How to Troubleshoot Common HVAC Problems

Maintaining a comfortable home environment relies heavily on the proper functioning of our HVAC system. However, like any other household equipment, HVAC systems can encounter issues that may disrupt their performance. Understanding common HVAC problems helps us take quick action to address them, ensuring our home remains comfortable and energy-efficient.

Many of us may face similar issues, such as poor airflow, thermostat malfunctions, refrigerant leaks, and unusual noises coming from the HVAC unit. Knowing how to identify these problems can make a significant difference in how quickly and effectively we can resolve them. Additionally, timely intervention can prevent minor issues from escalating into major, costly repairs.

In this article, we aim to provide you with clear, simple steps to troubleshoot and fix these common HVAC problems. By following these guidelines, we can work towards maintaining a reliable and efficient heating and cooling system in our homes, ensuring year-round comfort and peace of mind.

Identifying Issues with Airflow

One of the most common problems we may encounter with our HVAC systems is poor airflow. Identifying these issues early can save us from uncomfortable indoor conditions and higher energy bills. Blocked vents and registers can cause restricted airflow, so it’s important to keep them clear of any furniture, carpets, or other obstructions. Dust and debris buildup in the ducts can also impede airflow, making it harder for our HVAC system to distribute air properly throughout the house.

Another possible cause of limited airflow is a clogged air filter. Air filters are designed to trap particles such as dust, pollen, and pet dander. When these filters become clogged, they restrict the flow of air, causing the system to work harder and less efficiently. We should check and replace our filters regularly, ideally every one to three months, to maintain optimal airflow. Additionally, ensuring that the blower fan is functioning correctly is crucial for proper airflow. If the fan is dirty or malfunctioning, it won’t be able to circulate air effectively. Regular maintenance and prompt troubleshooting can help us identify and fix these airflow issues, ensuring our HVAC system works efficiently.

Resolving Thermostat Problems

The thermostat plays a pivotal role in regulating the temperature in our homes. If the HVAC system is not responding correctly to the thermostat settings, it can cause discomfort and inefficient operation. The first step in resolving thermostat problems is to check the power source. Sometimes, it might be as simple as replacing batteries or ensuring that the thermostat is properly connected to the electrical system. We mustn’t overlook the importance of ensuring the thermostat is set to the correct mode, whether heating or cooling, depending on the season.

If the thermostat is still acting up, it might be a calibration issue. Thermostats can sometimes lose their calibration and may display incorrect temperatures. In this case, following the manufacturer’s instructions to recalibrate the thermostat can be helpful. Additionally, proper placement of the thermostat is key. If it is located in a place where it is exposed to direct sunlight, drafts, or heat-generating appliances, it may give false readings, making the HVAC system work unnecessarily. We should ensure our thermostat is placed in a location that accurately reflects the room’s temperature. Following these steps can help us resolve common thermostat problems, keeping our home comfortable and our HVAC system running smoothly.

Identifying Issues with Airflow

When it comes to our HVAC systems, proper airflow is crucial for maintaining a comfortable home environment. One of the most common signs of airflow problems includes uneven heating or cooling across different rooms. If we notice that some areas of our home are significantly warmer or cooler than others, it’s a clear indication that there is an issue with airflow. Restricted airflow can also be identified by weak or reduced air coming from the vents.

To address these issues, we first need to check and replace our air filters regularly, as clogged filters can obstruct airflow. It’s also important to inspect and clean the ductwork to remove any blockages caused by dust, debris, or even small animals. Ensuring that vents are open and unobstructed by furniture or curtains is another simple yet effective way to improve airflow. By taking these steps, we can enhance the efficiency of our HVAC system and maintain a consistent temperature throughout our home.

Resolving Thermostat Problems

Sometimes, issues with our HVAC system can be traced back to the thermostat. If the system isn’t turning on, it’s not cycling properly, or the temperature isn’t matching the settings, there could be a problem with the thermostat. First, we should check the thermostat’s settings to ensure it is set to the correct mode (heating or cooling) and that the temperature is set appropriately.

If the settings are correct but the problem persists, it may be necessary to recalibrate the thermostat. This involves ensuring it is correctly reading the room temperature and making the necessary adjustments. Additionally, we should check the batteries to see if our thermostat is battery-operated or verify the wiring to see if it’s hardwired. If the problem remains unresolved, it might be time to consider upgrading to a smart thermostat for more accurate and efficient temperature control.


Ensuring our HVAC system functions properly throughout the year, especially during the extreme temperatures of winter and summer, requires regular maintenance and timely troubleshooting. From identifying and fixing airflow issues to resolving thermostat problems, maintaining our HVAC system’s efficiency helps us enjoy a comfortable and energy-efficient home.

With the complexities involved in diagnosing and repairing HVAC issues, seeking professional help can provide peace of mind and ensure that our system operates at its best. At Legacy Heating, we offer expert advice and services to address any HVAC concerns you might have. 

Contact our HVAC contractors in Edmonton today to keep your home comfortable and your HVAC system running smoothly all year round.

HVAC Brands We're Proud to Carry

Legacy only uses the most efficient and cost-effective HVAC products. We pride ourselves on putting quality and customers first! We will equip your new home with the best HVAC system and offer the most reliable residential heating service in Edmonton and Calgary.

Contact Us Today

We’ll help you find the right heating and air conditioning system for you and your budget.

Edmonton Area 780-733-1256 Calgary Area 403-451-1337

Honesty, Integrity, Legacy