how to fix the AC not cooling in my Tesla Model S Plaid/Refresh (2021-present)

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

544 words

Problem Statement

Learn how to diagnose and fix AC not cooling in Tesla Model S Plaid. Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

HVAC

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems.
•Follow proper procedures when handling refrigerant to avoid exposure.

Symptoms

•Weak or no cold air blowing from the AC vents
•Increased cabin temperature despite AC being turned on
•Unusual noises coming from the AC unit
•Air conditioning system running continuously without cooling effect
•"Climate Control" warning or error message on the display

Diagnostic Steps

1
Check the AC system settings on the touchscreen to ensure it’s set to "Cool" and not "Auto" or "Off".
2
Inspect the cabin air filter for clogs or blockages; replace if necessary.
3
Use the Tesla diagnostic tool to scan for any error codes related to the HVAC system.
4
Verify refrigerant levels by checking the AC system pressure.
5
Inspect the AC compressor for any signs of damage or failure.
6
Check for any visible leaks around the AC lines or connections.

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

•Screwdriver
•Refrigerant recharge kit
•Gauge set
•Socket set
•Wrenches

Parts Required

•Cabin air filter
•Refrigerant
•AC compressor (if needed)

Related Faults

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Diagnostic Steps

1
Check the AC system settings on the touchscreen to ensure it’s set to "Cool" and not "Auto" or "Off".
2
Inspect the cabin air filter for clogs or blockages; replace if necessary.
3
Use the Tesla diagnostic tool to scan for any error codes related to the HVAC system.
4
Verify refrigerant levels by checking the AC system pressure.
5
Inspect the AC compressor for any signs of damage or failure.
6
Check for any visible leaks around the AC lines or connections.

Solution

1. Preparation

Gather necessary tools and parts.
Park the vehicle in a well-ventilated area and allow the engine to cool if necessary.
Disconnect the vehicle’s battery to ensure safety while working with electrical components.

2. Replace Cabin Air Filter

Tools Required: Screwdriver, new cabin air filter.
Sub-steps:
1. Locate the cabin air filter compartment (usually under the dashboard).
2. Remove the screws or clips securing the compartment cover.
3. Carefully pull out the old cabin air filter.
4. Insert the new filter, ensuring it is oriented correctly.
5. Reattach the compartment cover and secure with screws or clips.

3. Recharge Refrigerant

Tools Required: Refrigerant recharge kit, gauge set.
Sub-steps:
1. Connect the gauge set to the service ports of the AC system.
2. Check the refrigerant levels; if low, proceed to recharge.
3. Follow the manufacturer's instructions to add refrigerant until the correct level is reached.
4. Disconnect the gauge set and check for leaks.

4. Inspect and Replace AC Compressor (if faulty)

Tools Required: Socket set, wrenches, new AC compressor.
Sub-steps:
1. Remove the serpentine belt from the AC compressor.
2. Disconnect electrical connections and refrigerant lines from the compressor.
3. Unbolt and remove the old compressor from its mounting bracket.
4. Install the new AC compressor, tightening bolts to manufacturer specifications.
5. Reconnect refrigerant lines and electrical connections.
6. Reinstall the serpentine belt.