Tesla Outback 5th Generation (2015-2019) AC not blowing cold air, how to troubleshoot?

Subaru Outback 5th Generation (2015-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

4 min read

601 words

Problem Statement

Learn how to troubleshoot and fix AC not blowing cold air in Tesla Outback 5th Generation. Step-by-step guide with diagnostic 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 components.
•Handle refrigerant carefully, as it can be hazardous if inhaled or improperly released.

Symptoms

•AC system not producing cold air
•Unusual noises from the AC compressor
•AC compressor not engaging
•Foul odors from the vents
•Increased cabin humidity

Diagnostic Steps

1
Check the AC settings to ensure it is set to the coldest temperature and the maximum fan speed.
2
Inspect the refrigerant levels using a manifold gauge set to determine if the system is low on refrigerant.
3
Scan for any error codes related to the HVAC system using an OBD-II scanner.
4
Visually inspect the AC condenser for blockages or debris that may impede airflow.
5
Test the AC compressor operation by checking the electrical connections and listening for engagement sounds.
6
Verify the cabin air filter condition and replace if necessary, as a clogged filter can restrict airflow.

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
•Basic hand tools
•Safety glasses
•Gloves

Parts Required

•Refrigerant (R134a)
•AC compressor (if replacement is necessary)
•Cabin air filter

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Diagnostic Steps

1
Check the AC settings to ensure it is set to the coldest temperature and the maximum fan speed.
2
Inspect the refrigerant levels using a manifold gauge set to determine if the system is low on refrigerant.
3
Scan for any error codes related to the HVAC system using an OBD-II scanner.
4
Visually inspect the AC condenser for blockages or debris that may impede airflow.
5
Test the AC compressor operation by checking the electrical connections and listening for engagement sounds.
6
Verify the cabin air filter condition and replace if necessary, as a clogged filter can restrict airflow.

Solution

1. Preparation

Tools Required: OBD-II scanner, manifold gauge set, basic hand tools, safety glasses, gloves.
Ensure the vehicle is parked on a level surface and turned off.
Disconnect the negative battery terminal to avoid electrical shorts.

2. Recharge the AC System

Sub-steps:
1. Connect the low and high-pressure hoses of the manifold gauge set to the respective ports on the AC system.
2. Start the vehicle and turn the AC to maximum cold and fan speed.
3. Monitor the pressure readings on the gauges; refer to manufacturer's specifications for normal ranges.
4. If the system is low on refrigerant, use the appropriate refrigerant type (e.g., R134a) to recharge the system slowly while monitoring pressures.
5. Once recharged, remove the hoses and securely replace the caps on the AC ports.

3. Inspect and Replace the AC Compressor

Sub-steps:
1. Locate the AC compressor and visually inspect it for signs of damage or leaks.
2. Disconnect the electrical connector and unscrew the mounting bolts securing the compressor.
3. Remove the old compressor and install the new unit, ensuring proper alignment.
4. Reconnect the electrical connector and torque the mounting bolts to manufacturer's specifications.
5. Reconnect the negative battery terminal.

4. Clean or Replace the Cabin Air Filter

Sub-steps:
1. Locate the cabin air filter housing, usually behind the glove compartment.
2. Remove the glove compartment to access the filter housing.
3. Remove the old filter and inspect it for dirt and debris.
4. Install a new cabin air filter, ensuring it is oriented correctly.
5. Reassemble the glove compartment.