Blower Not Kicking On Furnace – Troubleshooting Tips

Why is My Furnace Blower Not Kicking On?
Why is My Furnace Blower Not Kicking On? from

Blower Not Kicking on Furnace – Troubleshooting Tips


When your furnace blower fails to kick on, it can be quite frustrating, especially during the cold winter months. However, before calling a professional technician, there are a few troubleshooting steps you can take to identify and potentially fix the issue yourself. This article will guide you through some common causes and solutions for a blower not kicking on a furnace.

1. Check the Thermostat

The first thing to do is to check your thermostat settings. Make sure it is set to the desired temperature and set to the “Heat” mode. Also, ensure that the fan setting is set to “Auto” or “On.” If the fan setting is set to “Off,” the blower will not operate.

2. Inspect the Air Filter

A clogged or dirty air filter can restrict airflow and cause the blower to malfunction. Check the air filter and replace it if it appears dirty or clogged. Regularly replacing the air filter is essential for the efficient operation of your furnace.

3. Check the Power Supply

Ensure that the furnace is receiving power. Check the circuit breaker or fuse box to see if the breaker has tripped or a fuse has blown. If so, reset the breaker or replace the fuse. Additionally, ensure that the furnace switch is turned on.

4. Inspect the Blower Motor

If the blower motor is not running, it could be due to a faulty motor or a problem with the motor capacitor. Carefully inspect the motor for any visible signs of damage or loose connections. If you notice any issues, it is best to contact a professional technician for further assistance.

5. Check for Obstructions

Inspect the furnace and blower compartment for any obstructions that may be preventing the blower from running. Clear away any debris, such as leaves, dirt, or other objects, that may be blocking the blower motor.

6. Test the Limit Switch

The limit switch is a safety feature that detects the temperature inside the furnace. If it senses an overheating condition, it will shut off the blower to prevent damage. Check the limit switch for any signs of malfunction and replace it if necessary.

7. Check the Control Board

A faulty control board can also cause the blower not to kick on. Inspect the control board for any visible signs of damage or loose wires. If you suspect a problem with the control board, it is best to seek professional help.

8. Call a Professional Technician

If you have followed all the troubleshooting steps and the blower still does not kick on, it is time to call a professional HVAC technician. They have the expertise and tools to diagnose and fix complex furnace issues.


A blower not kicking on a furnace can be a frustrating problem, but by following these troubleshooting tips, you may be able to identify and resolve the issue yourself. Remember to always prioritize safety, and if you are unsure or uncomfortable with any step, it is best to seek professional assistance. A properly functioning blower is crucial for the efficient operation of your furnace and ensuring a warm and comfortable home.