Furnace Blower Not Working? Most Common Causes & How To Fix


When our furnace blower isn’t working, it can be a major inconvenience. It disrupts the heating and cooling process in our home, making us uncomfortable.

The blower is responsible for circulating the heated or cooled air throughout our space. There are several common issues that can cause the blower to stop working, such as a faulty motor or control board, clogged air filters, or tripped circuit breakers.

We’ll go through troubleshooting steps to resolve the problem and offer tips to prevent future issues in your furnace.

Troubleshooting Steps

To troubleshoot why your furnace blower is not working, start by checking the thermostat settings and ensuring that the blower motor is receiving power.

First, make sure the thermostat is set to ‘heat’ mode and that the temperature is set higher than the current room temperature.

Next, check if there are any electrical issues with the blower motor. Inspect the circuit breaker or fuse box to see if a switch has been tripped or a fuse blown.

If everything seems fine, move on to checking for an air filter clog. A dirty or clogged air filter can restrict airflow and cause the blower to malfunction.

Possible Causes

Check if the thermostat is set correctly and if the circuit breaker for your HVAC system has tripped.

When it comes to furnace blower problems, there are a few common issues that could be causing the motor not to work properly. One sign of a bad blower motor is if you hear strange noises coming from the fan or if it’s not blowing out warm air.

Another problem could be a faulty capacitor, which can be easily replaced by an HVAC technician. If your blower motor needs repair or replacement, it’s important to consider the cost of a new motor and any associated labour costs.

To prevent future issues, make sure to regularly maintain your furnace blower by cleaning or replacing the air filter and scheduling regular maintenance with a professional HVAC company.

To Get a Same-Day Furnace Inspection, Reach Out Now:

(647) 972-8714

Motor Issues

If you’re experiencing issues with your motor, one possible cause could be a faulty capacitor that needs to be replaced by an HVAC technician.

Motor maintenance is crucial for the smooth operation of your furnace blower. Regular lubrication of the motor can help reduce friction and noise while improving efficiency.

If you notice any unusual noises coming from the motor, it’s important to troubleshoot the problem promptly. This can include checking for loose or worn-out parts and tightening them if necessary.

In some cases, a blower motor replacement may be required if the motor is damaged beyond repair.

Additionally, a malfunctioning motor capacitor can also lead to motor issues and should be addressed by a professional technician as soon as possible to ensure the proper functioning of your furnace blower.

Electrical Problems

When troubleshooting electrical problems, we should first ensure that the circuit breaker is not tripped and that the control board is functioning properly.

If the furnace blower is malfunctioning, there could be several possible causes. One common issue is motor problems. The blower motor may be faulty or it could be a problem with the motor bearings.

Another potential cause could be a clogged air filter, which can restrict airflow and cause the blower to malfunction. Additionally, incorrect thermostat settings can also prevent the blower from running properly.

To troubleshoot these issues, we recommend checking the circuit breaker, inspecting the control board for any faults, replacing a faulty blower motor if necessary, cleaning or replacing a clogged air filter, and adjusting thermostat settings as needed.

Alp Heating Service Car

Brrr! Why is it Still Cold in Your House? Your Furnace Fan May Be Broken

Don’t let a faulty furnace blower leave you out in the cold this winter. A broken fan prevents heated air from circulating, making it feel like your furnace isn’t working. Our techs can quickly diagnose and repair your blower to get warmth flowing again.

(647) 972-8714
Schedule Furnace Blower Repair

Clogged Air Filter

One possible cause for a clogged air filter is restricted airflow, which can lead to blower malfunctions. Regular air filter maintenance is crucial to ensure proper airflow and prevent issues with the furnace blower.

As HVAC technicians, we recommend checking and replacing the air filter regularly as part of your furnace maintenance checklist. A dirty or clogged air filter restricts the flow of air, putting strain on the blower motor. Over time, this can lead to decreased performance and even cause the blower motor to fail.

If you notice reduced airflow or unusual noises coming from your furnace, it may be necessary to replace the blower motor due to an airflow restriction caused by a clogged filter.

Thermostat Settings

Thermostat Settings - One Of The Possible Causes According To Alp Heating'S Guide To Troubleshooting Why Blower Not Working On Furnace

To ensure optimal heating and cooling, you should adjust your thermostat settings according to your comfort preferences.

If you’re experiencing issues with your furnace blower not working, it’s important to check your thermostat settings as part of the troubleshooting process.

Start by ensuring that the thermostat is programmed correctly and compatible with your HVAC system.

Check the wiring connections to make sure they are secure and properly connected.

Additionally, calibration of the thermostat may be necessary to ensure accurate temperature readings.

If you’re unsure about any of these steps, it’s always best to consult a professional HVAC technician who can help diagnose and resolve any thermostat-related issues.

Properly functioning thermostat settings are crucial for maintaining a comfortable indoor environment.

Faulty Control Board

If your control board is faulty, you may experience issues with the operation of your HVAC system. The control board plays a crucial role in regulating and coordinating the various functions of your furnace, blower motor, and other components.

When the control board is not working properly, it can lead to a range of problems such as inconsistent heating or cooling, failure to start or stop the blower fan, or even complete system shutdown.

Troubleshooting the control board involves checking for any visible signs of damage or loose connections, as well as testing its electrical components. If necessary, a control board replacement may be required to resolve these issues and restore optimal functionality to your HVAC system.

Blower Fan Not Spinning

Check if your blower fan is spinning to ensure proper airflow in your HVAC system. If you notice that the blower fan is not spinning, it could indicate a furnace blower motor failure.

There are several possible causes for this issue, including a blower wheel obstruction, faulty motor capacitor, improper voltage supply, or worn-out blower bearings.

A blower wheel obstruction can prevent the fan from spinning freely, while a faulty motor capacitor may result in insufficient power to start the motor. Additionally, an improper voltage supply or worn-out blower bearings can also lead to the blower fan not spinning.

It is important to address these issues promptly to restore the proper functioning of your HVAC system and maintain optimal airflow throughout your home.

Airflow Obstructions

There might be something blocking the airflow in our HVAC system.

When it comes to a furnace blower not working, several issues can cause this problem. One possible reason is improper installation, which can lead to restricted air ducts or an incorrect voltage supply.

Another common culprit is a dirty blower wheel, which can hinder proper airflow and prevent the blower from functioning correctly. Additionally, a faulty limit switch can also cause the blower to stop working.

To resolve these issues, it’s essential to have a professional HVAC technician inspect and address any obstructions or malfunctions in the system. By identifying and resolving these problems, we can restore proper airflow and ensure the efficient operation of our furnace blower.

Lack of Maintenance

To keep your HVAC system running smoothly, make sure to regularly maintain and clean the components responsible for distributing warm air throughout your home.

Neglecting maintenance can lead to a variety of issues, including a lack of airflow from your furnace blower. One common cause of this problem is a dirty blower. Over time, dust and debris can accumulate on the blower wheel, reducing its efficiency and restricting airflow.

Another potential culprit could be a worn-out belt that connects the blower motor to the fan. If the belt becomes loose or breaks, it can prevent the blower from operating properly.

Additionally, a faulty motor capacitor can lead to inadequate airflow as it affects the performance of the blower motor.

Lastly, blocked air vents can restrict the flow of warm air into your home, causing poor heating efficiency.

Regular maintenance and cleaning are essential in preventing these issues and ensuring optimal performance of your HVAC system.

Furnace Blower Problems? Some FAQs

(647) 972-8714

How do I know if my furnace blower is not working?

If your furnace blower is not working, there are a few troubleshooting tips you can try. Signs of a faulty blower include no air blowing or weak airflow. If these steps don’t solve the issue, it’s important to call a professional for assistance. Regular blower maintenance and inspections are also crucial to ensure optimal performance.

Can motor issues affect the functioning of the furnace blower?

Yes, motor issues can affect the functioning of the furnace blower. Regular motor maintenance is crucial. Signs of motor damage include strange noises or decreased airflow. Motor replacement options and repair costs vary depending on the severity of the issue.

What are some electrical problems that can cause the furnace blower to stop working?

Electrical troubleshooting is essential when a furnace blower stops working. Motor malfunctions, thermostat malfunctions, and circuit breaker issues can all cause the blower to cease functioning. Regular blower maintenance helps prevent these problems.

How does a clogged air filter impact the performance of the furnace blower?

A clogged air filter can significantly impact the performance of the furnace blower. It restricts airflow, causing the blower to work harder and potentially overheat. This leads to decreased efficiency, increased energy consumption, and potential damage to the blower motor. Regularly changing air filters is crucial for optimal furnace performance.


In conclusion, when your furnace blower is not working, it can be a frustrating and inconvenient problem. However, by following the troubleshooting steps outlined in this article and addressing possible causes such as motor issues, electrical problems, clogged air filters, and faulty control boards, you can often resolve the issue on your own.

It’s important to prioritize regular maintenance to prevent blower problems and ensure optimal performance of your furnace. If all else fails, don’t hesitate to call a professional HVAC technician for assistance. Stay comfortable!

Furnace Blower Issue? Same-Day Service Can Get It Fixed

ALP Heating is committed to providing the finest service possible to important areas. We are delighted to be your go-to cooling and heating business for all of your requirements. Because of our commitment to perfection.

King City
North York

You might also like

his image serves as an illustration to help you understand the reasons why your furnace may be tripping your circuit breaker. A tripped circuit breaker can disrupt your heating system and leave you in the cold. At ALP Heating, we specialize in diagnosing and resolving these issues efficiently.

Why Is My Furnace Tripping Circuit Breaker? (Reasons & Solutions)

If our furnace keeps tripping the circuit breaker, there might be an underlying issue that needs attention. There are a few potential causes for this problem. One possibility is a ... Read more
This image shows how to diagnose and address a seized furnace inducer motor, ensuring efficient heating system performance.

Furnace Inducer Motor Seized – Troubleshooting & Replacement

Are you experiencing issues with your furnace inducer motor? We’ve got you covered. In this article, we’ll walk you through the signs, causes, and troubleshooting steps for a seized furnace ... Read more
This image captures a furnace thermostat displaying a high temperature reading, indicating a potential issue with overheating. Overheating in your furnace can lead to various problems, including reduced efficiency and even safety hazards. It's crucial to address this issue promptly to prevent further damage and ensure your home's comfort and safety. Whether it's a malfunctioning thermostat or a more complex furnace problem, our expert technicians at ALP Heating are here to diagnose and resolve the issue. Trust us to keep your furnace running efficiently and safely. Contact us today for reliable furnace maintenance and repair services.

Why Furnace Is Overheating And How To Fix It

Are you wondering why your furnace is overheating and how to fix it? Well, we’ve got you covered. In this article, we’ll delve into the causes and consequences of furnace ... Read more