HVAC Preventive Maintenance: A Look at the 2 Major Categories

Heating, ventilation, and air conditioning (HVAC) systems participate a crucial role in maintaining the indoor air quality and thermal comfort of any building. A well-functioning HVAC system not only ensures a comfortable living and working environment but also contributes to the energy efficiency of the building. Therefore, it is essential to have a preventive maintenance plan in place to keep your HVAC system operating at its peak performance. 

In this blog, we will discuss the significant categories of HVAC preventative maintenance and why it is essential for the longevity of your HVAC system.

Category 1: Routine Maintenance

Routine maintenance is the most basic yet essential form of HVAC preventive maintenance. It involves regular cleaning, inspection, and upkeep of your HVAC system’s components. A routine maintenance schedule can prevent minor issues from becoming major problems and ensure that your HVAC system operates efficiently. Some of the critical tasks included in regular maintenance are:

1. Cleaning and Replacing Air Filters

Dirty air filters can lead to unsatisfactory indoor air quality and increased energy consumption as your HVAC system works harder to circulate air. It is recommended to clean or replace your air filters every 1-3 months, revolving around the type of filter and the amount of dust and pollutants in the environment.

2. Inspecting and Cleaning Evaporator and Condenser Coils:

Over time, dirt and debris can grow on the coils, reducing their heat transfer capability and causing the system to work harder. Regular cleaning of evaporator and condenser coils ensures efficient functioning and prolongs the life of your HVAC system.

3. Checking and Tightening Electrical Connections

Loose electrical links can lead to unsafe operating conditions and reduced system performance. Routinely inspecting all electrical connections and tightening them as required can prevent potential hazards and ensure optimal functioning.

4. Lubricating Moving Parts

Regular lubrication of all moving parts, such as motors and bearings, reduces friction and wear, ensuring smooth operation and extending the life of your HVAC system.

5. Inspecting and Adjusting Belts and Pulleys

Belts and pulleys should be checked for wear and tear, and proper tension should be maintained to prevent reduced efficiency and potential damage.

6. Checking and Cleaning the Drain Pan and Condensate Drain Lines

Clogged drains can contribute to water damage and mould growth, affecting indoor air quality. Regular cleaning of the drain pan and condensate drain lines prevents blockages and ensures proper drainage.

Category 2: Seasonal Maintenance

Seasonal maintenance is performed at the beginning and end of each heating and cooling season to ensure your HVAC system is adapted to handle the increased workload efficiently. Some of the tasks involved in seasonal maintenance include:

1. Inspecting and Testing Safety controls

Safety controls, such as high and low-pressure switches, should be inspected and tested to ensure they function correctly and prevent potential hazards.

2. Checking Refrigerant Levels

Proper refrigerant levels are essential for efficiently operating your AC system. During seasonal maintenance, refrigerant levels should be checked, and any leaks should be repaired.

3. Calibrating Thermostats

Proper thermostat calibration ensures accurate temperature settings and efficient system operation. Thermostats should be calibrated at the beginning of each heating and cooling season.

4. Inspecting and Cleaning Heat Exchangers

Heat exchangers should be inspected for any signs of corrosion or damage and cleaned to ensure efficient heat transfer.

5. Inspecting and Cleaning the Combustion Chamber

The combustion chamber should be inspected for any signs of damage or corrosion for gas furnaces and cleaned to ensure efficient combustion.


Investing in preventive care for your HVAC system is an intelligent decision that will save you time and money and ensure a comfortable, healthy environment in your home or building. Consult a professional HVAC contractor or service provider to schedule maintenance and address any concerns or issues.

Legacy Heating is a distinguished company that provides comprehensive HVAC solutions for residential new home construction. With a range of high-quality products and services, including installation and replacement of furnaces, air conditioners, air cleaners, thermostats, humidifiers, heat recovery ventilation units, and unit heaters, we are committed to ensuring a comfortable and energy-efficient living environment for homeowners. Don’t hesitate to contact us today and let our HVAC contractor in Calgary and Edmonton help you create the perfect atmosphere in your new home or upgrade your existing system to enhance your overall comfort and well-being.

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