Volkswagen Golf Seventh Generation (2013-2020) AC not blowing cold air how can I fix it

Volkswagen Golf Eighth Generation (2020-present)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

556 words

Problem Statement

Learn how to diagnose and fix AC not blowing cold air in Volkswagen Golf (2013-2020). Step-by-step guide with diagnostic procedures 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.
•Allow the engine to cool before starting any repairs.

Symptoms

•AC blows warm air instead of cold
•Increased cabin humidity
•Unusual noises when the AC is turned on
•AC compressor not engaging
•"AC" light on the dashboard not illuminated

Diagnostic Steps

1
Check and verify the AC system settings to ensure the AC is turned on and set to the coldest setting.
2
Use an OBD-II scanner to check for any error codes related to the HVAC system.
3
Inspect the AC refrigerant level using a manifold gauge set.
4
Examine the AC compressor for signs of damage or wear.
5
Check the AC fuse to ensure it is not blown.
6
Inspect the cabin air filter for blockage or excessive dirt.

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
•Torque wrench
•Screwdrivers
•Safety goggles
•Gloves

Parts Required

•AC refrigerant (R-134a)
•AC compressor (if needed)
•Expansion valve (if needed)
•Cabin air filter (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 and verify the AC system settings to ensure the AC is turned on and set to the coldest setting.
2
Use an OBD-II scanner to check for any error codes related to the HVAC system.
3
Inspect the AC refrigerant level using a manifold gauge set.
4
Examine the AC compressor for signs of damage or wear.
5
Check the AC fuse to ensure it is not blown.
6
Inspect the cabin air filter for blockage or excessive dirt.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a level surface with the engine off.
Disconnect the battery to ensure safety.

2. Check and Recharge AC Refrigerant

Tools Required: Manifold gauge set, refrigerant (R-134a), safety goggles, gloves.
Sub-steps:
1. Connect the manifold gauge set to the low and high-pressure service ports of the AC system.
2. Start the engine and turn the AC to the maximum setting.
3. Read the pressure on the gauges; if low, proceed to recharge.
4. Add refrigerant until the system reaches the manufacturer's recommended pressure (typically between 25-45 psi for low side and 150-250 psi for high side).
5. Monitor the gauges to ensure proper filling without overcharging.

3. Inspect and Replace AC Components (if necessary)

Tools Required: Socket set, torque wrench, screwdrivers, AC compressor or expansion valve (if needed).
Sub-steps:
1. If the compressor is not engaging, check the wiring and connectors for damage or corrosion.
2. If necessary, remove the old AC compressor by disconnecting the electrical connector, unbolting the compressor from its mount, and removing the refrigerant lines (ensure refrigerant is properly recovered).
3. Install the new compressor by reversing the removal steps, ensuring all connections are secure and torqued to specifications.
4. If the expansion valve is faulty, locate it (typically near the evaporator), disconnect the refrigerant lines, and replace it.

4. Reconnect Battery and Test System

Reconnect the battery and start the vehicle.
Turn on the AC and check for cold air blowing from the vents.