how to replace the blower motor resistor in Honda Accord 8th Generation (2008-2012)?

Honda Accord 9th Generation (2013-2017)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

456 words

Problem Statement

Learn how to replace the blower motor resistor in a 2008-2012 Honda Accord. Step-by-step guide with symptoms, diagnostic steps, and tools required.

Affected Component

HVAC

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical components to prevent shock.
•Allow the vehicle to cool down before starting work on the HVAC system.

Symptoms

•Blower motor only works on certain speeds
•No airflow from the HVAC system
•Intermittent blower operation
•Unusual noises from the blower motor
•HVAC system operates erratically

Diagnostic Steps

1
Use an OBD-II scanner to check for any related trouble codes.
2
Verify that the blower motor is functioning by applying direct battery voltage to it.
3
Inspect the wiring harness and connectors for signs of damage or corrosion.
4
Measure resistance across the blower motor resistor terminals with a multimeter.
5
Check the vehicle's fuse for the HVAC system to ensure it is not blown.

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•OBD-II scanner
•Multimeter
•Socket set
•Screwdriver set

Parts Required

•Blower motor resistor

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Diagnostic Steps

1
Use an OBD-II scanner to check for any related trouble codes.
2
Verify that the blower motor is functioning by applying direct battery voltage to it.
3
Inspect the wiring harness and connectors for signs of damage or corrosion.
4
Measure resistance across the blower motor resistor terminals with a multimeter.
5
Check the vehicle's fuse for the HVAC system to ensure it is not blown.

Solution

1. Preparation

Gather necessary tools and parts.
Disconnect the vehicle's battery to prevent electrical shock.
Ensure the vehicle is parked on a flat surface.

2. Accessing the Blower Motor Resistor

Remove the passenger side footwell cover by unscrewing any screws and unclipping it from its mounting points.
Locate the blower motor resistor, which is typically found near the blower motor itself.

3. Removing the Blower Motor Resistor

Disconnect the electrical connector from the blower motor resistor by pressing the release tab and pulling it out.
Remove the mounting screws (usually 2-3 screws) holding the blower motor resistor in place using a socket set.
Carefully pull the resistor out of its housing.

4. Installing the New Blower Motor Resistor

Position the new blower motor resistor into the housing, ensuring it seats properly.
Reinstall the mounting screws and tighten them to the manufacturer's specifications (typically around 5-7 ft-lbs).
Reconnect the electrical connector to the new resistor.

5. Reassembly

Reattach the passenger side footwell cover and secure it with screws.
Reconnect the vehicle's battery.