What should I do to prepare my furnace for winter

Start preparing your furnace for winter in early fall by replacing the air filter, checking your thermostat, and scheduling professional maintenance. This proactive approach helps ensure reliable heating when Ottawa's cold weather arrives and can prevent costly emergency repairs during peak season.

Filter replacement is the most important step you can take yourself. A dirty filter restricts airflow, making your furnace work harder and potentially causing it to overheat or cycle on and off frequently. Check your filter monthly during heating season - most standard filters need replacement every 1-3 months depending on your home's dust levels and whether you have pets.

Thermostat testing should be done before you need heat. Switch from cooling to heating mode and test that your furnace responds properly. If you have a programmable thermostat, review your winter schedule settings. Consider upgrading to a smart thermostat if yours is over 10 years old - modern thermostats can improve efficiency and provide better temperature control during Ottawa's variable winter weather.

Professional maintenance is crucial for gas furnaces in Ontario. A licensed HVAC technician will inspect the heat exchanger for cracks (a carbon monoxide safety concern), clean the burner assembly, check gas connections, test safety controls, and ensure proper venting. This annual service typically costs $150-$200 but can prevent expensive repairs and ensures your family's safety.

Additional preparation steps include clearing vents and returns of furniture or debris, checking that your carbon monoxide detectors have fresh batteries, and ensuring your outdoor venting isn't blocked by leaves or snow buildup. If your furnace is over 15 years old or had frequent repairs last winter, consider having it evaluated for replacement before heating season begins.

Safety reminder: Never ignore warning signs like strange odors, unusual noises, or yellow flames in gas furnaces. These can indicate serious problems requiring immediate professional attention. For comprehensive furnace preparation and maintenance in Ottawa, consider scheduling your annual tune-up with a TSSA-licensed technician who understands Ontario's heating requirements.

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