Why is my AC not blowing in my Chevy Trax?

Typically, no air from the vents in a Chevy Trax means the blower circuit isn’t functioning: a blown fuse, a failed blower motor or resistor, or a climate-control switch/module issue. Start with simple checks before diving deeper.

Understanding the HVAC system in the Trax

The Trax’ climate-control system relies on the blower motor to push air through the dash vents, with the speed controlled by a resistor or electronic control module. If you’re not feeling air regardless of fan speed, the issue is usually electrical rather than refrigerant-related. Air can still be present but not directed correctly if blend doors or actuators fail.

Common causes

These are the typical culprits for no airflow in many Chevy Trax models.

• Blower fuse or relay has failed: a blown fuse stops power to the blower motor.


• Blower motor or its resistor has failed: the most common electrical failure that stops airflow at all speeds or on low speeds.


• Faulty HVAC climate-control switch/module: the control unit may not send power to the blower motor or may misdirect airflow.


• Vent or blend-door issues: broken or stuck doors/actuators can block airflow or misdirect it even when the blower runs.


• Wiring harness problems or loose connections: corrosion, vibration, or improper repairs can interrupt power or control signals.

Addressing these issues usually starts with electrical checks and visual inspection of fuses and connectors; more complex problems may require professional diagnosis.

Quick diagnostic steps you can perform

Before you book a service appointment, you can perform a few basic checks to quickly identify likely causes.

These steps focus on the blower system and its control circuitry. If you’re not comfortable handling electrical components, skip ahead to professional help.

• Check the interior fuse box for the blower motor fuse and any related fuses. If a fuse is blown, replace it with the same rating and test the system.


• Turn the ignition on and set the HVAC to the highest fan speed across multiple settings. If the blower motor does not respond at any setting, the issue is likely with the motor, resistor, or power supply.


• Verify the HVAC controls: ensure the system is not stuck in an OFF state, and that the mode selector is set to a venting position (e.g., face vents) and not exclusively to FLOOR or DEFROST unless intended.


• Check for power at the blower motor connector: if you’re comfortable, test for 12V at the blower plug when the fan is on; absence of voltage indicates a control circuit or wiring problem.


• Inspect for obvious wiring issues: loose connectors or damaged wires at the under-dash area can interrupt the blower circuit—only attempt if you’re safe and comfortable.

These checks cover the most common, inexpensive-to-fix causes of no airflow. If you find no issues here, or the blower runs intermittently, professional diagnostics are recommended.

Deeper diagnostics and next steps

If basic checks don’t restore airflow, consider a more thorough diagnostic process to pinpoint whether the problem lies with the blower motor, resistor, control module, or blend doors.

1. Listen for the blower motor: if you hear a faint hum or nothing at all, the motor or its power supply may be defective.


2. Re-examine fuses and relays: some models have separate fuses for the blower motor and the HVAC control module; verify both are intact.


3. Test blower motor voltage: with proper tools, verify 12V at the blower connector when the fan is turned on; no voltage points to a wiring or control issue.


4. Assess the resistor pack (low-speed settings): if high speed works but low speeds don’t, the resistor pack may be failing.


5. Assess blend doors and actuators: if air quantity is fine but airflow direction is wrong or inconsistent, the blend-door actuator may be stuck or faulty; this often requires dash disassembly and professional service.

In summary, deeper diagnostics help identify whether the issue is electrical (fuse, relay, wiring), the blower assembly itself, or a control/actuator problem. If you’re not comfortable with these steps, a professional diagnostic is the safest route, and you might also learn if there are any related recalls or service bulletins for your Trax model year.

When to seek professional help

If the blower remains silent after these checks, or if you notice burning smells, overheating components, or HVAC codes, a technician should diagnose the blower motor, resistor pack, or HVAC control module. A dealer or experienced shop can perform targeted tests and verify potential recalls or service bulletins that apply to your Trax.

Note: A weak battery or electrical system issue can impact HVAC performance; ensuring the vehicle’s electrical system is healthy can prevent intermittent HVAC problems.

Summary

Airflow issues in a Chevy Trax are most often caused by a blown fuse, a failed blower motor or resistor, or a faulty climate-control switch or module. Start with fuse checks and basic controls, then progress to testing the blower motor and wiring. If simple checks don’t restore airflow, consult a professional for a precise diagnosis and repair, especially if blend doors or HVAC electronics are involved. Stay aware of any applicable recalls or service bulletins for your exact model year.

Why is there no air blowing out of my car AC?

Your AC might not be blowing air due to a clogged cabin air filter, a failed blower motor, or electrical issues like a blown fuse. Other possible causes include a problem with the AC compressor or a lack of refrigerant. 
This video explains common issues and checks for a car's AC not blowing air, including blower motor problems: 55sMercie J Auto Care, llcYouTube · May 23, 2024
Common reasons for no airflow

• Clogged cabin air filter: A dirty filter can become so blocked with debris that it prevents air from passing through. This is a very common and easily fixed problem. 
• Failed blower motor: The blower motor is the fan that pushes air into the cabin. If it fails, no air will blow at all. You might hear strange noises when the AC is on if the motor is failing. 
• Electrical issues: Problems with fuses, relays, or wiring can prevent the blower motor from receiving power. 
• Damaged or disconnected parts: A vacuum line could be disconnected or a damper could be damaged, which would stop airflow to the vents. 
• Frozen-up system: In some cases, the AC system can freeze up, which also stops the airflow. 

What to do

• Check the cabin air filter: Refer to your car's owner's manual for the location (often behind the glove box), then inspect and replace the filter if it looks dirty. 
• Check fuses and relays: Look for a blown fuse related to the HVAC system in your car's fuse panel and replace it if necessary. You can also try wiggling or swapping the blower motor relay to see if that helps. 
• Listen for the blower motor: With the car on, turn your AC on and off. If you hear a humming or clicking from the motor but no air is coming out, it could be a sign that the motor itself is failing. 
• If these don't work, consult a professional: If you can't fix the problem yourself, a mechanic can properly diagnose and repair issues with the blower motor, electrical system, or other components. 

This video demonstrates how to check if your AC is low on refrigerant: 58sScotty KilmerYouTube · Jun 7, 2010

How do you reset the AC on a Chevy?

The quickest fix is to try resetting the AC compressor relay. Locate your fuse box (usually located on the driver's side) and find the AC compressor relay. Remove it with pliers or your fingers, inspect it for damage, count to 10, and then push it firmly back into place.

How do I reset my blower fan?

Most blower motors are controlled by a red or black switch on the side of the unit. Hold the button down for a few seconds (the manual will tell you precisely how long), then release. Replace the Panel and Restore Power.

What is the most common problem with Chevy Trax?

In fact, 30% of the complaints on file with NHTSA involve the engine, powertrain, or fuel system. The complaints range from fuel injector failure to a fire in the engine compartment. Turbocharger problems are also among the common Chevrolet Trax problems.