When your air conditioner suddenly stops blowing cold air on a hot Texas afternoon, you can bet something simple has gone wrong. Most HVAC problems aren’t disasters waiting to happen — they’re common issues that start small and get worse if ignored. The good news? Knowing what to look for can help you fix problems early and avoid a meltdown when it’s 102° outside.
Here are the most common HVAC repairs we see around Pflugerville and how regular service can save you time, stress, and money.
1. Dirty Air Filters
A clogged air filter is the number one cause of AC problems. When the filter gets packed with dust and debris, it blocks airflow, forcing your system to work harder. That extra strain can cause frozen coils, weak airflow, and higher energy bills.
The fix: Replace your air filter every one to three months, depending on your home’s dust level and whether you have pets. It’s the cheapest, easiest way to prevent bigger repairs later.
2. Low or Leaking Refrigerant
If your AC isn’t cooling like it used to, you might have a refrigerant leak. Low refrigerant levels reduce your system’s ability to absorb heat, leaving your home warm and muggy. Over time, leaks can damage the compressor — one of the most expensive parts to replace.
The fix: A certified HVAC technician can find and repair the leak, then recharge the refrigerant to factory levels. Don’t ignore this one — running your system low on refrigerant can cause major damage.
3. Dirty Condenser or Evaporator Coils
Over time, your system’s coils can collect dirt, pollen, and grime. When that happens, they can’t transfer heat efficiently, forcing the unit to work longer and harder. This problem is especially common in Pflugerville, where high pollen counts and yard dust clog coils fast.
The fix: Schedule annual AC maintenance to have the coils cleaned professionally. Keeping the area around your outdoor unit clear of leaves and grass clippings helps too.
4. Electrical Problems
Your HVAC system has multiple electrical components — relays, contactors, fuses, and circuit boards. When one of these fails, your AC may not start, or it might shut off unexpectedly. Pflugerville’s frequent summer storms can also cause surges that damage electrical parts.
The fix: Have your HVAC technician inspect wiring and electrical components during regular maintenance. Installing a surge protector for your AC system is also a smart move.
5. Thermostat Malfunctions
Sometimes, the issue isn’t your HVAC system at all — it’s the thermostat. Dead batteries, bad sensors, or improper calibration can cause your unit to short cycle or fail to turn on.
The fix: Replace thermostat batteries once a year and make sure it’s level and clean inside. If it’s outdated, consider upgrading to a programmable or smart thermostat for more accurate temperature control.
6. Blower Motor Issues
The blower motor is responsible for pushing conditioned air through your ducts. When it fails, your AC might hum but won’t move air. Common causes include dirty blower wheels, worn belts, or electrical faults.
The fix: Routine maintenance keeps the blower motor clean and lubricated. If it’s making unusual noises or struggling to start, call for service before it burns out completely.
7. Tripped Breakers or Blown Fuses
Your AC draws a lot of power, and when it’s under strain, it can trip the circuit breaker. This often points to a clogged filter, dirty coil, or failing capacitor causing the system to overheat.
The fix: If your breaker trips repeatedly, don’t just flip it back on. Have a technician inspect the system to find the root cause.
8. Clogged Condensate Drain Lines
Your AC removes moisture from the air as it cools, draining it through a condensate line. When this line clogs with algae or debris, it can back up and trigger a safety switch that shuts the system down.
The fix: During seasonal maintenance, your technician should flush and clean the condensate line. You can also pour a small amount of vinegar down the drain every few months to help prevent buildup.
9. Worn Capacitors and Contactors
Capacitors and contactors regulate electrical flow in your system. When they weaken or fail, your AC may not start or could struggle to stay running. These parts wear out naturally over time, especially in high-heat environments like Central Texas.
The fix: Replacing these small components early prevents bigger electrical damage later. Most technicians check them automatically during a tune-up.
10. Clogged or Leaking Ducts
Leaky or blocked ductwork is another hidden problem. You may not notice it until certain rooms feel warmer or cooler than others. That lost air means wasted energy and higher utility bills.
The fix: Have your ducts inspected every few years for leaks or buildup. Sealing gaps can improve airflow and efficiency across your entire home.
Why These Problems Are So Common in Pflugerville
Between scorching heat, dust, and humidity, Central Texas is rough on HVAC systems. Units run almost year-round, giving them fewer breaks and more wear. Combine that with cottonwood fluff, yard debris, and power surges, and you have the perfect recipe for frequent repairs.
The best defense is simple: schedule regular AC maintenance. Catching problems early costs a lot less than waiting for a breakdown.
Save Yourself the Headache
Most HVAC repairs start as small issues that could’ve been prevented with routine service. Don’t wait until your AC quits in the middle of July.
At Altruistic AC Heating & Plumbing, we’ve seen every type of HVAC problem Pflugerville can throw at us. Our technicians can spot the warning signs, fix them fast, and help keep your system running at peak performance all season long.
Ready to prevent the most common HVAC repairs before they happen?
Schedule your AC service today with Altruistic AC Heating & Plumbing, your trusted local HVAC pros in Pflugerville, Texas.
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YouTube Video: Top 10 Most Common AC Repairs Explained
