2020 CR-V AC Not Cold & Musty Smell - DIY Fixes?

ClearTheCode admin answer:

It's great you're looking to tackle this yourself first! Both the lack of cold air and the musty smell are common issues with DIY solutions.

Here's a step-by-step approach:

1. Check and Replace Cabin Air Filter: This is the easiest and most common fix for both reduced airflow and musty smells. A clogged filter restricts air and can trap moisture, leading to mold and odors. It's usually located behind the glove box and is very easy to replace. Honda recommends replacing it every 15,000 miles or once a year.
2. Inspect AC Drain Tube: A musty smell can also indicate moisture buildup in the evaporator core, often due to a clogged AC drain tube. This tube allows condensation to exit the vehicle. If it's blocked, water can pool, leading to mold. You can often find the drain tube underneath the car, usually on the passenger side, and clear it gently with a wire or compressed air.
3. Refrigerant Level (with caution): Low refrigerant can cause the AC to blow less cold. While DIY recharge kits are available, they often don't address the root cause (a leak) and can overcharge the system, causing more damage. If you suspect low refrigerant, it's best to have a professional check for leaks and properly evacuate and recharge the system.

When to see a shop:

• If replacing the cabin filter and checking the drain tube doesn't resolve the issue.
• If you hear unusual noises from the AC system (e.g., clicking, grinding).
• If you suspect a refrigerant leak, as this requires specialized equipment for diagnosis and repair.
• If the compressor isn't engaging or the system isn't cooling at all, indicating a potentially more serious component failure.