Common HVAC Problems and How to Fix Them Jul 01, 2025

The first and most frequent HVAC problem is poor air flow. Many homeowners report that their systems are not distributing air evenly throughout the house. One common cause is a clogged air filter, which restricts airflow and forces your system to work harder, leading to increased energy consumption and reduced efficiency. To fix this, regularly inspect your air filters and replace them every one to three months, depending on usage. Additionally, check vents and registers to ensure they are open and unobstructed by furniture or other objects, allowing for smooth air movement.

Another common issue is refrigerant leaks, which can significantly affect your air conditioner's cooling capacity. A system with low refrigerant levels will not cool properly and can lead to increased wear and tear on the compressor. If you suspect a refrigerant leak, it's best to contact a professional HVAC technician immediately. They can accurately diagnose the problem, repair any leaks, and recharge the system with the correct amount of refrigerant.

Thermostat problems are another cause of HVAC malfunctions. If your system is not turning on or if the temperature in your home doesn't match the thermostat settings, it could indicate a faulty thermostat. Begin troubleshooting by checking the thermostat settings, ensuring it is set to the right mode and temperature. If the problem persists, replace the batteries and clean any dust or debris inside the thermostat. For programmable thermostats, confirm that the scheduling settings are correct.

Unusual noises coming from your HVAC system are often a sign that something is amiss. A squealing or screeching noise may indicate a worn belt, while a rattling sound could mean loose components or debris in the system. Addressing these noises promptly can prevent more serious issues from developing. Start by checking for any visible obstructions and tighten loose parts. If these solutions don't resolve the issue, consult with an HVAC technician for a more thorough inspection.

Finally, frequent cycling on and off, also known as short cycling, can be a significant problem. This issue might arise from incorrect unit sizing, thermostat malfunctions, or an air filter that needs replacing. Short cycling not only reduces the efficiency of the system but also increases energy costs and can shorten the lifespan of your HVAC. If replacing the air filter and verifying the thermostat settings don't solve the problem, seek professional advice to assess the right system size for your home.

In conclusion, while some HVAC problems can be remedied with simple maintenance tasks, others may require the expertise of a professional technician. Regular inspection and maintenance can prevent many of these common issues, ensuring your system runs smoothly and efficiently. By taking these proactive steps, you can extend the life of your HVAC system, improve energy efficiency, and maintain a comfortable home environment. Remember, when in doubt, the professionals at Supreme Heating & Cooling are always ready to provide expert guidance and service.