10 Common HVAC Problems and How to Fix Them Oct 11, 2025

Maintaining a comfortable indoor environment is crucial, and your heating, ventilation, and air conditioning (HVAC) system plays a vital role in this process. However, like any complex system, your HVAC can encounter issues that disrupt its function. As part of providing the best service, Paul Proffitt Heating & Air is here to outline ten common HVAC problems and how to fix them, ensuring your comfort year-round.

An HVAC system can experience a variety of problems, many of which are preventable with regular maintenance. Understanding these common issues can help you recognize early warning signs, potentially saving you from costly repairs.

One frequent issue is a clogged or dirty filter. Dirty filters restrict airflow, making your system work harder than necessary, which can lead to increased energy costs and potential damage to your unit. Changing your filters every 1-3 months can alleviate this problem and enhance efficiency.

Another common problem is thermostat malfunctions. An inaccurate thermostat can lead to your HVAC system working overtime or not enough. Ensure your thermostat is on the correct setting and replace the batteries if necessary. For more complex issues, consider contacting a professional for a comprehensive evaluation.

If your system isn't heating or cooling properly, the issue might be linked to refrigerant leaks. Low refrigerant levels indicate a leak and can significantly impact your system's efficiency. This problem requires a qualified technician to repair the leak and recharge the system.

Strange noises such as clanking, banging, or squealing from your HVAC can indicate various mechanical problems. Loose parts, a broken motor, or a failing blower motor can create these noises. Scheduling routine maintenance with professionals like Paul Proffitt Heating & Air can prevent these issues from escalating.

Another culprit of HVAC inefficiency is poor airflow. This can be caused by blocked vents, duct obstructions, or dirty compressors. Check for visible obstructions and remove them yourself. For more intricate blockages, a certified technician is your best bet for sustaining your system's performance.

Pilot or ignition issues often stem from dirty sensors or faulty components, affecting your system's ability to produce heat. It's a good idea to have an expert routinely inspect and clean these components to prevent failures.

Frequent cycling is another problem you might encounter, where your system turns on and off too often. This could be due to a poorly calibrated thermostat or an underlying mechanical issue. Not only is continuous cycling inefficient, but it also raises energy bills. A professional assessment can identify and rectify the root cause.

Malfunctioning drain lines can cause water to back up into your unit, damaging components and causing leaks. Regular inspection and cleaning of your unit's drainage system will prevent these issues.

Additionally, sensor issues can disrupt the regulation of your system. The sensors monitor room temperature and relay this information to the control board. If they're misaligned or malfunctioning, they can throw off the entire system. Reposition or replace sensors to ensure accurate readings.

Lastly, high energy bills can be a sign of inefficiencies or outdated equipment. Upgrading to an energy-efficient system with the help of experts can drastically reduce costs and enhance comfort.

In conclusion, while HVAC problems can seem daunting, many are preventable with proper maintenance and timely interventions. At Paul Proffitt Heating & Air, we are committed to keeping your system running smoothly. Whether you need routine maintenance or complex repairs, our expert team is here to help. Prioritize regular check-ups, and you'll enjoy a comfortable home environment and peace of mind knowing your HVAC system is in top condition.