how to fix the rear defroster not working in Tesla Outback 5th Generation (2015-2019)?

Subaru Outback 5th Generation (2015-2019)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

515 words

Problem Statement

Learn how to diagnose and fix the rear defroster not working in Tesla Outback 2015-2019. Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

HVAC

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems to avoid electrical shock or short circuits.

Symptoms

•Rear defroster indicator light does not illuminate
•Rear window remains foggy or frosted
•No warmth felt on the rear window when defroster is activated
•Other defrosting functions (front defroster, cabin heater) are operational
•Potential error messages related to rear window heating on the display

Diagnostic Steps

1
Check the operation of the rear defroster switch on the dashboard for any signs of malfunction.
2
Inspect the rear defroster grid for visible damage or breaks in the heating elements.
3
Use a multimeter to test for continuity in the defroster grid.
4
Inspect the fuse related to the rear defroster in the fuse box for any blown fuses.
5
Scan the vehicle's onboard diagnostics (OBD-II) for any related error codes.

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

•Multimeter
•Fuse puller or pliers
•Rear defroster repair kit (conductive paint)
•Safety glasses

Parts Required

•Replacement fuse (10-20A as needed)

Related Faults

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Symptoms

•Rear defroster indicator light does not illuminate

•Rear window remains foggy or frosted

•No warmth felt on the rear window when defroster is activated

•Other defrosting functions (front defroster, cabin heater) are operational

•Potential error messages related to rear window heating on the display

Diagnostic Steps

1
Check the operation of the rear defroster switch on the dashboard for any signs of malfunction.
2
Inspect the rear defroster grid for visible damage or breaks in the heating elements.
3
Use a multimeter to test for continuity in the defroster grid.
4
Inspect the fuse related to the rear defroster in the fuse box for any blown fuses.
5
Scan the vehicle's onboard diagnostics (OBD-II) for any related error codes.

Solution

1. Preparation

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

2. Inspect and Repair the Defroster Grid

Sub-steps:
1. Remove any rear window tinting or covering that may be obstructing visibility.
2. Visually inspect the rear defroster grid for breaks or damage.
3. If breaks are found, use a rear defroster repair kit to apply conductive paint to the damaged areas.
4. Allow the repair to cure as per the kit instructions (usually about 30 minutes).

3. Check and Replace the Fuse

Sub-steps:
1. Locate the fuse box, typically found under the dashboard or in the engine compartment.
2. Identify the fuse for the rear defroster (refer to the owner's manual for the exact location).
3. Remove the fuse using a fuse puller or pliers.
4. Inspect the fuse for any visible signs of damage or a broken filament.
5. Replace with a new fuse of the same amperage (usually around 10-20A).
6. Reconnect the battery.

4. Test the Defroster Function

Sub-steps:
1. Start the vehicle and activate the rear defroster.
2. Monitor the indicator light to ensure it illuminates.
3. Check for warmth on the rear window within a few minutes.