When outdoor temperatures drop, you become much more reliant on your furnace, which is the heating unit that provides warm and cozy air when it’s chilly outside. Having a properly working furnace is an important part of staying comfortable during the frigid months. Learn how adjusting the blower speed on your furnace can help it continue to efficiently heat your space.
There are many reasons you may want to adjust the blowing speed of your furnace, such as:
When relying on your furnace all winter long, it’s important to have at least some understanding of its mechanics. In order to have your furnace work at its maximum capacity, you need to adjust it to the right blower speed. Follow these steps to get started:
Step 1: Determine What Speed You Want
If you find that your home or office is a bit chilly, you may want to increase the blower speed of your furnace in order to provide better airflow through the entire space. If your furnace is so loud it’s making it hard to concentrate on work or watch your favorite television show, you can decrease your blower speed to quiet the unit.
Step 2: Create a Safe Workspace
When working with any unit connected to electricity, it’s important to turn off the power to prevent electrocution and damage to your furnace. Once you cut the power, you can remove the cover of your furnace to get access to the control board.
Step 3: Adjust the Pulley on the Blower Drive Motor
Adjusting the pulley on the blower driver motor lets you increase or decrease the blower speed. Refer to your owner’s manual to find out exactly what the pulley and other applicable parts look like.
When increasing the blower speed, loosen the setscrew a little bit. This is the part that holds the pulley to the furnace’s driveshaft. Turn the pulley one rotation clockwise on the shaft. If you want even more speed, do two rotations. Finish by tightening the setscrew.
To decrease the blower speed, you do the opposite rotation. Slightly loosen the setscrew, and then turn the pulley counterclockwise one or two rotations. After, make sure to tighten the setscrew.
Step 4: Check the Alignment of Your Motor and Blower Pulley
When your furnace’s motor and blower pulley become misaligned, the unit may not work to its full capacity, making it less efficient and noisier. Check the alignment by using a carpenter’s square to see if the pulley is in a straight line and perpendicular to the motor shaft.
If you need to fix the alignment, loosen the setscrew in order to move the pulley as needed. On older furnaces, you may find that the setscrew is rusted or stuck, making it hard to loosen. In this situation, you can loosen the motor’s mounting bolts and slide the motor to align the pulleys.
Keeping an eye on your furnace is the main way you can prevent damage from thermal stress, dust, and other factors. These are a few common reasons your furnace experiences issues:
Taking care of your furnace is a crucial part of ensuring it works throughout the colder months. Follow these tips to keep your furnace working properly:
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Since you may not know the inner workings of your furnace and other electrical systems, it’s usually best to hire a professional. They can assess what’s wrong with your furnace and get it running right in no time. Here are a few common instances when you should hire a professional:
Having a professional tune up your furnace once a year is the easiest way to ensure it works properly. During their visit, the technician will inspect the unit and complete various maintenance tasks, like:
It often takes a professional to detect mechanical problems with your unit. With their expertise, they may find the following problems:
Worried your furnace isn’t meeting energy standards? Let one of our highly skilled technicians run a diagnostic test to assess the problem. Contact us today to schedule an appointment.