Regularly changing your furnace filter is crucial for maintaining your system’s efficiency and air quality. The filter traps dust, dirt, and debris, preventing them from entering your furnace. When clogged, it restricts airflow, making your furnace work harder, increasing energy costs, and potentially causing damage.
Not sure how to install a furnace filter? Thiele Heating & Air Conditioning is here to help! In this blog, we’ll explain how to change a furnace filter and share more about why furnace maintenance is so important not only for your heating system but for your family’s safety and comfort.
Step-by-Step: How to Install a Furnace Filter
Replacing your furnace filter is a straightforward task that can help keep your HVAC system running efficiently. Follow these steps to ensure it’s done correctly:
1. Locate the Filter
The first step is to locate the air filter in your furnace. Most furnace units have a panel where cool air enters the system. This panel is typically easy to open without tools, but if you’re having trouble, consult your furnace’s owner’s manual for detailed instructions.
The furnace filter is usually positioned right behind this panel. It’s important to know exactly where your filter is located because regularly accessing and replacing it will help maintain your furnace’s performance.
2. Check Airflow Direction
Before removing the old filter, take note of the airflow direction. The filter will have an arrow indicating which way it should face when installed. The airflow pulls air from the outside into the furnace, so the arrow should point toward the furnace.
If the filter is installed backward, it can block airflow, reduce your system’s ability to produce heated air, increase your utility bills, and even cause damage to the furnace. By paying attention to the airflow direction, you ensure that your furnace can operate as efficiently as possible.
3. Determine the Filter Size
Furnace filters come in specific sizes that match your furnace model. Before removing the old filter, check its dimensions, which are typically printed on the filter’s side. If the size isn’t clearly visible, you can measure the filter manually.
It’s important to record the dimensions for future reference. Using the wrong size filter can lead to reduced airflow or allow dust and debris to bypass the filter, potentially damaging your furnace and lowering indoor air quality.
4. Buy the Correct Filter
Once you’ve confirmed the correct size, it’s time to purchase a replacement filter. Filters are available in a range of types, from basic options to high-efficiency air filters that can reduce allergens and improve air quality.
Stick with the manufacturer’s recommendations for your furnace model to ensure optimal performance.
5. Change the Filter
Now that you’ve purchased the correct filter, it’s time to replace the old one. First, turn off your furnace for safety. Then, slide out the old filter carefully. Dispose of the old filter according to your local waste management guidelines—many areas allow disposal in regular trash, but it’s always good to check if there are any recycling options.
Before inserting the new filter, double-check the airflow direction. Insert the filter with the arrow pointing toward the furnace, ensuring a snug fit without forcing it into place.
Once the filter is securely installed, close the panel and turn your furnace back on. Make sure the system runs smoothly, and you’re done!
Warning Signs Your Furnace Air Filter Needs to Be Replaced
It’s important to keep an eye on your furnace filter and know when it’s time for a replacement. Here are some common signs that indicate your filter may need to be changed:
- Increased Energy Bills: A clogged filter makes your furnace work harder, leading to higher energy costs.
- Weak Airflow: If airflow from your vents feels weaker than usual, the filter may be blocked.
- Dust Buildup: Excess dust around your home or vents could indicate a dirty filter.
- Furnace Cycling On and Off Frequently: Restricted airflow can cause the system to overheat, leading to frequent cycling.
- Unpleasant Odors: A dirty filter can cause musty or burning smells when the furnace runs.
If you notice any of these warning signs, replacing your furnace filter as soon as possible can prevent further furnace issues and keep your home comfortable.
How Often Should You Change Your Furnace Filter?
A good rule of thumb is to check your furnace filter monthly and replace it every three months. Homes with pets, smokers, or those in high-dust areas may need more frequent changes—potentially once a month. Keeping a record of your filter changes is a great way to stay on track. You can write the date on the filter or set reminders on your phone to make sure you never miss a change.
Purchasing filters in bulk and pre-marking them with the date for the next change is another easy way to stay organized, save money, and maintain a consistent schedule.
Regular Maintenance is a Must For Your Furnace – And We Can Help
While changing your furnace filter is a task you can easily manage, other aspects of furnace maintenance are best left to a professional technician. Regular furnace tune-ups have many benefits, including maintaining your furnace’s energy efficiency and catching small issues before they turn into major problems.
It’s recommended to schedule annual maintenance in the fall to prepare your furnace for the heating season. This also allows time for any furnace repair needs or, in worst-case scenarios, installing a new furnace before the cold weather hits.
At Thiele, we offer furnace tune-up services to keep your system running efficiently. Our experienced technicians will perform a thorough check of your furnace components, including:
- Inspect and clean the blower assembly.
- Examine the combustion chamber for damage or wear.
- Inspect the pilot light (for gas furnaces) to ensure proper ignition.
- Check for carbon monoxide leaks.
- Clean and test the flame sensor for accurate function.
- Check the heat exchanger for cracks or damage.
- Test electrical connections to ensure safety and functionality.
- Lubricate moving parts to reduce wear and tear.
- Test safety controls to ensure everything is working properly.
- Calibrate your thermostat for precise temperature control.
To make furnace maintenance easier, we’ve created our Annual “Rewards” Service Agreement Maintenance Program. With this program, you’ll receive bi-annual preventive maintenance for both your furnace and air conditioner, ensuring your HVAC system runs smoothly year-round.
Members also benefit from a 15% discount on parts and repairs, priority service when you need it, and, best of all, the confidence that a well-maintained furnace is far less likely to break down.
Schedule Your Furnace Tune-Up with Thiele
Since 1883, Thiele Heating & Air Conditioning has been serving homeowners in the Indianapolis area, providing reliable and professional furnace maintenance. If you want your furnace to be there for you when the temperature drops, it’s essential to take care of it—and we make that easy and affordable.
Schedule your furnace tune-up in the Greater Indianapolis area with us today or ask about our maintenance plans. With Thiele Heating & Air Conditioning by your side, you can rest assured that your system is ready to handle whatever the winter season brings.