why does my Tesla Model S Plaid/Refresh (2021-present) make a hissing noise when parked

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

544 words

Problem Statement

Learn how to diagnose and fix the hissing noise when parked in Tesla Model S Plaid. Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Cooling System

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Allow the vehicle to cool before working on the cooling system to avoid burns.

Symptoms

•Hissing noise audible when parked
•No warning lights illuminated on the dashboard
•Noise persists for a few minutes after turning off the vehicle
•No noticeable loss of power or performance
•No fluid leaks observed underneath the vehicle

Diagnostic Steps

1
Inspect for Cooling System Activity: Check if the noise coincides with the cooling system operation, which may activate after the vehicle is turned off.
2
Use Tesla App for Diagnostics: Check the Tesla mobile app for any alerts or notifications related to the vehicle's systems.
3
Listen for Location of Noise: Determine the source of the hissing noise by listening closely around the front of the vehicle, especially near the battery and HVAC systems.
4
Check Battery Cooling System: Inspect the battery cooling system for any potential issues, including the coolant pump operation.
5
Visual Inspection for Damaged Components: Inspect hoses, seals, and connections related to the cooling system for any signs of wear or damage.
6
Review Service History: Check if there have been any recent repairs or updates that could relate to the noise.

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

•Safety glasses
•Gloves

Parts Required

•Replacement coolant hoses (if damaged)
•Replacement coolant pump (if needed)
•Tesla-approved coolant

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Diagnostic Steps

1
Inspect for Cooling System Activity: Check if the noise coincides with the cooling system operation, which may activate after the vehicle is turned off.
2
Use Tesla App for Diagnostics: Check the Tesla mobile app for any alerts or notifications related to the vehicle's systems.
3
Listen for Location of Noise: Determine the source of the hissing noise by listening closely around the front of the vehicle, especially near the battery and HVAC systems.
4
Check Battery Cooling System: Inspect the battery cooling system for any potential issues, including the coolant pump operation.
5
Visual Inspection for Damaged Components: Inspect hoses, seals, and connections related to the cooling system for any signs of wear or damage.
6
Review Service History: Check if there have been any recent repairs or updates that could relate to the noise.

Solution

1. Preparation

Tools Required: Safety glasses, gloves
Ensure the vehicle is parked on a flat surface and the ignition is off.
Gather the necessary tools for inspection.

2. Inspect Cooling System Components

Sub-steps:
1. Open the frunk (front trunk) and locate the battery cooling system components.
2. Visually inspect the coolant reservoir for proper fluid levels.
3. Check all hoses and connections for signs of leaks or wear.
4. Listen closely to the coolant pump operation; if it is making unusual sounds, it may need replacement.

3. Address Any Issues Found

Sub-steps:
1. If a coolant leak is found, replace any damaged hoses or seals as necessary.
2. If the coolant pump is malfunctioning, replace it with a new pump. Ensure proper alignment and secure all connections.
3. Refill the coolant system with Tesla-approved coolant to the recommended level.
4. Bleed the cooling system to remove any air pockets as per manufacturer instructions.

4. Test Operation

Sub-steps:
1. Start the vehicle and allow it to reach operating temperature.
2. Check if the hissing noise persists after the vehicle is parked again.
3. Monitor the coolant temperature and ensure the cooling system operates within normal parameters.