my Volvo XC90 Second Generation (2015-2024) smells musty, how do I get rid of the odor?

Volvo XC90 Second Generation (2015-2024)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

501 words

Problem Statement

Learn how to eliminate musty odors in your 2015-2024 Volvo XC90 HVAC system. Step-by-step guide with diagnostic steps and repair instructions.

Affected Component

HVAC

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical components.

Symptoms

•Musty smell when the vehicle's air conditioning or heating is in use
•Moisture on interior surfaces
•Dampness in carpets or upholstery
•Possible condensation visible on windows
•Reduced airflow from HVAC vents

Diagnostic Steps

1
Inspect the cabin air filter for dirt, debris, or mold.
2
Check for leaks in the windshield or door seals that may be allowing water ingress.
3
Examine the HVAC system for signs of mold or mildew growth.
4
Inspect the undercarriage and wheel wells for clogged drainage holes or blocked sunroof drains.
5
Use an OBD-II scanner to check for any related error codes that may indicate HVAC system issues.

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

•Screwdriver set
•Vacuum cleaner
•Cloths
•Spray bottle

Parts Required

•New cabin air filter
•HVAC cleaning solution

Related Faults

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Diagnostic Steps

1
Inspect the cabin air filter for dirt, debris, or mold.
2
Check for leaks in the windshield or door seals that may be allowing water ingress.
3
Examine the HVAC system for signs of mold or mildew growth.
4
Inspect the undercarriage and wheel wells for clogged drainage holes or blocked sunroof drains.
5
Use an OBD-II scanner to check for any related error codes that may indicate HVAC system issues.

Solution

1. Preparation

Gather tools: screwdriver set, vacuum cleaner, cloths, and a spray bottle.
Ensure the vehicle is parked in a well-ventilated area.
Disconnect the battery if working on electrical components.

2. Replace the Cabin Air Filter

Locate the cabin air filter access panel (usually located behind the glove compartment).
Remove screws or clips securing the panel and gently pull it off.
Take out the old cabin air filter, noting its orientation.
Install the new filter, ensuring it is oriented correctly.
Reattach the access panel securely.

3. Clean the HVAC System

Purchase an HVAC cleaning solution specifically designed for automotive use.
Turn on the vehicle and set the HVAC system to the recirculate mode.
Spray the HVAC cleaning solution into the air intake vents (usually located at the base of the windshield).
Let the system run for 10-15 minutes to allow the solution to circulate and disinfect the system.

4. Address Moisture Issues

Remove floor mats and inspect the carpet for dampness.
Use a vacuum cleaner to extract moisture from the carpet.
If carpets are excessively wet, allow them to dry completely; consider using a dehumidifier in the vehicle.
Inspect and clear any clogged drainage holes or sunroof drains.