Mazda CX-9 Climate Control Problems

Having problems with your Mazda CX-9’s climate control system? We’ll walk you through some of the common issues.
Written by Bonnie Stinson
Reviewed by Melanie Reiff
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Your Mazda CX-9’s climate control problem could stem from a dirty cabin air filter, refrigerant leak, or other issues. Here, we’ll walk you through some of the common issues and how to get them fixed.
The Mazda CX-9 is a practical SUV with plenty of cargo space and a third-row seat, but its sporty exterior and near-luxury interior features make the CX-9 comfortable as well as useful. 
If your CX-9’s A/C is blowing hot air or just not working at all,
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Reasons your Mazda CX-9 A/C isn’t working

The truth is, there’s a lot that could go wrong with your climate control system. While electrical issues are usually the main culprit, here are some other issues that could be causing your A/C to malfunction:

Dirty cabin air filter

Over time, your cabin’s air filter can become clogged with dirt and debris. When this happens, the overall performance of your A/C system will deteriorate. 
A dirty cabin air filter will significantly reduce cooling, so if you’re having this issue you may want to get a new filter installed. It’s recommended that you replace your Mazda cabin air filter every 10,000 to 20,000 miles to keep it in good working order.

Blend door actuator malfunction

Your blend door actuator controls the airflow and temperature of your A/C system. If you’re having problems with your climate control temperature and you hear a slight clicking noise coming from under the dashboard, chances are your blend door actuator is to blame.

A/C refrigerant leak

Your CX-9 will lose a little refrigerant over time, but with a serious refrigerant leak, your climate control system will no longer be able to cool your vehicle. 
You can refill your refrigerant, but it won’t do much good unless you search for and seal any leak points as well. 
Defective sealing rings, cracked or damaged lines, or a damaged condenser can all cause your refrigerant to leak out of your vehicle. Leaks are generally difficult to find, so it’s best to take your vehicle to a mechanic to help you find and fix the leak.

A/C compressor failure

Your compressor is a crucial part of your A/C system that converts gaseous coolant to liquid. 
If you don’t use your A/C often enough, parts in your compressor will stick and cause irreparable damage. If this component starts to malfunction, you’ll have to get a
Mazda compressor replacement
to fix your climate control system. 

Dirty or clogged condenser 

Your CX-9’s condenser is responsible for releasing heat from your refrigerant to help keep your vehicle cool. However, bugs, dirt, and grime can build up on the mesh of your condenser and hinder its ability to release heat. 
If you’re having a hard time cooling down your CX-9, a dirty condenser might be to blame.
You can use a power washer on a low-pressure setting to clean off your condenser and see if that solves your problem. If not, there might be a broken part or a leak that will need to be repaired by a professional.

Dirty evaporator

Sometimes, dirt and debris can get past your cabin’s air filter and collect on your evaporator. The buildup of dirt and grime on the evaporator can block its airflow, which will result in poor cooling. 
If the airflow from your vents is choppy or you noticed a moldy smell, chances are your evaporator needs to be cleaned.
Cleaning your evaporator is difficult—in most cases, the entire dashboard has to be removed to access it. It’s best to have a professional inspect your evaporator and clean it if it has become clogged.

Bad blower motor

If you’re not getting any airflow from the vents in your Mazda CX-9 (or the airflow is significantly reduced), you may have a bad blower motor. You’ll most likely hear abnormal sounds if your blower motor is malfunctioning. 
If a blower motor is damaged, there’s no way to repair it. You’ll have to
get your blower motor replaced

How to diagnose a Mazda CX-9 climate control malfunction

Before you start trying to make repairs to your Mazda CX-9’s climate control system, it’s important to identify the main cause of the issues. With so many potential reasons why your system is acting up, it’s crucial to get an accurate diagnosis. 
If you have an onboard diagnostics (OBD) scanning tool, you can use it to
get a trouble code
that may help you narrow down the specific causes of your A/C problems. You can also take your vehicle to a mechanic that’s certified in HVAC repair to help diagnose and resolve the climate control issues.

How to keep Mazda CX-9 insurance costs low

The Mazda CX-9 isn’t quite a luxury vehicle, but with loads of standard features onboard, your
car insurance
premiums may be higher than average. 
So while you’re giving your climate control system a reset, why not check in on your insurance premiums as well?
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