Volkswagen Golf Seventh Generation (2013-2020) air conditioning not working at all what's wrong

Volkswagen Golf Eighth Generation (2020-present)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

582 words

Problem Statement

Learn how to diagnose and fix the air conditioning not working in Volkswagen Golf VII (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 components.
•Use appropriate safety gear when handling refrigerants.

Symptoms

•No cold air from the AC vents
•AC compressor not engaging
•Unusual noises from the AC system when activated
•Warm air blowing out of vents despite AC being on
•AC warning light not illuminated

Diagnostic Steps

1
Check the AC system for any visible leaks or signs of damage.
2
Use an OBD-II scanner to check for any related error codes in the climate control system.
3
Test the AC compressor relay to ensure it is functioning correctly.
4
Inspect the AC fuse for continuity and replace if blown.
5
Measure refrigerant pressure using a gauge to determine if the system is adequately charged.
6
Check the cabin air filter to ensure it is not clogged.

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
•Multimeter
•Refrigerant gauge set
•Fuse puller or pliers
•Screwdriver set

Parts Required

•AC fuse (if blown)
•AC compressor relay (if faulty)
•Refrigerant (appropriate type for the vehicle)
•Cabin air filter (if clogged)

Related Faults

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Diagnostic Steps

1
Check the AC system for any visible leaks or signs of damage.
2
Use an OBD-II scanner to check for any related error codes in the climate control system.
3
Test the AC compressor relay to ensure it is functioning correctly.
4
Inspect the AC fuse for continuity and replace if blown.
5
Measure refrigerant pressure using a gauge to determine if the system is adequately charged.
6
Check the cabin air filter to ensure it is not clogged.

Solution

1. Preparation

Gather tools and parts needed.
Ensure the vehicle is parked on a level surface with the engine off.
Disconnect the battery to prevent electrical shock.

2. Inspect and Replace AC Fuse

Locate the fuse box (usually under the dashboard or in the engine compartment).
Identify the fuse related to the AC system using the diagram on the fuse box cover.
Remove the fuse with a fuse puller or pliers and check for continuity.
If the fuse is blown, replace it with a new fuse of the same amperage.

3. Test and Replace AC Compressor Relay

Locate the AC compressor relay in the fuse box.
Remove the relay and test it for continuity with a multimeter.
If the relay is faulty, replace it with a new one.

4. Check and Recharge Refrigerant

Connect a refrigerant gauge set to the low and high-pressure service ports.
Check the pressure readings against the manufacturer's specifications.
If the system is low on refrigerant, use a refrigerant recovery machine to evacuate the system and recharge it with the correct type and amount of refrigerant.

5. Inspect and Replace Cabin Air Filter

Locate the cabin air filter housing, typically behind the glove box.
Remove the glove box for access, if necessary.
Take out the old cabin air filter and check for dirt and blockages.
Install a new cabin air filter, ensuring it is oriented correctly.

6. Reconnect Battery and Test

Reconnect the battery terminal.
Start the vehicle and turn on the AC to check if it is now functioning properly.