The Most Common HVAC Repairs and How to Prevent Them

Your HVAC system is one of the most important parts of your home, keeping you comfortable year-round. However, like any mechanical system, it requires regular care and maintenance to function properly. Without proper upkeep, your heating and cooling system can develop issues that lead to costly repairs.

At Texas Air Authorities, we’ve seen it all—from frozen AC coils to faulty thermostats. The good news? Many HVAC repairs can be prevented with routine maintenance and early detection. Below, we’ll go over some of the most common HVAC repairs and how you can prevent them from happening in the first place.

Dirty or Clogged Air Filters

The Problem:
One of the most common HVAC issues is a dirty air filter. When filters become clogged with dust, dirt, and pet dander, they restrict airflow, making your system work harder. This can lead to reduced efficiency, overheating, frozen coils, and poor indoor air quality.

How to Prevent It:

1. Change your air filter every 1-3 months, depending on usage and household conditions.
2. Use high-efficiency filters for better air quality.
3. Schedule seasonal HVAC tune-ups to ensure airflow remains unobstructed.

Refrigerant Leaks

The Problem:
Refrigerant is essential for your air conditioner to cool your home. A refrigerant leak can cause your AC to blow warm air, reduce efficiency, and lead to compressor failure—one of the most expensive HVAC repairs.

How to Prevent It:

1. Have a professional check refrigerant levels during annual maintenance.
2. If you hear a hissing sound or notice ice forming on your evaporator coils, call for immediate repair.
3. Avoid DIY fixes—handling refrigerant requires a licensed technician.

Thermostat Malfunctions

The Problem:
A malfunctioning thermostat can cause your HVAC system to short-cycle (turn on and off frequently), fail to maintain the set temperature, or not turn on at all.

How to Prevent It:

1. Replace thermostat batteries annually.
2. Upgrade to a smart thermostat for better efficiency.
3. Keep the thermostat away from heat sources like direct sunlight and vents to prevent false readings.

Electrical Component Failures

The Problem:
Your HVAC system has several electrical components, such as capacitors, relays, and contactors. Over time, these can fail, causing your system to stop working or display erratic behavior.

How to Prevent It:

1. Schedule an annual inspection to check for worn-out wiring or electrical issues.
2. If you hear buzzing or clicking sounds, it may indicate an electrical issue—get it checked before your system shuts down.
3. Never attempt to repair electrical components yourself—this can be dangerous without proper training.

Frozen Evaporator Coils

The Problem:
If your AC suddenly stops cooling, frozen coils may be the issue. This happens when there is insufficient airflow due to dirty filters, blocked vents, or low refrigerant levels.

How to Prevent It:

1. Change your air filter regularly to maintain airflow.
2. Keep air vents unblocked—avoid placing furniture or curtains over vents.
3. If you notice ice buildup, turn off your system and call a professional for a full inspection.

Blower Motor Issues

The Problem:
The blower motor circulates air throughout your home. If it malfunctions, you may notice weak airflow, strange noises, or a failure to reach the desired temperature.

How to Prevent It:

1. Schedule routine maintenance to inspect and lubricate moving parts.
2. If you hear a grinding or screeching noise, call for immediate service.
3. Keep your system free from dust buildup that can overwork the blower motor.

Clogged or Leaky Ductwork

The Problem:
Leaky or clogged ducts reduce airflow, make your system less efficient, and increase your energy bills. This forces your HVAC system to work harder, leading to unnecessary wear and tear.

How to Prevent It:

1. Have your ductwork inspected and cleaned every 2-3 years.
2. Seal leaks with professional-grade materials to prevent air loss.
3. If your home is always dusty, your ducts may be dirty—consider air duct cleaning.

Ignition or Pilot Light Problems (Furnaces Only)

The Problem:
If your furnace won’t start or produces weak heat, the ignition system could be the issue. Problems with the thermocouple, pilot light, or ignition switch can cause the system to shut off or fail to heat properly.

How to Prevent It:

1. Schedule annual furnace maintenance before winter arrives.
2. Check for a yellow pilot light flame—if it’s not blue, your furnace may have a gas issue.
3. If your furnace keeps shutting off, call a professional to inspect the ignition system.

Water Leaks and Drainage Issues

The Problem:
Your AC produces condensation that should drain away properly. However, if the drain line gets clogged, water can back up and cause leaks, water damage, and mold growth.

How to Prevent It:

1. Clean the drain line regularly to prevent clogs.
2. If you notice water pooling around your unit, call a technician to clear the drain.
3. Keep the area around your indoor unit dry and free of debris.

Strange Noises or Unusual Smells

The Problem:
Unusual banging, rattling, or screeching noises can indicate loose parts, motor issues, or belt problems. Musty or burning smells could signal mold growth, electrical issues, or overheating components.

How to Prevent It:

1. If you hear loud noises, turn off your system and call for an inspection.
2. If you smell something burning, shut down your HVAC unit and get it checked immediately.
3. Regular maintenance can catch small issues before they turn into major problems.

Conclusion

Your HVAC system is a major investment, and taking care of it prevents costly repairs and extends its lifespan. The best way to avoid unexpected breakdowns is through routine maintenance and early detection of issues.

At Texas Air Authorities, we offer comprehensive HVAC services, including seasonal tune-ups, emergency repairs, and new system installations. If you’re experiencing any of these common issues—or just want to prevent them—give us a call today! Schedule your HVAC maintenance with Texas Air Authorities now!