why does my Tesla Outback 5th Generation (2015-2019) AC not blowing cold air

Subaru Outback 5th Generation (2015-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

561 words

Problem Statement

Learn how to diagnose and fix AC not blowing cold air in Tesla Outback 5th Generation. 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.
•Handle refrigerant with care to avoid injury or environmental harm.

Symptoms

•AC system blows warm air instead of cold
•Unusual noises coming from the AC compressor
•AC compressor does not engage when AC is turned on
•Foul odor coming from the vents
•Decreased airflow from the AC vents

Diagnostic Steps

1
Check the AC system settings to ensure the temperature is set to cold and the fan speed is operational.
2
Inspect the AC compressor visually to see if there is any noticeable damage or leaks.
3
Use an OBD-II scanner to check for error codes related to the AC system.
4
Verify the refrigerant level using a manifold gauge set to ensure it is not low or overcharged.
5
Inspect the cabin air filter for blockages or dirt that may restrict airflow.
6
Test the AC pressure switch to determine if it is functioning correctly.

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
•Manifold gauge set
•Socket set
•Screwdriver set

Parts Required

•Cabin air filter
•Refrigerant
•AC compressor

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Diagnostic Steps

1
Check the AC system settings to ensure the temperature is set to cold and the fan speed is operational.
2
Inspect the AC compressor visually to see if there is any noticeable damage or leaks.
3
Use an OBD-II scanner to check for error codes related to the AC system.
4
Verify the refrigerant level using a manifold gauge set to ensure it is not low or overcharged.
5
Inspect the cabin air filter for blockages or dirt that may restrict airflow.
6
Test the AC pressure switch to determine if it is functioning correctly.

Solution

1. Preparation

Gather necessary tools and parts.
Disconnect the vehicle battery to prevent electrical shorts during repair.

2. Inspect and Replace the Cabin Air Filter

Locate the cabin air filter housing (typically behind the glove box).
Remove the glove box by unscrewing the screws and unclipping it.
Take out the old cabin air filter and inspect it for dirt or blockages.
Insert a new cabin air filter, ensuring it is oriented correctly.
Reassemble the glove box.

3. Recharge the AC System

Connect the manifold gauge set to the AC service ports (high and low).
Start the vehicle and turn the AC on to the maximum setting.
Check the refrigerant pressure readings; if low, follow these sub-steps:
- Add refrigerant (R-134a or R-1234yf as specified) slowly until the correct pressure is achieved.
- Monitor the system while adding refrigerant and do not overcharge.

4. Replace the AC Compressor (if necessary)

If the compressor is not engaging:
- Disconnect the electrical connector from the compressor.
- Remove the mounting bolts using a socket set.
- Disconnect the refrigerant lines (ensure proper handling of refrigerant).
- Install the new compressor by reversing the removal steps, ensuring to torque bolts to the manufacturer's specifications.
- Recharge the AC system as described above.

5. Verify AC System Functionality

Reconnect the vehicle battery.
Start the vehicle and test the AC system for proper operation, ensuring it blows cold air.