Chevy Trailblazer AC Not Working – How To Fix

By Max Anthony •  Updated: 12/21/22 •  3 min read

Chevy Trailblazer AC Not Working

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A key element of your Chevy TrailBlazer’s ventilation system is the pollen filter, sometimes referred to as the cabin filter or micro filter. Reduced cooling, heating, and air movement come from a deteriorated internal ventilation system from a dirty filter. Additionally, it overworks the entire AC system, which increases fuel consumption in your TrailBlazer.

The most frequent reasons why your Chevy TrailBlazer’s air conditioning system fails to function normally include a dirty cabin air filter, a refrigerant leak, a dirty or clogged condenser, a dirty or clogged evaporator, a poor blower motor, a defected compressor, a malfunctioning blend door actuator, or any electrical system issue.

Why Chevy Trailblazer AC Is Not Working

One of the main reasons why the AC in a TrailBlazer does not blow cold air is that there is not enough refrigerant in the system. This may occur as a result of a leak or if the AC hasn’t been recharged in a while.

Your TrailBlazer may have low refrigerant levels without necessarily having a leak. In a fully sealed AC system, the refrigerant should ideally never leak, but due to minor flaws, most automotive AC systems do leak a small quantity of refrigerant over time and require recharging every few years.

Another potential cause of your TrailBlazer’s air conditioning system not functioning properly is a condenser that is blocked or leaking. A leaking condenser can result in refrigerant loss and decreased system cooling capacity. A leak search is conducted in the workshop using forming gas to discover leaks in the air conditioning system; even the smallest leaks can be found. This makes it possible to identify whether the condenser is to blame for the refrigerant loss. If so, your only choice is to replace the damaged component.

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How to Fix Chevy Trailblazer AC Not Working

Start by checking the TrailBlazer’s cabin air filter for damage. It is frequently advised to first clean the pollen filter before replacing it. This can be accomplished, for instance, by eliminating the majority of the visible dirt particles with a vacuum cleaner or a compressed air system. Unfortunately, using this method prevents you from accessing the deeper layers of the filter. As a result, even after cleaning, the filter performance won’t considerably improve.

The simplest fix for a filthy condenser on your TrailBlazer is to clean it. In order to access the condenser for this, the front bumper is typically removed. Cleaning can be done using a power washer, but be sure to use the low pressure setting because excessive pressure can easily harm the condenser’s fragile fins.

A ruined compressor is typically beyond repair. The parts continue to move if the air conditioner is regularly turned on. However, the pieces will cling if you don’t use your TrailBlazer’s air conditioner for a long period. The end consequence is a damaged compressor that cannot be fixed. The only solution is to replace it with a new one.

Your Chevy TrailBlazer’s air conditioning might not be functioning properly for a variety of reasons. Always start with the most obvious cause, a low refrigerant level in the system, when determining the cause.

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Max Anthony

Max is a gizmo-savvy guy, who has a tendency to get pulled into the nitty gritty details of technology and cars. He attended UT Austin, where he studied Information Science. He’s married and has three kids, one dog and a GMC truck and a Porsche 911. With a large family, he still finds time to share tips and tricks on cars, trucks and more.

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