Heating & Cooling Systems Inc.
(416) 272-8898
(Toronto, York & Durham)
(289) 291-7000
(Peel & Halton Regions)
HVAC Maintenance 101
April 27, 2017, by George Li

HVAC Maintenance 101

Why is HVAC maintenance important, you might ask? Just as exercising acts as preventative maintenance for your body and your health, HVAC maintenance acts as a preventative measure to keep your equipment running at optimal levels and extends the life of your HVAC system.

If you’re thinking about the number components that go into an HVAC system and are starting to grow alarmed, don’t. There is an easy way to put you and your HVAC maintenance system on a schedule, which is by keeping each component’s resource and a printed checklist together in a file or binder.

For your checklist, we recommend dividing your HVAC maintenance tasks in terms of how frequently they need to be performed, so monthly, seasonally, and annually. You can even go the extra mile to color-code your checklist by which part of the HVAC each task deals with.

Please keep in mind, this list is by no means exhaustive, but it will give you an idea of what each system needs.



  • Clear a space of about 2 ft from around your AC and heating units
  • Check your refrigerant lines monthly to ensure there are no leaks and that there’s the correct amount of refrigerant
  • Vacuum your interior vents to reduce the amount of dust floating around your home




  • Replace your air filters about every 3 months. Start using high-efficiency filters if you’re not already using them
  • Get a professional in to check your chillers and boilers
  •  Clean & inspect your cooling tower
  • Adjust your thermostat’s automatic settings based on the season




  • Replace the batteries in your carbon monoxide detector; get one if you don’t have one!
  • Lubricate any moving parts of your pumps
  • Check the ductwork in your home to spot any leaks, paying particular attention to your basement and attic
  • Clean your coils! Dirty coils make your system run inefficiently
  • At last twice annually, ensure the air intake vents of your AC and heating units are free of debris like leaves, pollen, and dirt
  • Check for water and mold damage on any part of the units


hvac-101Now, back to that binder of resources and checklist we mentioned earlier. To help in keeping track of your tasks, we also suggest putting your checklist into a printed spreadsheet and marking the date each time you perform the task.

We hope you’ve found our checklist helpful! We’d love to hear your questions in the comments below!


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