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Home/Cars/Tesla/Model S/Plaid/Refresh (2021-present)/my Tesla Model S has a strange smell when I turn on the heater what's that

my Tesla Model S has a strange smell when I turn on the heater what's that

Tesla Model S Plaid/Refresh (2021-present)

Severity: mediumDifficulty: medium1-2 hours
3 min read
516 words

Problem Statement

Learn how to diagnose and fix the strange smell when the heater is activated in Tesla Model S. Step-by-step guide with symptoms, diagnostics, and repair instructions.

Component
HVAC
Repair Time
1-2 hours

Safety Warnings

  • ⚠Disconnect the 12V battery before working on electrical components.
  • ⚠Allow the engine to cool before inspecting the heating system to avoid burns.

Symptoms

  • •Unpleasant odor when the heater is turned on
  • •Possible burning smell
  • •Reduced airflow from the heater vents
  • •Moisture accumulation on windows
  • •Unusual noises from the heater system

Diagnostic Steps

  1. 1Inspect the cabin air filter for dirt or debris blockage.
  2. 2Check for any visible leaks or coolant issues in the heating system.
  3. 3Scan for any error codes related to the HVAC system using the vehicle’s diagnostic interface.
  4. 4Examine the heater core for signs of coolant leaks or corrosion.
  5. 5Look for foreign objects or debris in the heater vents.

Solution

Solution

1. Preparation

  • Gather necessary tools and parts.
  • Ensure the vehicle is parked on a flat surface and turn off the vehicle.
  • Disconnect the 12V battery for safety.

2. Replace Cabin Air Filter

  1. Open the front trunk and locate the cabin air filter compartment.
  2. Remove the access panel by unscrewing it (if applicable) or unclipping it.
  3. Take out the old cabin air filter and inspect it for dirt or odor retention.
  4. Insert a new cabin air filter, ensuring it is oriented correctly according to airflow direction.
  5. Reattach the access panel securely.

3. Inspect and Clean Heater Vents

  1. Use a vacuum with a brush attachment to clean any debris from the heater vents.
  2. If necessary, use an air compressor to blow out any remaining dust or debris from the vents.
  3. Wipe the interior of the vents with a damp cloth and mild cleaning solution.

4. Check and Clean Heater Core

  1. If the smell persists, locate the heater core, typically found behind the dashboard.
  2. Inspect for any visible leaks or corrosion.
  3. Flush the heater core with a cleaning solution to remove any build-up.
  4. Refill the cooling system with proper coolant as per manufacturer specifications.

5. Reconnect Battery and Test

  1. Reconnect the 12V battery.
  2. Start the vehicle and test the heater to ensure proper operation and absence of odor.

Tools Required:

  • Screwdriver set
  • Vacuum with brush attachment
  • Air compressor (optional)
  • Cleaning solution for vents

Parts Required:

  • Cabin air filter
  • Heater core cleaning solution (if needed)

Estimated Repair Time: 1-2 hours

Safety Warnings:

  • Disconnect the 12V battery before working on electrical components.
  • Allow the engine to cool before inspecting the heating system to avoid burns.

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

  • Screwdriver set
  • Vacuum with brush attachment
  • Air compressor (optional)
  • Cleaning solution for vents

Parts Required

  • Cabin air filter
  • Heater core cleaning solution (if needed)

Additional Information

Component

HVAC

Repair Time

1-2 hours

Difficulty

medium

Severity

medium

Tools

4 items

Parts

2 items

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