How to Prepare Your Furnace for Winter

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As the temperatures start to drop and winter approaches, it’s essential to ensure your furnace is in optimal condition. Preparing your furnace for the cold season can not only improve its efficiency but also help you avoid unexpected breakdowns when you need it most. In this blog post, we will discuss some key steps to take in order to prepare your furnace for winter, ensuring a warm and cozy home during those chilly days and nights.

1. Schedule a Professional Inspection

The first step in preparing your furnace for winter is to schedule a professional inspection. A licensed HVAC technician will thoroughly examine your furnace, checking for any potential issues or necessary repairs. They will clean and lubricate essential components, ensuring maximum efficiency and optimal performance. This inspection will also help identify any safety concerns, such as carbon monoxide leaks, ensuring that your furnace operates safely throughout the winter months.

2. Change the Air Filters

Clean air filters are vital for the efficiency of your furnace. Over time, filters become clogged with dust, debris, and allergens, obstructing proper airflow and reducing heating efficiency. It is recommended to change your filters every 1-3 months, depending on the manufacturer’s instructions and the amount of dust and pet dander in your home. Installing fresh, clean filters will allow your furnace to operate more efficiently and keep the air in your home clean and healthy.

3. Inspect and Clean Air Vents and Ducts

Next, inspect and clean your air vents and ducts. Remove any obstructions, such as furniture or rugs, blocking the airflow. Vacuum the vents to remove dust and debris, ensuring optimal air circulation. If you notice excessive dust buildup or mold growth in your ductwork, it may be time to schedule a professional duct cleaning service. This will not only improve your furnace’s efficiency but also enhance your indoor air quality, reducing allergens and promoting healthy respiratory function.

4. Check and Reset Your Thermostat

Ensure that your thermostat is functioning correctly by testing it before winter arrives. Set the temperature to a higher setting to ensure that your furnace starts and runs smoothly. If your thermostat is outdated or malfunctioning, consider upgrading to a programmable thermostat. These modern thermostats allow you to set different temperature schedules, saving energy when you’re away from home and ensuring optimal comfort when you return.

5. Clean Around Your Furnace

Take some time to clean the area around your furnace. Remove any clutter or debris that could obstruct airflow or pose a fire hazard. Ensure that no flammable items such as paper, cardboard, or chemicals are stored near your furnace. Keeping the area around your furnace clean and clear will help it operate safely and efficiently throughout the winter season.

6. Test Your Carbon Monoxide Detectors

Safety should always be a top priority when it comes to your home heating system. Carbon monoxide is an odorless and colorless gas that can be produced by malfunctioning furnaces, posing a serious health risk. Ensure that you have working carbon monoxide detectors installed near your furnace area and throughout your home. Test the detectors and replace the batteries if necessary. If your detectors are older than five years, consider replacing them to ensure optimal performance.

7. Stock Up on Fuel and Schedule Deliveries

If your furnace runs on fuel such as oil or propane, make sure you have an adequate supply for the upcoming winter season. Contact your fuel provider to schedule deliveries, ensuring that you won’t run out of fuel during the coldest days. It’s always advisable to have a backup supply of fuel in case unexpected circumstances prevent timely deliveries.


By following these steps to prepare your furnace for winter, you can ensure that your heating system operates efficiently and safely throughout the cold season. Regular maintenance, inspections, and cleaning will not only prolong the lifespan of your furnace but also provide you with a warm and comfortable home during those chilly winter months. Stay cozy and stress-free by taking care of your furnace before the cold weather arrives!

Need HVAC Services in St. Louis, MO?

Keep cool or stay warm with Ashley Brothers Heating & Cooling. Since 1999, Ashley Brothers have been providing residential and commercial services to the St. Louis and Jefferson County area. We specialize in the installation of new equipment, heating and cooling repair, and furnace cleaning. Craftsmanship is important, equipment choice is too. We work with only top brands like Amana, Goodman, York, and McLain. It is understandable that replacing or upgrading your equipment can be daunting. Ask us about financing. We repair all heating and cooling equipment brands. Heating and cooling repairs can happen at random, take advantage of our 24-hour emergency service. Call us today about your concerns.