Volkswagen Golf Seventh Generation (2013-2020) AC blowing warm air how to fix

Volkswagen Golf Eighth Generation (2020-present)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

494 words

Problem Statement

Complete guide to fixing AC that blows warm air in Volkswagen Golf (2013-2020). 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
•Always wear safety goggles and gloves when handling refrigerants and working on the AC system

Symptoms

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

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner
2
Inspect the AC system visually for any signs of leaks, damaged hoses, or faulty components
3
Check the refrigerant levels using a refrigerant gauge to ensure they are within specification
4
Test the AC compressor by observing if it engages when the AC is turned on
5
Examine the cabin air filter for clogs that may restrict airflow
6
Inspect the AC relay and fuses to ensure they are functioning properly

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
•Refrigerant gauge
•Socket set
•Multimeter
•Screwdrivers
•Safety goggles
•Gloves

Parts Required

•AC refrigerant
•Replacement hoses or seals (if leaks are found)
•Cabin air filter (if clogged)

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner
2
Inspect the AC system visually for any signs of leaks, damaged hoses, or faulty components
3
Check the refrigerant levels using a refrigerant gauge to ensure they are within specification
4
Test the AC compressor by observing if it engages when the AC is turned on
5
Examine the cabin air filter for clogs that may restrict airflow
6
Inspect the AC relay and fuses to ensure they are functioning properly

Solution

1. Preparation

Tools Required: OBD-II scanner, refrigerant gauge, socket set, multimeter, screwdrivers, safety goggles, gloves.
Safety Warnings: Disconnect the battery before working on electrical systems.

2. Recover Refrigerant

Sub-steps:
1. Connect a refrigerant recovery machine to the AC service ports.
2. Follow the machine’s instructions to recover the existing refrigerant.
3. Ensure the system is fully evacuated to prevent contamination.

3. Repair Leaks

Sub-steps:
1. Use a UV dye or soap solution to find any leaks in the AC system.
2. Replace any damaged hoses, seals, or components identified during the inspection.
3. Tighten any loose connections to ensure they are sealed.

4. Recharge the AC System

Sub-steps:
1. Connect the refrigerant gauge to the low and high-pressure service ports.
2. Add the correct type and amount of refrigerant as specified in the vehicle manual.
3. Monitor pressures to ensure they are within the manufacturer’s specifications.

5. Test the System

Sub-steps:
1. Reconnect the battery.
2. Start the engine and turn on the AC to the maximum setting.
3. Monitor the AC performance and check for the compressor engagement.