Is there a fuse for the heater blower motor?

Yes, most vehicles have a fuse for the heater blower motor that controls the operation of the heating and air conditioning system. The fuse is designed to protect the electrical circuit and prevent damage to the blower motor in the event of an electrical overload or short circuit.

Understanding the Heater Blower Motor Fuse

The heater blower motor is a crucial component of a vehicle's heating and air conditioning system. It is responsible for circulating the heated or cooled air throughout the cabin. To ensure the proper and safe operation of the blower motor, it is typically protected by a fuse located in the vehicle's fuse box.

The fuse acts as a safety device, interrupting the flow of electricity to the blower motor if there is an electrical issue, such as a short circuit or an overload. This prevents damage to the blower motor and other electrical components in the system.

Locating the Heater Blower Motor Fuse

• The fuse for the heater blower motor is usually located in the vehicle's main fuse box, which is typically found in the engine compartment or under the dashboard.


• Consult your vehicle's owner's manual or the fuse box diagram to identify the specific fuse that controls the heater blower motor.


• The fuse may be labeled as "Blower Motor," "HVAC," or something similar.

If you are unsure about the location or identification of the heater blower motor fuse, it is best to consult a professional mechanic or refer to your vehicle's service manual for guidance.

Checking and Replacing the Fuse

• To check the fuse, locate it in the fuse box and visually inspect it for any signs of damage or a broken filament.


• If the fuse appears to be blown, replace it with a new fuse of the same amperage rating as specified in the owner's manual or fuse box diagram.


• After replacing the fuse, turn on the heater or air conditioning system to ensure the blower motor is functioning properly.


• If the new fuse blows immediately or the blower motor still does not work, there may be an underlying electrical issue that requires further diagnosis and repair by a qualified mechanic.

Regularly checking and maintaining the heater blower motor fuse is an important part of vehicle maintenance to ensure the proper operation of the heating and air conditioning system.

Where is the fuse for the heater blower motor?

The heater blower motor fuse is usually located in one of the vehicle's fuse boxes, either under the dashboard, typically near the steering wheel, or under the hood in the engine compartment. To find the exact location and fuse number, consult your vehicle's owner's manual or look for a diagram on the fuse box cover. Many cars have a separate fuse under the hood and one inside the cabin.
 
This video shows how to find the fuse box under the hood and check the fuse: 56sQuiteAlrightYouTube · Mar 15, 2022

• Check the owner's manual: This is the most reliable way to find the exact location, as it will have a detailed diagram of all fuses and their functions. 
• Locate the fuse box(es): Look for a fuse box under the dashboard near the steering wheel and another one in the engine bay under the hood. 
• Find the fuse diagram: Open the fuse box and look for a diagram on the inside of the cover. This will show you which fuse corresponds to the blower motor. 
• Identify the correct fuse: The diagram will specify the fuse number and amperage for the blower motor. It is often a 20, 25, or 30-amp fuse, but this can vary by vehicle. 

You can watch this video to see how to test the fuse: 43sCarSpyTVYouTube · Mar 14, 2025

How do I reset my heater blower?

Learning how to reset your furnace blower motor is relatively simple, but there are a few steps to follow:

1. Step 1: Turn Off the Power.
2. Step 2: Inspect the Blower Motor.
3. Step 1: Locate the Furnace Blower Motor Reset Button.
4. Step 2: Press and Hold the Reset Button.
5. Step 3: Check the Circuit Breaker.

How to tell if a blower fuse is blown?

You can tell if a blower motor fuse is blown by visually inspecting it for a broken metal strip or cloudy/charred appearance, or by using a multimeter to check for continuity. A good fuse will show continuity (a closed circuit), while a blown fuse will have an open circuit and no continuity. If you don't have a multimeter, you can use a test light to check for power on both sides of the fuse when the ignition is on.
 
This video demonstrates how to inspect a fuse for a broken metal strip: 1mCarSpyTVYouTube · Mar 14, 2025
Visual inspection

• Locate the fuse: Find the correct fuse in your vehicle's fuse box by checking the owner's manual or the fuse box cover for a label like "Blower," "AC," or "HVAC". 
• Remove the fuse: Gently pull the fuse straight out using your fingers or a fuse puller. 
• Inspect the metal strip: Look inside the fuse for a thin metal wire that runs between the two metal prongs. If this wire is broken or missing, the fuse is blown. 
• Check for discoloration: A blown fuse may also have a cloudy or charred appearance, or a dark smudge on the small window on top. 

Using a multimeter

• Set your multimeter: Switch your multimeter to the continuity or resistance setting. A continuity test will beep if the circuit is closed. 
• Connect the probes: Touch the multimeter's probes to the metal contact points on both sides of the fuse. 
• Read the results: A good fuse will show continuity (it will beep on the continuity setting) or a very low resistance value, indicating a complete circuit. A blown fuse will show an "open" or "OL" reading, meaning there is no continuity. 

You can watch this video to learn how to test a fuse for continuity using a multimeter: 59sHVAC SchoolYouTube · Apr 19, 2021
Using a test light

• Connect the test light: Clip the test light's ground clip to a metal part of the car's chassis or the negative battery terminal. Leave the probe free. 
• Turn on the car: Turn the ignition key to the "on" position and turn on the blower fan to power the circuit. 
• Test the fuse: Touch the test light's probe to the metal part on each side of the fuse. 
• Read the results: If the test light illuminates when touching both sides of the fuse, it's good. If the light only comes on when touching one side, the fuse is blown. 

Can a fuse cause a blower motor not to work?

One of the most prevalent factors that can cause a blower motor to stop working is a blown fuse. A fuse prevents electrical circuits from an excessive flow of current that may run in them. Over time or due to any sudden surge, it might blow the fuse and cut power to the blower motor.