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Home/Cars/Tesla/Model S/Plaid/Refresh (2021-present)/why does my Tesla Model S Original (2012-2020) AC not blowing cold air

why does my Tesla Model S Original (2012-2020) AC not blowing cold air

Tesla Model S Plaid/Refresh (2021-present)

Severity: mediumDifficulty: medium2-4 hours
3 min read
528 words

Problem Statement

Learn how to diagnose and fix AC not blowing cold air in Tesla Model S (2012-2020). Step-by-step guide with diagnostic procedures and repair instructions.

Component
HVAC
Repair Time
2-4 hours

Safety Warnings

  • ⚠Disconnect the battery before working on electrical components.
  • ⚠Always wear safety goggles and gloves when handling refrigerants.

Symptoms

  • •AC system is operational but only blows warm air
  • •Unusual noises coming from the AC compressor
  • •AC compressor not engaging
  • •Presence of refrigerant leaks (evidence of oil around AC components)
  • •AC system cycling on and off frequently

Diagnostic Steps

  1. 1Scan for error codes using an OBD-II scanner to check for any AC-related faults.
  2. 2Inspect the AC compressor for signs of wear or damage.
  3. 3Check the refrigerant level using a refrigerant gauge.
  4. 4Examine the AC condenser for obstructions or damage.
  5. 5Test the AC relay and fuses for continuity.
  6. 6Verify operation of the cabin air filter and ensure it's not clogged.

Solution

Solution

1. Preparation

  • Gather required tools and parts.
  • Disconnect the vehicle’s battery to ensure safety while working on electrical components.

2. Check Refrigerant Levels

  • Tools Required: Refrigerant gauge
  • Connect the refrigerant gauge to the low-pressure service port.
  • Check the refrigerant level; if low, add the appropriate type of refrigerant (R-134a for pre-2017 models, R-1234yf for 2017 and newer).
  • Monitor for any leaks during the process.

3. Inspect and Test AC Compressor

  • Tools Required: Multimeter
  • Locate the AC compressor and inspect for physical damage or leaks.
  • Use a multimeter to check the compressor clutch for voltage when the AC is turned on.
  • If no voltage is present, replace the AC relay or check the wiring for damage.

4. Clean or Replace AC Components

  • Tools Required: Hand tools, replacement parts
  • Clean the AC condenser with compressed air to remove any debris.
  • If the cabin air filter is clogged, replace it to ensure proper airflow.
  • If any damaged components are found (compressor, condenser), replace them accordingly.

5. Recharge the AC System

  • After repairs, recharge the AC system with the appropriate refrigerant and oil as specified in the service manual.
  • Ensure that the system is evacuated before refilling to remove any moisture.

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
  • Multimeter
  • Hand tools
  • Compressed air

Parts Required

  • Refrigerant (appropriate type)
  • AC compressor (if needed)
  • Cabin air filter (if clogged)

Additional Information

Component

HVAC

Repair Time

2-4 hours

Difficulty

medium

Severity

medium

Tools

5 items

Parts

3 items

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