By the time July arrives in Central Texas, your air conditioning system will be running almost continuously. Waco, Killeen, and Temple regularly see temperatures above 100 degrees from June through September, and an HVAC failure in the middle of a Texas summer is not just uncomfortable. It can be genuinely dangerous, especially for children, elderly residents, and pets. Heat-related illness can develop quickly in an un-cooled home when outdoor temperatures are extreme.
Spring, particularly May, is the ideal window to identify HVAC issues before the peak season begins. Repair technicians are easier to schedule, parts are more readily available, and you have time to make decisions without the pressure of a 105-degree afternoon. Here are five warning signs that your system may not be ready for the summer ahead.
If some rooms in your home feel noticeably warmer or cooler than others, or if the airflow from your vents seems weaker than it used to be, this can indicate a failing blower motor, blocked or disconnected ductwork, or a refrigerant issue. Don’t dismiss it as “just that one room being weird.” Uneven cooling is almost always a symptom of something the system is struggling with, and it will only worsen under the full load of a Texas summer.
Common causes include dirty air filters restricting airflow, collapsed or kinked ductwork in the attic, improperly sealed duct connections that leak conditioned air before it reaches the living space, and blower fan issues. Some of these are inexpensive to fix. Others can be more involved. Either way, knowing about them in May rather than July is a significant advantage.
This is the most obvious warning sign, but it is worth stating clearly: if your AC is running but the air coming from your vents is warm or only slightly cool, something is wrong. Common culprits include low refrigerant, which may indicate a slow leak in the system, a dirty condenser coil that cannot shed heat efficiently, or a compressor that is beginning to fail. None of these issues improve on their own, and all of them will worsen under sustained summer load.
If you notice your home is consistently a few degrees warmer than your thermostat setting even when the system runs constantly, that is also a sign of reduced capacity that warrants a professional evaluation before temperatures climb further.
A properly functioning HVAC system should be relatively quiet during normal operation. Banging, clanking, squealing, grinding, or rattling sounds are not normal and usually indicate a mechanical problem. Banging or clanking often points to a loose or broken component in the blower assembly. Squealing can indicate a worn belt or bearing. Grinding may suggest motor bearing failure. Catching these early can mean the difference between a straightforward service call and a full system replacement after a catastrophic failure in August.
If your AC turns on and runs for just a few minutes before shutting off, then repeats this pattern frequently, it is short-cycling. This is one of the more damaging operational patterns an HVAC system can fall into. Short-cycling puts enormous stress on the compressor, drives up energy consumption, and means the system is never completing a full cooling cycle, so your home never reaches the set temperature.
Short-cycling is often caused by an oversized system relative to the home, a refrigerant issue, a failing thermostat, or a dirty evaporator coil. It is worth noting that short-cycling is not just a comfort problem. The compressor is the most expensive component in your HVAC system, and allowing it to short-cycle over a full summer season can shorten its remaining life significantly.
A sudden or gradual spike in your electricity bill in April or May, before peak summer heat has arrived, can indicate that your HVAC system is losing efficiency. Compare your bills to the same months in previous years. If you are paying significantly more to achieve the same indoor temperature, your system is working harder than it used to, which is a reliable indicator that something has degraded.
Efficiency losses can come from a dirty coil, low refrigerant, failing components, or simply age. Most residential HVAC systems have a service life of 15 to 20 years. A system that is 15 years old and showing any of the signs above should be evaluated with an eye toward whether repair or replacement is the more cost-effective path, before you are forced to make that decision urgently in the middle of summer.
When you purchase a home, a professional home inspection includes a thorough evaluation of the HVAC system: age, condition, proper installation, current functionality, and any visible deficiencies. Our inspectors at Upright Professional Inspections are trained to identify HVAC systems at or near the end of their service life, information that is critical for budgeting, negotiating repair credits, and planning for replacements.
If you are not currently buying a home but have noticed any of the warning signs described above, now is the time to have a professional take a look. You can review our inspection pricing online, and our New Homeowners maintenance guide is an excellent resource for understanding what ongoing system care looks like as a homeowner.