my Tesla Outback AC is blowing warm air how to fix it

Subaru Outback 5th Generation (2015-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

508 words

Problem Statement

Complete guide to fixing AC that blows warm air in Tesla Outback. Includes symptoms, diagnostic steps, tools required, and repair procedures.

Affected Component

HVAC

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems.
•Wear gloves and safety goggles when handling refrigerants.

Symptoms

•AC system not cooling air
•Increased cabin temperature
•Unusual noises from the AC compressor
•AC compressor not engaging
•Refrigerant leaks visible under the vehicle

Diagnostic Steps

1
Check the AC settings to ensure the system is set to 'cool' and not 'heat.'
2
Use an OBD-II scanner to check for any error codes related to the AC system.
3
Inspect the AC compressor for signs of damage or wear.
4
Check refrigerant levels using a manifold gauge set.
5
Inspect the cabin air filter for blockages or dirt.
6
Test the AC system's electrical components such as fuses and relays.

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
•Refrigerant canister

Parts Required

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

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Diagnostic Steps

1
Check the AC settings to ensure the system is set to 'cool' and not 'heat.'
2
Use an OBD-II scanner to check for any error codes related to the AC system.
3
Inspect the AC compressor for signs of damage or wear.
4
Check refrigerant levels using a manifold gauge set.
5
Inspect the cabin air filter for blockages or dirt.
6
Test the AC system's electrical components such as fuses and relays.

Solution

1. Preparation

Gather necessary tools and parts.
Park the vehicle on a level surface and engage the parking brake.
Disconnect the battery to prevent electrical shock.

2. Inspect and Replace Refrigerant

Connect Manifold Gauges: Attach the low and high-pressure gauges to the AC service ports.
Check Pressure Levels: Read the gauge values to determine if the refrigerant is low.
Add Refrigerant: If low, connect a refrigerant canister to the low-pressure port and add refrigerant according to manufacturer's specifications.
- Use R-134a or R-1234yf refrigerant as appropriate.
Monitor Gauges: Ensure pressures return to normal operating range.

3. Inspect and Replace AC Compressor

Access the AC Compressor: Remove any covers or components obstructing access.
Disconnect Electrical Connectors: Carefully unplug any electrical connections to the compressor.
Remove the Compressor: Unscrew the mounting bolts using a socket set and remove the compressor from its bracket.
Install New Compressor: Position the new AC compressor and secure it with the mounting bolts to the specified torque.
Reconnect Electrical Connectors: Ensure all connections are firmly reattached.

4. Replace Cabin Air Filter

Locate Cabin Air Filter: Typically found behind the glove compartment or under the dashboard.
Remove Filter Housing Cover: Unscrew the cover or unclip it.
Replace Filter: Take out the old filter and insert the new one, ensuring it is oriented correctly.
Reassemble Cover: Secure the filter housing cover back in place.