Your HVAC system works hard to keep your home comfortable year-round, but like any mechanical system, it can run into problems. The good news? Many common HVAC issues can be easily diagnosed — and in some cases, fixed — before they turn into major (and expensive) repairs.
Here are the five most common HVAC problems homeowners face and what you can do to fix them.
1. Dirty or Clogged Air Filters
Problem: A clogged air filter restricts airflow, forcing your HVAC system to work harder and reducing efficiency. Fix: Replace or clean your air filter every 1–3 months to maintain airflow and system performance.
2. Thermostat Malfunctions
Problem: A malfunctioning thermostat can cause inaccurate temperature readings and inconsistent heating or cooling. Fix: Check the batteries, recalibrate if necessary, or replace the thermostat with a smart or programmable model.
3. Leaking Ductwork
Problem: Leaky ducts can cause heated or cooled air to escape, reducing efficiency and increasing energy bills. Fix: Inspect ducts for visible holes or loose connections and seal them with duct tape or mastic sealant.
4. Frozen Coils
Problem: Frozen coils occur when the evaporator coils freeze, often due to low refrigerant or poor airflow. Fix: Turn off the system to let the coils thaw. Replace the air filter and contact a technician if refrigerant levels are low.
5. HVAC System Short Cycling
Problem: Short cycling happens when the system turns on and off frequently, usually due to an oversized unit, clogged filter, or thermostat issue. Fix: Check and replace the air filter, ensure the thermostat is correctly calibrated, and contact a technician if the problem persists.
Conclusion
Regular maintenance and quick fixes can help prevent common HVAC problems, keeping your system running efficiently and avoiding costly repairs. Simple tasks like changing air filters or checking for leaks can make a big difference in the longevity and performance of your HVAC system.