Chevy Suburban AC Not Working – How To Fix

By Max Anthony •  Updated: 01/19/23 •  3 min read

Chevy Suburban AC Not WorkingAC is one of the most important systems in a car. It helps to keep you cool and comfortable while you’re driving. If your AC doesn’t seem to be working properly, there are a few things you can do to fix the problem.

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Possible Reasons Why Chevy Suburban AC Not Working

Cabin Air Filter is Dirty

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

To fix this issue, you should inspect the cabin air filter in order to determine if it needs to be replaced. It is generally better to first clean the cabin air filter before replacing it. You should first clean the pollen filter by using a vacuum cleaner or a heated air system that uses hot air. You should be able to get rid of at the very minimum some of the dirt particles that are on the air filter.

Unfortunately, using this method prevents you from accessing the deeper levels of the filter. As a result, even after cleaning, the filter performance won’t considerably improve. There is typically no escaping change.

Clogged or Dirty Condenser

The Chevy Suburban’s air conditioning condenser, which is located at the front of the car like the radiator, is in charge of dissipating the refrigerant’s heat into the outside air. Its surface and the spaces in its mesh can accumulate dirt, insects, and other microscopic particles over time. Because less air travels through the mesh, the condenser’s capacity to dissipate heat is hampered, which leads to inadequate interior cooling.

If you have a condenser that is clogged on the underside of a Chevy Suburban, the quickest way to get it to work again is to get some water in it. For cleaning, you have to take down the bumper in order to get into the condenser. If you are planning to clean the condenser with a pressure washer, do it slowly and at a low pressure. This will protect the sensitive fins on the condenser.

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Leak of Refrigerant

A failing air conditioning system is still mostly due to a lack of refrigerants. Due to the design, a loss of up to 15 percent of the refrigerant annually is typical. The refrigerant level in your Suburban system will ultimately drop so low that it no longer has the ability to cool your vehicle if you don’t have it serviced on a regular basis. Simply have it refilled to resume enjoying comfortable driving conditions. If the refrigerant level drops fast and then rises again, a leak is very certainly present.

It is very difficult to find these small leaks. In the workshop, it is possible to fill the pipeline with some causing gas (nitrogen with a bit of hydrogen). Large leaks are easy to detect by using a leak detector or by spraying a leak detector spray on all components. Those with small leaks must be located by using a gas detector to search for them. Once a leak is found, it must be sealed over and over by simply removing the leaking part and installing a new one.

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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.