Volkswagen Golf Seventh Generation (2013-2020) AC not working properly how to troubleshoot

Volkswagen Golf Eighth Generation (2020-present)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

4 min read

629 words

Problem Statement

Learn how to troubleshoot and fix AC issues in Volkswagen Golf (2013-2020). Step-by-step guide with 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 components.
•Handle refrigerants with care and follow safety guidelines to avoid inhalation or skin contact.

Symptoms

•AC not blowing cold air
•Unusual noises from the AC compressor
•Frequent cycling of the AC compressor
•Foul odor from the AC vents
•AC system not engaging when turned on
•Increased cabin humidity

Diagnostic Steps

1
Check the AC system settings to ensure it is properly set to 'cool' and the temperature is appropriately adjusted.
2
Inspect the AC compressor for visible signs of damage or leaks.
3
Use an OBD-II scanner to check for any error codes related to the AC system.
4
Verify the refrigerant level using a manifold gauge set to determine if it's low or overcharged.
5
Inspect the cabin air filter to see if it is clogged or dirty.
6
Check the AC electrical connections and fuses for continuity and proper operation.

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
•Vacuum pump
•Screwdriver
•Socket set
•Torque wrench

Parts Required

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

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Diagnostic Steps

1
Check the AC system settings to ensure it is properly set to 'cool' and the temperature is appropriately adjusted.
2
Inspect the AC compressor for visible signs of damage or leaks.
3
Use an OBD-II scanner to check for any error codes related to the AC system.
4
Verify the refrigerant level using a manifold gauge set to determine if it's low or overcharged.
5
Inspect the cabin air filter to see if it is clogged or dirty.
6
Check the AC electrical connections and fuses for continuity and proper operation.

Solution

1. Preparation

Gather necessary tools and parts.
Disconnect the battery to ensure safety during the repair process.
Allow the engine to cool before working on the AC system.

2. Recharge Refrigerant

Tools Required: Manifold gauge set, refrigerant canister, vacuum pump.
Connect the manifold gauge set to the AC service ports.
Start the engine and turn on the AC to the maximum setting.
Check the low and high-pressure readings on the gauges; refer to the vehicle’s specifications for normal operating ranges.
If refrigerant is low, attach the refrigerant canister to the low-pressure side and slowly add refrigerant until the correct level is achieved.
Monitor gauge readings to ensure proper filling.

3. Replace Cabin Air Filter

Tools Required: Screwdriver (if needed).
Locate the cabin air filter access panel (usually behind the glove box).
Remove the access panel and carefully take out the old cabin air filter.
Inspect the filter compartment for debris and clean if necessary.
Install the new cabin air filter in the correct orientation.
Reattach the access panel.

4. Repair or Replace AC Compressor

Tools Required: Socket set, torque wrench, AC compressor replacement kit.
Disconnect the electrical connector from the AC compressor.
Remove the serpentine belt from the compressor pulley.
Unscrew the mounting bolts and remove the compressor from its bracket.
Install the new or refurbished AC compressor, ensuring all seals are properly seated.
Torque the bolts to the manufacturer’s specifications.
Reconnect the electrical connector and reinstall the serpentine belt.

5. Test the System

Reconnect the battery and start the engine.
Turn on the AC and monitor for proper operation, including temperature and airflow.
Check for any leaks around the compressor and fittings using a leak detection solution.