my Genesis G70 makes a burning smell when I turn on the AC, what's wrong?

Genesis G70 IG (2017-2023)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

536 words

Problem Statement

Learn how to diagnose and fix the burning smell when turning on the AC in your Genesis G70. 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 battery before working on electrical systems.
•Use proper ventilation when handling refrigerants.

Symptoms

•Burning smell when AC is turned on
•Possible reduced cooling performance from the AC
•Unusual noises coming from the AC compressor or blower
•Increased engine temperature (if related to compressor strain)
•AC system not engaging properly

Diagnostic Steps

1
Inspect the AC compressor for any visible signs of damage or leakage.
2
Check the AC belt for wear, fraying, or correct tension.
3
Use an OBD-II scanner to check for any related error codes or HVAC system faults.
4
Inspect the cabin air filter for clogs or debris that could restrict airflow.
5
Examine the AC condenser for any obstructions or damage.
6
Check refrigerant levels to ensure the system is properly charged.

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

•Socket set
•Torque wrench
•AC manifold gauge set
•Refrigerant recovery machine

Parts Required

•New AC compressor
•Seals and O-rings for refrigerant lines
•Refrigerant (R134a or R1234yf as per vehicle specifications)

Related Faults

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Diagnostic Steps

1
Inspect the AC compressor for any visible signs of damage or leakage.
2
Check the AC belt for wear, fraying, or correct tension.
3
Use an OBD-II scanner to check for any related error codes or HVAC system faults.
4
Inspect the cabin air filter for clogs or debris that could restrict airflow.
5
Examine the AC condenser for any obstructions or damage.
6
Check refrigerant levels to ensure the system is properly charged.

Solution

1. Preparation

Ensure the vehicle is parked on a flat surface, and the engine is off.
Gather tools and safety equipment.
Disconnect the battery to prevent any electrical shorts.

2. Inspect and Replace the AC Compressor

Tools Required: Socket set, torque wrench, AC manifold gauge set, refrigerant recovery machine.
Remove any components obstructing access to the AC compressor.
Disconnect the electrical connector and refrigerant lines from the compressor.
Remove the mounting bolts and carefully take out the compressor.
Compare the old compressor with the new one for compatibility and fit.

3. Install New AC Compressor

Position the new compressor in place and secure it with mounting bolts to the specified torque (check manufacturer specifications).
Reconnect the refrigerant lines and electrical connector.
Ensure all seals are replaced to prevent leaks.

4. Refill Refrigerant

Connect the AC manifold gauge set to the service ports.
Use a refrigerant recovery machine to recover old refrigerant if necessary.
Recharge the system with the correct type and amount of refrigerant as per manufacturer specifications.

5. Test AC System

Reconnect the battery and start the engine.
Turn on the AC and observe for any unusual smells, noises, or performance issues.
Monitor the system pressures using the manifold gauge set to ensure proper operation.