow warm air.
The following reasons make San Antonio homes more vulnerable to AC cooling problems.
San Antonio has a high humidity, approximately 80% particularly in the early morning. It experiences an intense summer, for instance, 75 days having a temperature of 100°F have been recorded alone in 2023.
These extreme temperatures and high humidity force your AC unit to work harder and with higher efficiency. Eventually, you may experience a dip in performance or warm air due to excessive workload.
Older homes existing in San Antonio are outdated and devoid of modern insulation. Inadequate insulation, particularly in walls and attics, makes it challenging for your AC to cool your space. Your system can be overburdened and can lose its cooling capacity.
Source: United States Census Bureau
Problems | Solutions | DIY or Professional |
Faulty Thermostat | Check settings & reset them to cool, fix issues in calibration | DIY (for setting issues) Professional (calibration or replacement) |
Dirty or Clogged Filters | Remove and clean, or if required, replace the air filter | DIY |
Low Refrigerant Levels | Locate the leaks, get them repaired & recharge the refrigerants | Requires air conditioning repair service in San Antonio, Texas |
Failing Capacitor | Replace the capacitor or get it fixed if possible | Professional AC repair in San Antonio |
Undersized Units | Analyze cooling capacity & room size. Replace with a properly sized AC unit | Requires professional evaluation |
Frozen Evaporator Coils | Switch off the AC to thaw, inspect refrigerant levels | DIY (initial thawing process) Seek professional help if the problem recurs |
Electrical Fault or Tripped Breakers | Inspect the wiring and circuit panel, and reset the breaker | DIY (Resetting) Professional (Replacement or rewiring) |
Faulty Compressor | Evaluate compressor health, replace or repair | Professional |
Duct Leaks | Seal leaking ductwork, and replacement of damaged portions | Professional A study reveals that a 49 to 65% savings, resulting mainly from reduced fan heat and fan power, can be achieved via duct sealing. |
Blocked Return Vents | Clean the debris, remove blockages such as furniture or curtains | DIY |
Warm air problems can be prevented in the following ways:
Your AC is blowing warm air, and you need AC repair services in San Antonio to fix this. Kidd Mechanical can help. We are a team of experienced and certified technicians who can offer a quick resolution. Our transparent pricing and reliable services will provide you with the comfort you are looking for.
Furthermore, we have genuine parts and updated equipment to cater to your issues. In addition, we have a proven track record with a multitude of positive reviews, so you can rely on us without any doubt. Call 210-589-2292 to schedule a visit today!
Turn off the AC if it blows hot air, as this indicates a mechanical issue or refrigerant failure. Continuing to run it can cause compressor damage or higher repair costs. Shut it down and call a technician to prevent further damage.
Your AC may run without cooling due to low refrigerant, a dirty air filter, frozen evaporator coils, or a faulty compressor. Each issue prevents proper heat exchange, resulting in airflow without temperature drop. Have a technician inspect the unit to diagnose and repair.
Check AC refrigerant level by attaching a manifold gauge set to the service valves. Compare the pressure readings to the system’s specifications. Only certified technicians should add or remove refrigerants. Incorrect levels affect cooling performance and may damage the compressor.
Your AC may struggle to cool your house due to dirty filters, low refrigerant, duct leaks, or an undersized unit. These issues reduce airflow and cooling efficiency. Identify the root cause by checking filters, inspecting ducts, and evaluating system size.
