BLOG How to Troubleshoot Common HVAC Issues Before Calling a Professional Jan 15, 2025

When your HVAC system isn’t working as expected, it can be tempting to panic and immediately call in a professional. However, you can often resolve some common HVAC issues on your own with a little troubleshooting. At Nygaard Heating and Air Conditioning, we believe in empowering our customers with the knowledge they need to maintain their systems. Here’s how you can troubleshoot common HVAC problems before picking up the phone for a professional service.

One of the first steps in HVAC troubleshooting is to check the thermostat settings. Ensure the thermostat is on, set to the correct mode, and the temperature settings are appropriate. Sometimes, the issue might be as simple as a dead battery in the thermostat. Replacing the battery can often resolve the problem without the need for assistance.

If the thermostat looks good, move on to inspecting the air filters. Dirty or clogged air filters can significantly affect your system’s efficiency, leading to inadequate heating or cooling and sometimes triggering error codes. Replace or clean the filters based on the manufacturer’s recommendations—usually every one to three months. Keeping filters clean not only improves HVAC performance but also enhances indoor air quality.

Next, examine the circuit breakers. Power disruptions or overloads can trip the breaker, cutting power to your HVAC system. If the breaker for your HVAC unit has tripped, reset it and observe if the system resumes normal operation. Be cautious, as repeated tripping can indicate a more serious electrical issue that might require a professional’s attention.

Another area to explore involves the outdoor units. Debris such as leaves, dirt, or even snow accumulation around the condenser unit can restrict airflow, causing the system to overheat and shut down. Ensure that the area around the unit is clear of obstructions and clean the unit as needed. Gently rinse the condenser coils with a hose to remove accumulated dirt, but take care not to damage the delicate fins.

For systems exhibiting uneven heating or cooling, check the vents and air registers. Make sure they are open and unblocked by furniture or drapes, which can disrupt airflow. If one area of your home remains uncomfortable, it might be an issue with the ductwork, like a blockage or a detachment, which may require professional inspection.

You might also encounter strange noises emanating from your HVAC system. Rattling noises could indicate loose screws or panels, while squealing might be due to a worn-out fan belt. Tighten screws as necessary, and if the noise persists, consider whether a belt replacement is needed, which could still be a DIY task if you are comfortable with it.

Finally, if the furnace or AC fails to start, check the pilot light or ignition system. For gas furnaces, ensure the pilot light is burning; it may require relighting as per the manufacturer’s instructions. For more modern models with electronic ignition, inspect for apparent issues, keeping in mind that delicate components might need a professional hand.

By following these troubleshooting steps, you can solve minor HVAC issues without needing a professional, saving both time and money. However, if problems persist or you are uncertain about handling certain tasks, it’s best to seek help from Nygaard Heating and Air Conditioning’s expert technicians. Our team is ready to ensure your system operates smoothly and efficiently for your comfort and peace of mind.