Does coolant affect air conditioning?

I’m a bit overdue on a coolant flush and I’ve noticed that my AC isn’t working as well. Does coolant affect air conditioning?

Bianca (Bee) Davis · Updated on
Reviewed by Shannon Martin, Licensed Insurance Agent.
The short answer is yes, coolant can affect air conditioning performance in a number of ways. Typically, coolant can affect your AC’s temperature, humidity, and airflow.
Your AC’s temperature may be affected by the proximity of your car’s interior to your engine. This means your coolant is working correctly to draw heat from your engine, but it may be inadvertently heating up the AC.
Airflow can also be affected by insufficient coolant in the engine, as coolant is responsible for cooling the air that your AC produces.
Finally, not having enough coolant might cause humidity issues. If there isn’t enough moisture in the engine block, your AC could dry out the inside of your car.
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