how to fix the AC not turning on in my Tesla Model S Original (2012-2020)

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

519 words

Problem Statement

Learn how to diagnose and fix the AC not turning on in Tesla Model S (2012-2020). 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 12V battery before working on electrical components.
•Allow the system to cool before servicing the AC components.

Symptoms

•AC system does not activate when turned on
•Strange noises or no airflow from vents
•Climate control settings not responding
•Overheating of the cabin
•Warning messages on the display related to HVAC system

Diagnostic Steps

1
Check the climate control settings on the touchscreen to ensure the AC is turned on.
2
Inspect the vehicle's software for any updates that may address HVAC issues.
3
Use the Tesla service tool to check for error codes related to the HVAC system.
4
Verify the cabin air filter for blockages or dirt that may impede airflow.
5
Inspect the AC compressor for signs of damage or wear.
6
Test the refrigerant levels using a refrigerant gauge to ensure they are within specifications.

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
•Refrigerant gauge
•Basic hand tools

Parts Required

•Cabin air filter
•Refrigerant

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Diagnostic Steps

1
Check the climate control settings on the touchscreen to ensure the AC is turned on.
2
Inspect the vehicle's software for any updates that may address HVAC issues.
3
Use the Tesla service tool to check for error codes related to the HVAC system.
4
Verify the cabin air filter for blockages or dirt that may impede airflow.
5
Inspect the AC compressor for signs of damage or wear.
6
Test the refrigerant levels using a refrigerant gauge to ensure they are within specifications.

Solution

1. Preparation

Gather tools: OBD-II scanner, refrigerant gauge, cabin air filter, and basic hand tools.
Ensure the vehicle is parked in a well-ventilated area and on a level surface.
Disconnect the 12V battery to avoid electrical shorts during repairs.

2. Update Software

Reconnect the 12V battery.
Access the touchscreen and navigate to 'Software' settings.
Check for and install any available updates.

3. Replace Cabin Air Filter

Locate the cabin air filter access panel, usually under the glove compartment.
Remove the screws or clips securing the panel.
Pull out the old cabin air filter and replace it with a new one.
Reassemble the access panel.

4. Check and Recharge Refrigerant

Connect the refrigerant gauge to the low-pressure service port.
Check pressure readings; if low, proceed to recharge.
Add the correct type of refrigerant (R134a or R1234yf as applicable) until the levels are adequate.
Disconnect the gauge and ensure the service port cap is secure.

5. Inspect and Test AC Components

Visually inspect the AC compressor and associated belts for damage.
If necessary, replace any damaged components, ensuring the AC compressor is properly secured and connected.
Reconnect the battery and test the AC operation.