why does my Tesla Outback 5th Generation (2015-2019) blower motor only work on high speed

Subaru Outback 5th Generation (2015-2019)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

479 words

Problem Statement

Learn how to diagnose and fix the blower motor issue in Tesla Outback (2015-2019) that only works on high speed. Step-by-step guide included.

Affected Component

HVAC

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect battery before working on electrical components.
•Ensure the vehicle is off and cool before beginning repairs.

Symptoms

•Blower motor functions only at high speed
•Inability to adjust blower speed to low or medium settings
•Possible whistling noise when blower is set to high
•No unusual smells or burning odors from the dashboard area
•Dashboard climate control settings appear functional but ineffective

Diagnostic Steps

1
Scan the vehicle’s computer for any error codes related to the HVAC system using an OBD-II scanner.
2
Inspect the blower motor resistor for visible damage or corrosion.
3
Test the blower motor with a multimeter to check for proper voltage and resistance.
4
Examine the wiring harness connected to the blower motor and resistor for any signs of wear or damage.
5
Check the climate control module for any faults or malfunction by accessing it through the vehicle’s diagnostic menu.
6
Verify that the cabin air filter is clean and not obstructing airflow.

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

Related Faults

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Diagnostic Steps

1
Scan the vehicle’s computer for any error codes related to the HVAC system using an OBD-II scanner.
2
Inspect the blower motor resistor for visible damage or corrosion.
3
Test the blower motor with a multimeter to check for proper voltage and resistance.
4
Examine the wiring harness connected to the blower motor and resistor for any signs of wear or damage.
5
Check the climate control module for any faults or malfunction by accessing it through the vehicle’s diagnostic menu.
6
Verify that the cabin air filter is clean and not obstructing airflow.

Solution

1. Preparation

Gather necessary tools and parts.
Disconnect the vehicle battery to ensure safety during repair.
Allow the vehicle to cool if recently operated.

2. Remove the Blower Motor Resistor

Locate the blower motor resistor, typically found behind the glove box.
Remove the glove box or any panels obstructing access to the resistor.
Disconnect the electrical connector from the resistor.
Unscrew the mounting screws of the resistor using a socket set.
Remove the resistor from its housing.

3. Replace the Blower Motor Resistor

Compare the old resistor with the new one to ensure compatibility.
Install the new resistor into the housing and secure it with screws.
Reconnect the electrical connector ensuring it clicks into place.

4. Reassemble and Test

Reinstall any panels or the glove box removed during the process.
Reconnect the vehicle battery.
Start the vehicle and test the blower motor at various speeds to confirm functionality.